Assume that a cell has 20 chromosomes and 10 picograms of dna at g1 of the cell cycle. at the end s phase this cell will contain ____________.
Answers
At the end of S phase of the cell cycle, the cell will contain 20 chromosomes and 20 picograms of DNA. This is because during S phase, DNA replication occurs, resulting in the formation of two identical copies of each chromosome, called sister chromatids. The amount of DNA in the cell doubles during S phase, as each chromosome now has two copies of its DNA. However, the number of chromosomes remains the same, as the sister chromatids are still considered to be a single chromosome until they separate during cell division. Therefore, the cell will have 20 chromosomes and 20 picograms of DNA at the end of S phase.
Related Questions
When grey wolves were reintroduced back into Yellowstone
Answers
Answer:
1995
Explanation:
Grey wolf packs were reintroduced to Yellowstone National Park and Idaho starting in 1995.
hope it helpful
what is a rain shadow area
Answers
Answer:
Rainshadow is the area where rain is not experienced
Answer:
Explanation:
A rain shadow is a patch of land that has been forced to become a desert because mountain ranges blocked all plant-growing, rainy weather. ... On the other side of the mountain—the rain shadow side—all that precipitation is blocked. In a rain shadow, it's warm and dry.
1. Changing environmental conditions, such as temperature or pH, can affect enzyme shape. How would this alter the enzyme's function?
Answers
hi <3
changes in the enzyme's shape would decrease its ability to function as this would change the active site of the enzyme, meaning it is harder for it to carry out its job.
this is why we try to keep enzymes in their optimum environmental conditions so they can function their best
hope this helps :)
1.23 Why is an ISA unlikely to change between successive generations of microarchitectures that implement it
Answers
An ISA (Instruction Set Architecture) is unlikely to change significantly between successive generations of microarchitectures that implement it because it represents the interface between software and hardware.
The ISA defines the set of instructions that a processor can execute and the way in which those instructions are encoded. It also defines the way in which the processor interacts with memory, input/output devices, and other components of a computer system.
Changing the ISA can have significant implications for software compatibility, as software is typically written to target a specific ISA. Changing the ISA could make existing software incompatible with the new microarchitecture, requiring software developers to rewrite and recompile their code.
This could be a significant barrier to adoption, as users may be reluctant to upgrade if it means their existing software will no longer work.
Additionally, changing the ISA could require significant changes to the microarchitecture itself, as the hardware must be designed to execute the new instructions and interact with memory and other components in a different way.
This could increase the complexity and cost of development, as well as the risk of introducing new bugs or performance issues.
Therefore, ISA designers and microarchitecture developers often strive to maintain compatibility between successive generations of microarchitectures to minimize the impact on software and the cost of development.
This may involve making small, incremental changes to the ISA to add new instructions or improve performance, while maintaining overall compatibility with existing software.
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A woman is red-green colorblind, and she mates with a man who has normal color vision. Knowing that red-green colorblindness is controlled by a gene on the x chromosome, what can you predict for their children with regard to inheritance of color vision?.
Answers
There will be equal numbers of males and girls who are colorblind predict for their children with regard to inheritance of color vision.
What is the main function of a chromosome?DNA may be precisely duplicated during these cell divisions thanks to chromosomes. I'll tell it one more. Our cells' nuclei include chromosomes, enabling precise DNA replication throughout cellular division. This guarantees the efficiency and success of our internal processes.
How many genes do chromosomes contain?There are various sizes between chromosomes. With over 900 genes compared to the Y chromosome's 55, its human Karyotype was roughly three times bigger than the Y chromosome. Chromosomal anomalies' distinct structure keeps DNA firmly twisted around threaded rod proteins known as histones.
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Metamorphism may involve all of the following except __.
A. formation of new minerals
B. changes in rock texture: grain size, grain shape, foliation, et cetera C. metasomatism
D. complete melting of the rock
E. recrystallization
Answers
The correct option is (D) complete melting of the rock . Metamorphism may involve all of the following except complete melting of the rock. Complete melting of rock is not included in the processes of metamorphism.
Metamorphism is the process of changing rocks that are in a stable condition at earth's surface to a condition that is different from the original due to heat, pressure, or chemical action. Metamorphism occurs when rocks are subjected to high heat, high pressure, or chemical action. As a result of these factors, the rock's original texture, mineral content, and physical and chemical characteristics may change.
Metamorphism may involve formation of new minerals, changes in rock texture: grain size, grain shape, foliation, et cetera, metasomatism, and recrystallization.
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Two healthy parent produce a child with the genetic diorder of cytic fibroi which i the reult of a receive gene. What would be the bet explanation for thi inheritance
Answers
To have CF, a person must inherit two CF genes. When you and your partner conceived your child, he or she acquired a CF gene from both of you.
A child can inherit CF if both parents possess the CF gene (either has CF or is a carrier) and both parents pass the CF gene on to their child.
Some genes have mutations that cause them to malfunction. A carrier is someone who has one non-functional copy of the gene. Carriers with CF have no symptoms, but they can pass on the inactive gene to their children. To have CF, a person must inherit two non-functioning CF genes, one from each parent.
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If a trait is found to be determined by a gene found only on the x chromosome, it is considered to be?.
Answers
Genetic diseases connected to X-chromosome gene mutations are known as X-linked recessive inheritance.
Explain about the Inheritance?As it relates to genetics, the term "inherited" describes a feature or variation that is encoded in DNA and passed from parent to child during reproduction. The laws of Mendelian genetics govern inheritance.
Genetics is frequently used to refer to heredity, which is the passing on of genetic traits from one generation to the next. The passage of genetic features and their manifestation from one generation to the next is shown by inheritance.
The basic unit of inheritance is thought to be the gene. Parents pass on their genes to their children, which include the data required to define physical and biological features. The majority of genes produce distinct proteins or portions of proteins, each of which performs a different function in the body.
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If brown bears did not change the composition of their cell membranes during winter months, what would be the effect on the fluidity of their cell membranes
Answers
Answer:
I have no idea good point
Explanation:
explain how rna and dna are related
Answers
Answer:
RNA is somewhat similar to DNA; they both are nucleic acids of nitrogen-containing bases joined by sugar-phosphate backbone. How ever structural and functional differences distinguish RNA from DNA. Structurally, RNA is a single-stranded where as DNA is double stranded. DNA has Thymine, where as RNA has Uracil.
Explanation:
According to your author, which of the following functions of connective tissue is its most important function?
A. forming glands
B. protection
C. transport of fluid, nutrients, waste
D. energy storage
E. support and connect other tissues
Answers
is the sequence of a dna strand is AAGCCA what are the bases on its complementary strand
Answers
Question 1 (2 points)
How did we define homeostasis?
Question 1 options:
Actively changing due to an environmental stimulus
Taking “raw” materials and turning it into a usable energy
The ability to increase in size and complexity
Regulation of bodily functions to stay within a certain range
Question 2 (2 points)
Saved
A hypothesis can be described as
Question 2 options:
a testable explanation.
a theory.
a law.
a wild guess.
Question 3 (2 points)
You notice you begin to sweat whenever the door to your bedroom is closed. This is most closely related to which step in the scientific method?
Question 3 options:
making an observation
forming a hypothesis
forming a conclusion
recording data
Question 4 (2 points)
In an experiment, the variable being tested or changed is the
Question 4 options:
control variable
dependent variable
responding variable
independent variable
Question 5 (1 point)
Match each of the following terms with the correct definition?
dependent variable
controls or constants
independent variable
hypothesis
1.
An testable explanation to explain a natural phenomenon
2.
the variables that are held constant in an experiment
3.
the variable that is measured as data in an experiment
4.
the variable that is controlled by the experimenter
Question 6 (2 points)
Some chickens lay an egg every day. Other chickens produce few eggs. A study is planned to examine some factors that might affect the number of eggs produced by chickens. Which of the following is NOT a suitable hypothesis for the study?
Question 6 options:
If the cage for the chickens is larger, they will produce more eggs.
If more eggs are produced by the chickens, they will lose more weight.
If there is more protein in the feed, then more eggs are produced.
If chickens receive more hours of light, then they will produce more eggs.
Question 6 (2 points)
Some chickens lay an egg every day. Other chickens produce few eggs. A study is planned to examine some factors that might affect the number of eggs produced by chickens. Which of the following is NOT a suitable hypothesis for the study
If the cage for the chickens is larger, they will produce more eggs.
If more eggs are produced by the chickens, they will lose more weight.
If there is more protein in the feed, then more eggs are produced.
If chickens receive more hours of light, then they will produce more eggs.
Sam wished to investigate how fertilizer run-off affects the growth of algae in freshwater lakes and streams. He set his experiment up as follows. He placed 900 ml of water into each of five 1000 ml glass beakers. To each beaker, he added 5 ml of water from an aquarium which contained a large concentration of algae. The beakers were placed under a lamp which was on a timer to provide 12 hours of light each day. Liquid fertilizer was added to the beakers in the following amounts.
Each week, a random sample from each of the beakers was examined under a microscope to get a count of the number of algal cells present.
What is the independent variable in this experiment?
Answers
Answer:
question 1 is 4. question 2 is 2. question 3 is 1. question 4 is 2. question 5 is 1=3 2=2 3=4 4=1. question 6 is 2
what possible effect(s) would this trna mutation have on gene expression throughout the cell? do you think cells with such a mutation would be viable? explain your reasoning. g
Answers
New alleles can only be produced within a population through mutation. The diversity on which survival of the fittest acts is produced by mutations.
What does mutation entail?Any modification to the DNA sequence of a cell. Mutations can occur as a result of environmental DNA-damaging agents being exposed to, or as a result of errors in cell division. Hereditary mutations include, but are not limited to, hemophilia, sickle cell disease, and genetic disorders. Further mutations may develop on their own at any time over a person's lifetime.
How harmful are mutations?Modifications to your DNA's sequence are known as genetic mutations, which happen when your cells divide and make copies of themselves. Your body learns from your DNA when and how it should grow and function. Genetic mutations may cause genetic problems like cancer.
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4 Is it possible for a plant to be photosynthesising and respiring at the same time
Answers
Answer:
Photosynthesis occurs only during the day in plants and algae , cellular respiration occurs both Night and Day . The two processes take place in different cellular organelles (The cholroplast and mitochondria , respectively and occur simultaneously)
How does the Amazon rainforest contribute to the health of the planet?
-It filters the circulating air of the planet.
-It protects twenty-five percent of the world’s plant species.
-It stores 100 billion metric tons of carbon.
-It produces fifty percent of the world’s oxygen.
Answers
Answer:
It protects twenty-five percent of the world’s plant species.
Explanation:
Answer:
It stores 100 billion metric tons of carbon.
Explanation:
.
What is the name of a species that is the first species to colonize an
area?
Select one:
a. Frontier species
b. Pioneer species
c. Explorer species
d. Pilgrim species
Answers
Answer:The answer is b. Pioneer species
Step-by-step explanation; The first species to colonize an area after a major disturbance are called pioneer species; they help to form the new environment. Secondary succession occurs after a disturbance such as a forest fire, where there is still some organic matter to allow new plants to grow.
If allele proportions in a migrant population are different than the proportion in your population of interest, what would you expect to happen to allele proportions in your population of interest? How might population size of the population of interest influence this
Answers
Migration will alter gene frequencies by introducing new alleles created by mutation or by introducing more copies of alleles already present in the population. Population size of the population of interest can influence this, as larger populations are more likely to have more variation.
Genetic drift may cause rare alleles to disappear, which can potentially shrink the gene pool. Because genetic drift can also cause a new population to become genetically distinct from its ancestor population, it is thought that genetic drift aids in the development of new species.
Gene flow within a community has the potential to promote genetic diversity, but gene flow between populations with different genetic make-ups has the potential to reduce genetic diversity.
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Part A
You will create a molecular clock model for an arthropod gene. Follow these guidelines to make your model:
Your timeline will span from 90 million years ago to the present. The common ancestor in your model is an arthropod that lived 90 million years ago. The gene that you’ll track codes for a protein in the species’ venom.
The DNA sequence you’ll track contains 10 nitrogen bases. You can choose the order of the bases and where the mutations occur.
This gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. To build your model, calculate the estimated time period it takes for 1 base pair to mutate.
The first time period will only show the common ancestor. At the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences.
The first and third descendant species will survive for the rest of the timeline. The second descendant species was extinct 50 million years ago.
Calculate how long it will take for one full base pair mutation to occur. Explain your reasoning by constructing a mathematical equation.
Part B
Using this sample model as a guide, create a molecular clock model. Use the flowchart tools in your word processing program to make your model. Make sure the mutations are clearly visible in the strand. Consider using a different font color for the mutations. Use the Insert Image button to insert a screenshot of your model in the answer space provided.
Answers
The estimated time period it takes in arthropod gene for 1 base pair to mutate is 22.5 million years.
What is arthropod gene?Arthropod gene is a type of gene found in arthropods. Arthropods are a group of animals that includes insects, spiders, and crustaceans. Arthropod genes are essential for the development, growth, and maintenance of the arthropod body. They are responsible for controlling the formation of organs, body parts, and other structures that make up the arthropod body. Arthropod genes also help control the development of behaviors, such as feeding and reproduction. Many arthropod genes have been identified and studied in detail, providing insights into their evolution and their role in the development of arthropods. Understanding arthropod genes can also provide new insights into the development of other organisms, as arthropod genes are often similar to those found in other animals.
The estimated time period it takes in arthropod gene for 1 base pair to mutate is 17.1 million years. This can be represented mathematically as: T = 17.1 million years / 0.76 base pairs = 22.5 million years.
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In order to catalyze reactions, enzymes frequently require additional substances in their active site. What is the name for this family of substances?.
Answers
The name for this family of substances is cofactors. Cofactors are substances that enzymes require in order to catalyze reactions. Enzymes are proteins that serve as catalysts for chemical reactions in the body.
Cofactors can be either inorganic, such as metal ions, or organic, such as vitamins. Inorganic cofactors are usually bound to the enzyme's active site, while organic cofactors can either be bound or free.
Enzymes catalyze reactions by lowering the activation energy required for the reaction to occur. The binding of the substrate to the active site of the enzyme creates an environment that is conducive to reaction.
The presence of a cofactor can further lower the activation energy by providing an alternative pathway for the reaction to occur. In some cases, the cofactor itself may be used up in the reaction.
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The supplementary motor area and the premotor cortex are areas of __ and, in general, are involved in ___.
Answers
The supplementary motor area and the premotor cortex are areas of the brain, and, in general, are involved in the control of voluntary movement.
Voluntary movement of the body requires the control of skeletal muscle contraction by the nervous system. It is one of the functions of the central nervous system. The motor areas of the brain include the primary motor cortex, the supplementary motor area, and the premotor cortex. The supplementary motor area and the premotor cortex are areas of the brain, and, in general, are involved in the control of voluntary movement.These areas are responsible for the generation and execution of voluntary movements by controlling the contraction of skeletal muscles.
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write a letter to your parents about your school
Answers
Dear Mom and Dad,
I hope this letter finds both of you in good health and high spirits. I wanted to take a moment to tell you about my school and the wonderful experiences I have been having here.
First and foremost, I want to express my gratitude to both of you for the opportunity to attend such a remarkable institution. The education I am receiving at this school is truly top-notch, and I feel fortunate to be a part of it.
The teachers here are passionate, knowledgeable, and dedicated to our growth and development. They go above and beyond to ensure that we receive a well-rounded education that prepares us for the future.
One of the aspects that I appreciate the most about my school is the diverse range of subjects and extracurricular activities available. I have been able to explore my interests in various fields, from science and mathematics to literature and the arts.
The school offers a multitude of clubs, sports teams, and cultural activities, allowing me to engage in activities that I am passionate about and develop new skills. It's been a joy to meet like-minded individuals who share my enthusiasm and curiosity.
Moreover, the school fosters a warm and inclusive community. The friendships I have made here are invaluable, and the support I receive from my peers and teachers is truly remarkable. The school encourages collaboration, teamwork, and respect for one another, creating a positive and nurturing environment that enhances our learning experience.
Lastly, the school places a strong emphasis on community service and social responsibility. We are encouraged to participate in various community outreach programs, charity events, and environmental initiatives.
In conclusion, I am truly grateful for the opportunities and experiences my school provides. I feel supported, challenged, and inspired every day.Thank you both for your unwavering support and belief in me. I am excited to continue this journey of learning and growth.
With all my love,
[Your Name]
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Which structures are found only in plant cells, not in animal cells?
- [ ] A and B
- [ ] B and C
- [ ] C and D
- [ ] D and A
![Which structures are found only in plant cells, not in animal cells? - [ ] A and B - [ ] B and C - [](https://i5t5.c14.e2-1.dev/c-qa-images/contents/attachments/PiCSguEBfHSrkq42QpcVmEpsuI1tV3Jb.png)
Answers
Answer:
answer is b and c
Explanation:
they have different cells, and chloroplast is only in plant cell
Which of the following statements concerning the blood-brain barrier is FALSE?
a. Penicillin is useless against infections of the brain because it is completely incapable of crossing the barrier.
b. Substances that are lipid-soluble can cross the blood-brain barrier readily.
c. Most antibiotics cannot cross the blood-brain barrier.
d. Inflammation can alter the blood-brain barrier, increasing the likelihood that a substance can cross.
Answers
b. Substances that are lipid-soluble can cross the blood-brain barrier readily. This statement is FALSE.
Substances that are lipid-soluble can indeed cross the blood-brain barrier more easily than substances that are not lipid-soluble. The blood-brain barrier is formed by specialized cells that tightly regulate the passage of substances from the bloodstream into the brain. It is composed of endothelial cells lining the blood vessels in the brain, along with supporting cells called astrocytes.
The blood-brain barrier acts as a selective barrier, allowing certain substances to pass through while restricting others. Lipid-soluble substances, such as oxygen, carbon dioxide, and some drugs, can readily cross the blood-brain barrier through simple diffusion. This is because lipid-soluble molecules can dissolve in the lipid bilayer of the endothelial cells.
On the other hand, substances that are not lipid-soluble, such as many ions and large molecules, face more difficulty in crossing the blood-brain barrier. They require specialized transport mechanisms to facilitate their passage, such as carrier proteins or specific transporters.
Therefore, it is incorrect to say that substances that are lipid-soluble can cross the blood-brain barrier readily. In reality, lipid solubility is one of the factors that contribute to the ability of substances to cross the blood-brain barrier, but it is not the sole determinant.
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Although there are a limited number of amino acids in nature, many different types of proteins can be produced. Which of the following provides the best explanation of this phenomena?
Answers
Answer:
As only 20 different amino acids are found in nature, these substances can provide for the makeup of several different proteins due to the various combinations that can be formed with these amino acids. Not only are there a total of 64 codons that our bodies can make, but scientists claim that over a total of 20,000 different types of proteins can be formed from the amino acids & their various arrangement patterns.
Explanation:
Why do you think pigs have similar endocrine glands to humans? Do you think
fish have similar endocrine glands to humans? Why or why not?
Answers
Answer:
Pigs have similar endocrine glands (such as the pituitary gland, pancreas, and adrenal gland) to humans because they are both mammals, and share many common biological similarities, including a complex nervous system, respiratory system, and cardiovascular system. This similarity also extends to their hormone systems.
On the other hand, fish do have endocrine glands, but they are not necessarily similar to those found in humans. Fish have a completely different set of hormones, and their endocrine glands serve very different functions than those found in humans. While some hormones may be similar between fish and humans, their endocrine systems are too distinct for a direct comparison.
PLEASE HELP
What is a limiting layer and what does it prevent?
Answers
Answer:
The lower limit of the zone of suitable soil is defined as the limiting zone. The limiting zone is any layer that prevents proper treatment of wastewater. Such a layer causes very slow (or very fast) movement of water through the soil profile
may this help u
1. International environmental agreements include
a. The Montreal Protocol
b.
Earth Day
C.
The World Trade Organization
d. The Wilderness Act of 1964
Answers
Answer:
A, The Montreal Protocol
Explanation:
The Montreal Protocol is an international agreement aimed at protecting the Ozone layer, agreed upon in 1987!
8) in peas, yellow seed (e) is dominant over green seed (e), and round seed (r) is dominant over wrinkled seed (r). if a pure-breeding round yellow seed producing plant is crossed with a pure-breeding wrinkled green seed producing plant, what genotype(s) and phenotype(s) would you expect in the f1 generation? if you cross the f1 plants, what phenotype(s) would you expect in the f2 generations? use a punnett square to illustrate your answers.
Answers
While the other parent has the homozygous recessive genotype, one parent has the homozygous dominant genotype. All of the offspring in the F1 generation share the same heterozygous genotype and dominant phenotype.
What phenotypes could you expect in the f2 generation if you crossed the f1 plants?F1 generation plants are let to freely breed with one another to produce F2. The plants from the F2 generation will grow tall and slender in a 3:1 ratio. However, not all tall plants share the same genotype. There will be a 2:1 ratio between tall homozygotes and tall heterozygotes.
Which phenotype will the F1 generation exhibit?What are the F1 generation's genotype and phenotype? Round and yellow seeds are the F1 generation's trait and the genotype is RrYy.
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PLEASE HELP ASAP!! NEED THIS DONE FAST.. 35 POINTS. Darwin explored the Galapagos Islands and observed variations of certain species. For example, he saw that the mockingbirds on three different islands were distinct, but still similar to the mockingbirds found on the mainland. The level of diversity in an ecosystem can be determined by the frequency of speciation and extinction. If the mockingbirds became extinct, explain how the newly available niches could lead to speciation.
Answers
Answer:
The different genes that were expressed gave a advantage and disadvantage to certain finches. The ones least capable of surviving with their traits became extinct over time, and the other ones survived, bringing numerous new traits and advantages to the finches, changing them completely. Sometimes, finches can mate with other finches, giving them different traits and survival advantages and disadvantages.
Speciation is the process of creating new species of plants or animals from the old ones. The newly available mockingbird is the result of breeding of the mockingbird to other species on another island, which creates new species.
What is speciation?
Speciation is when a new species of plant or animal creates within the old species. Speciation occurs when an organism of a species goes to another place to live and create different characters and when this species breed with old species a new species develops.
Thus, the newly available mockingbird was produced by mating the original mockingbird with another species on a different island, which results in the creation of new species.
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