in eukaryotes, how can a single gene code for several different proteins?
Answers
Answer:
Gene splicing is a post-transcriptional modification in which a single gene can code for multiple proteins. Gene Splicing is done in eukaryotes, prior to mRNA translation, by the differential inclusion or exclusion of regions of pre-mRNA. Gene splicing is an important source of protein diversity.
Related Questions
Are you a boy or girl because of Mitosis or Meiosis?
Answers
Answer:
boy
Explanation:
What accounts for the differences in the functions and properties of molecules like starches, glycogen, cellulose and chitin?
Answers
Answer:
The difference in their structure gives them different properties and functions
Explanation:
If you're reading the 01.02A Chemistry of Life (Honors) course, go to the section called "Carbohydrates" Then go to the very last part of the section there you will find a sentence that says " They are all polymers made up of hundreds to thousands of glucose molecules bonded together, but the difference in their structures gives them different properties and functions." That's the sentence that I used to respond to this question.
what is a risk of genetically modified organisms
Answers
Answer:
The most notable GMO risks to humans are the potential development of allergens to GM related crops and toxicity from GM crops. However, studies also show GM crops have benefits including the increased nutritional value in foods.
Explanation:
Hope this Helps c:
QUESTION ONE 1.1 HORIZONTAL LANDFORMS Refer to FIGURE 1.1 below showing landforms associated with horizontal strata and answer the following questions. A K 1.1.1 Identify landforms K and L, respectively. 1.1.2 Provide labels for P, Q and R 1.1.3 What type of rocks are associated with basaltic mountains? 1.1.4 How do basaltic plateaus originate 1.1.5 Evaluate the economic importance of horizontal landscapes like the
Answers
Mesa and butte, respectively, are the landforms K and L. Buttes are similar to mesas but have a considerably smaller size and often have a single peak, whereas mesas have flat-topped hills with steep sides.
A plateau, a hill, and a valley are designated as P, Q, and R, respectively. Igneous rocks are related to basaltic mountains. These rocks are created when molten lava is pushed to the surface where it cools and solidifies into a hard, dense substance.
Basaltic lava flows across a considerable region, cools, and solidifies to produce basaltic plateaus. A plateau is produced by the lava, which creates a level, erosion-resistant surface. For industries like agriculture and forestry, horizontal landscapes like the one in Figure 1.1 are crucial.
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Speech sounds are produced when the intrinsic muscles of the larynx pull the vocal cords _____ (together or apart) across the glottis. The vocal cords are then vibrated by _____ air.
Answers
Speech sounds are produced when the intrinsic muscles of the larynx pull the vocal cords together across the glottis. The vocal cords are then vibrated by the passing air.
The vibration of the vocal cords produces a sound wave that resonates in the pharynx, oral cavity, and nasal cavity. Different sounds are created by varying the tension, shape, and size of the vocal cords, as well as the positioning of the articulators (tongue, lips, teeth, and palate) in the oral cavity.
The production of speech sounds is a complex process that requires precise coordination of multiple muscles and structures in the respiratory, phonatory, and articulatory systems. The lungs provide the airflow needed to vibrate the vocal cords, while the larynx regulates the tension and position of the vocal cords. The articulators shape the sound wave into distinct phonemes, which are the basic units of speech sounds. Speech sounds are then combined into words, which convey meaning and allow us to communicate with one another.
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The inability of organisms to evolve anything that could be an advantage reflects _____.
Answers
The inability of organisms to evolve anything that could be an advantage reflects the limits of historical constraints.
Evolutionary constraints are limitations, biases, or restrictions on how adaptive evolution proceeds or turns out. The phrase typically refers to elements that control or direct the course of natural selection. It is not the same as evolutionary stasis (lack of change) or even stasis-causing variables. Stabilizing selection may lead to evolutionary standstill, however externally-driven stabilizing selection is rarely seen as a limitation. All evolution is, broadly speaking, constrained.As a result, populations frequently have a restricted capacity for absolute evolution, meaning that no mutation could possibly cause the lineage to follow a certain evolutionary course.
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How does energy flow in an ecosystem
Answers
Answer:
Energy is passed from organisms at one trophic level or energy level to organisms in the next trophic level. Producers are always the first trophic level, herbivores the second, the carnivores that eat herbivores the third, and so on.Hope this helps you !!
What happens during cell differentiation?
Mutated cells are destroyed.
Cells are organized into organ systems.
Cells become specialized to perform different tasks in the body.
Cells are transformed from one type of cell to another.
Answers
Answer:cells are transformed from one type of cell to another ?
Explanation:
What kind of solar energy reaches Earth after traveling through space?
Answers
Explanation:
All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays. Radiation is one way to transfer heat.
Answer:
solar radiation I'm sure
The base of a pyramid can be any polygon. How many surfaces does a hexagonal pyramid have? Use the drop-down menus to describe the number and shapes of the surfaces. A hexagonal pyramid has a base with 6 sides. The pyramid has a total of Choose. Surfaces. There are Choose. Triangular faces and 1 Choose. Base
Answers
A hexagonal pyramid has 7 surfaces, including 6 triangular faces and 1 base.
The base of a pyramid can be any polygon, and a hexagonal pyramid has a base with 6 sides. Therefore, a hexagonal pyramid has 6 triangular faces that meet at a single point at the top of the pyramid.
Additionally, the pyramid has a base, which is a hexagon. In total, a hexagonal pyramid has 7 surfaces – 6 triangular faces and 1 base.
Each of the triangular faces is identical and equilateral, meaning that all sides are the same length and all angles are the same size.
The base of the pyramid is also an equilateral polygon, with all sides and angles of equal measure. Together, these surfaces make up the structure of the hexagonal pyramid.
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. Semen contains all of the following EXCEPT
a. sperm
b. acidic secretions
c. prostaglandins
d. fructose
e. mucus-rich secretions
Answers
Semen contains all the following except acidic secretions. The correct option is b.
What is semen?When a male is sexually stimulated, the seminal vesicles and prostate gland produce a whitish fluid called seminal fluid, which combines with sperm to form semen.
The seminal vesicle secretes an alkaline fluid containing nutrients for spermatozoa. The prostate gland is located near this point, and its secretion is alkaline to neutralize the vaginal fluids. It also stimulates sperm production.
Therefore, the correct option is b. acidic secretions.
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Read the following and then answer the questions: Jimena was quietly enjoying her lunch when an unexpected knock on the door startled her. She found two people in suits standing on her front porch. They explained they were medical scientists from Columbia University in New York, and they were visiting her to talk about some old blood samples from a transfusion she had back in the 1970s. They showed Jimena a consent form that she had signed. It had allowed scientists to store and study her blood to help advance their medical knowledge. Now she was worried. Did she have some terrible disease? She invited them in and sat down in case the news was bad. The researchers explained that they were part of a team that searches for viruses in old blood transfusion samples. Their work was aimed at finding new transfusion-transmissible viruses that ought to be screened for in the donated blood supply to further protect patients. They were looking at samples from the 1970s because, unlike today, the only virus screened for back then was Hepatitis B. These lightly screened samples might lead to discovery of previously unrecognized viruses. Sadly, lack of broader screening for bloodborne viruses meant that thousands of people were infected with Hepatitis C and human immunodeficiency virus (HIV) by way of contaminated blood transfusions during the 1970s and 1980s. People with hemophilia, a blood-clotting disorder, had an unusually high prevalence of Hepatitis C virus and HIV. This is because managing hemophilia in the 1970s and 1980s often involved administering clotting factors derived from human blood. Before the stricter screening went into effect, at least 6,000 hemophiliacs in the United States are believed to have contracted Hepatitis C from blood transfusions. Of course, hemophiliacs were not the only ones who suffered: Anyone who got a transfusion for any reason at that time was at high risk for exposure to these viruses. In 1976, during her last trimester of pregnancy, Jimena had developed severe anemia. She remembered receiving a blood transfusion a few weeks before she delivered her son, Jose. The transfusion was done to ensure that her blood levels could support both her and her child during delivery. She knew this must have been the reason the doctors were visiting her now. She asked them if they were here to tell her she had HIV or hepatitis––she had been feeling very tired lately, and wondered if this was the cause. The doctors hastened to explain that the blood she received was not infected with Hepatitis C or HIV. But they had found something else: a new virus never seen before in humans. They examined the medical records of all the people who had received blood with this virus, and it did not seem to cause disease. However, they wanted to investigate more. They were here to get a more detailed medical history from Jimena, along with a new blood sample. They also wanted to reach out to Jose, Jimena’s son, and see if he’d be willing to take part in the study, too. Jimena’s eyes became moist as she explained that Jose had died of cancer eight years ago. The doctors expressed their sympathy, but pressed Jimena for the type of cancer he had developed. She said it was liver cancer. "Are you sure we didn’t catch hepatitis C from the transfusion?" she asked the researchers. "I know that can cause liver cancer, right?" "Yes, it can," they replied.
1. How could old samples of donate blood be screened to search for new viruses?
3. How could researchers isolate and grow a particular virus from the Jimenas blood?
Answers
The researchers could isolate and grow a particular virus from Jimena's blood through the following procedure: The process of isolating and growing a particular virus from Jimena's blood is called virus cultivation.
Researchers begin by collecting a blood sample and treating it with a substance that ruptures the host cells while leaving the viral particles intact. After that, they transfer the suspension to a suitable host cell and incubate it. The host cell is used to propagate the virus. If the virus reproduces, it is allowed to infect the host cells. Then the infected cells are checked regularly to see how the virus is doing in the host cell. This enables the researchers to research the virus and take measures to protect people from being infected by it.
Researchers can isolate and grow a particular virus from Jimena's blood by following several steps. First, they would collect a blood sample from Jimena. Next, they would separate the blood components, such as plasma and red and white blood cells, to identify the presence of the virus. Once they have located the virus, they would extract it from the blood sample.
To grow the virus, researchers would then introduce it into a suitable cell culture or host organism, which provides the necessary environment for the virus to reproduce. They would monitor the growth of the virus and collect new viral particles as they are produced. Throughout this process, researchers would ensure the cell culture or host organism is kept under controlled conditions, such as temperature and humidity, to optimize viral replication.
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which protein, acting as a hormone, regulates blood glucose? a. insulin b. thyroxine c. antidiuretic d. oxytocin e. prolactin
Answers
The protein acting as a hormone that regulates blood glucose is a) insulin.
Insulin is a hormone produced by the beta cells of the pancreas and plays a crucial role in regulating blood glucose levels. When blood glucose levels rise, such as after a meal, insulin is released into the bloodstream. Insulin acts on various tissues, particularly the liver, muscle, and adipose (fat) cells, promoting the uptake and storage of glucose. It helps lower blood glucose levels by facilitating the movement of glucose from the bloodstream into these cells, where it is either used for energy or stored as glycogen.
Insulin also suppresses the production of glucose by the liver. In individuals with diabetes, either insufficient insulin is produced (type 1 diabetes) or the body's cells become resistant to the effects of insulin (type 2 diabetes), leading to elevated blood glucose levels. Insulin therapy or other treatments are used to manage and control blood glucose in individuals with diabetes.
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i’ll mark brainliest
explain the sequence of events in the replication of DNA
Answers
Explanation:
Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.
How is DNA replicated?:
Replication occurs in three major steps: the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin. Several enzymes and proteins then work together to prepare, or prime, the strands for duplication. Finally, a special enzyme called DNA polymerase organizes the assembly of the new DNA strands. The following description of this three-stage process applies generally to all cells, but specific variations within the process may occur depending on organism and cell type.
What triggers replication?
A schematic shows a double-stranded DNA molecule undergoing the replication process. The left side of the molecule is double-stranded. In the middle of the molecule, a globular yellow structure, representing the protein helicase, is bound to the ends of several nitrogenous bases on the lower strand. To the right of the helicase protein, the double helix has opened and the top strand has separated from the bottom. At right, a short segment of the newly replicated double-stranded DNA molecule is visible.
Helicase (yellow) unwinds the double helix.
The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands. As the helicase moves along the DNA molecule, it continues breaking these hydrogen bonds and separating the two polynucleotide chains.
A schematic shows a double-stranded DNA molecule undergoing the replication process. At right, the double helix has opened and the top strand has separated from the bottom. A globular yellow structure, representing the protein helicase, is bound to the ends of several nitrogenous bases on the lower strand. A red globular molecule, representing the enzyme primase, is bound to the lower DNA strand to the right of helicase.
While helicase and the initiator protein (not shown) separate the two polynucleotide chains, primase (red) assembles a primer. This primer permits the next step in the replication process.
Meanwhile, as the helicase separates the strands, another enzyme called primase briefly attaches to each strand and assembles a foundation at which replication can begin. This foundation is a short stretch of nucleotides called a prime
In eukaryotic cells, if you compared the DNA sequence of a gene with the sequence of the processedmRNA that was transcribed from the gene you would find
Answers
The DNA sequence of a gene differs from the sequence of the processed mRNA that was transcribed from the gene as it is longer and contains thymine instead of uracil.
What are processed mRNA?Processed mRNA refers to RNA they has been transcribed from a the DNA sequence of a gene.
A processed mRNA has the following differences from the DNA sequence of a gene:
It is relatively shorter It replaces thymidylate with uridylateTherefore, when comparing the DNA sequence of a gene with the sequence of the processed mRNA that was transcribed from the gene, it is longer and contains thymine in place of uracil.
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A 9.0 is how many times more powerful than a
4.0 on the Richter scale?
Answers
Answer:
It increases 31.7 times between whole number
values.
Explanation:
"That is, the wave amplitude in a level 6 earthquake is 10 times greater than in a level 5 earthquake, and the amplitude increases 100 times between a level 7 earthquake and a level 9 earthquake."
the most common microbes that cause foodborne illness in the us are which four of the following?
Answers
The top five bacteria that infect Americans through food are Norovirus, Salmonella, Clostridium perfringens, Campylobacter, and Staphylococcus aureus (Staph).
What is the foodborne illness?Foodborne disease is a widespread, expensive, and occasionally fatal public health issue that is generally preventable.
What causes it?The two most prevalent kinds of foodborne pathogens cause numerous outbreaks and individual episodes of sickness, including:
Salmonella, Listeria, or E. coli are examples of bacteria.Viruses, such as hepatitis A and norovirusWhat are the symptoms?From relatively minor discomfort to really acute, life-threatening illness, symptoms can vary greatly.
Who is in danger?A foodborne illness can affect anyone. However, some people are at a larger risk than others, including those who are pregnant, have young children, are elderly, or have weakened immune systems.
What proportion of food-related diseases are there in us?Every year, according to the Centers for Disease Control and Prevention (CDC), there are approximately 48 million cases of foodborne disease.
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Which of the following foods take the most energy from the
ecosystem to produce?
Group of answer choices
Bread
Pig
Herbivorous Fish
Chicken
Answers
The food that generally takes the most energy from the ecosystem to produce is meat, specifically the B. Pig and D. Chicken.
Meat production requires a significant amount of resources, including land, water, feed, and energy, which contributes to its higher ecological footprint compared to plant-based foods. Raising animals for meat involves multiple steps in the production chain. First, the animals need to be fed, and this requires the cultivation of crops such as grains and soybeans. These crops require land, water, fertilizers, and pesticides for cultivation.
Furthermore, the animals require water for drinking and maintaining their living conditions. The process of raising and managing animals also involves energy consumption for transportation, housing, and processing. In comparison, plant-based foods like Bread and Herbivorous Fish have a lower ecological impact.
By choosing plant-based foods over meat, individuals can contribute to reducing their ecological footprint and promoting more sustainable food production systems. Therefore, Option B and D are correct.
Which of the following foods take the most energy from the
ecosystem to produce? Group of answer choices
A. Bread
B. Pig
C. Herbivorous Fish
D. Chicken
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Which of the following is a type of T cell?
A. Cytotoxic T cell
B. Suppressor T cell
C. Helper T cell
*D. All of the above
Answers
Answer:
yeah its D (all of the above)
Which organelle is the site of cellular respiration, where food is broken down to release
usable energy for the cell?
mitochondria
Chloroplast
Golgi body/apparatus
endoplasmic reticulum
Answers
Answer:
Mitochondria
Explanation:
If ever in doubt, just remember: Mitochondria is the powerhouse of the cell
Plants and green algae have monophyletic lineage. Justify this statement.
I'm waiting for your answer!!
Answers
Answer:
The green algae and land plants form a monophyletic lineage (the chlorophytes) that contains both protistan and higher taxa (Graham, 1996). An important issue regarding the evolution of this green lineage that still remains in question is the identity of the green algal (i.e. flagellate) ancestor of land plants.
Use the following Karyotype to identify any genetic abnormalities in the subject.
A. Inversion mutation
B. Trisomy 21
C. Trisomy 18
D. No abnormalities
Answers
Answer:
D:No abnormalities ...... .............. sorry the words were not enough.......
bcs there are three chromosome in set 21, and we call it down syndrome :)
Islands usually have strange animals because they are isolated.
True
False
Answers
Answer:
true
Explanation:
A 43-year-old Caucasian man with a 20-year history of bipolar disorder presents for the first time with long-term polyuria and polydipsia. He previously took lithium for mood stabilization for 15 years before initiating divalproex sodium therapy. He stopped using lithium because of the polyuria, but he felt that the polyuria never fully subsided. His weight is stable, and he has no other urinary complaints. His blood pressure is 115/80 mmHg and his physical exam is normal. His urinalysis shows no blood, cells, protein, glucose, nitrate, casts, or crystals.
What is the most likely cause of his polyuria?
1 Central diabetes insipidus
2 Nephrogenic diabetes insipidus
3 Polyuria secondary to hyperglycemia
4 Polyuria following acute kidney injury
5 Polyuria secondary to polydipsia
Answers
Answer:
The correct option is 2 Nephrogenic diabetes insipidus.
Explanation:
Nephrogenic diabetes insipidus (NDI) occurs when the renal tubule response to vasopressin (ADH) is weakened, resulting in the excretion of large volumes of dilute urine.
As the renal tubules do not respond to vasopressin (antidiuretic hormone) and are unable to reabsorb filtered water back into the body, the kidneys create a high volume of dilute urine in nephrogenic diabetes insipidus.
Nephrogenic diabetes insipidus (NDI) can be inherited or develop as a result of disorders that impede the ability of the kidneys to concentrate.
Therefore, the correct option is 2 Nephrogenic diabetes insipidus.
That is, the most likely cause of his polyuria is nephrogenic diabetes insipidus.
Can you help me with this question?
Answers
The statement that describes vertebrate species during embryologic development is
They start off very similar but take different developmental paths as they grow; option DWhat are vertebrates?Organisms with an internal backbone, sometimes known as a vertebra, are referred to as vertebrates. They have a robust bone skeleton that anchors muscle and supports the body's tissue. Invertebrates are defined as animals without spines.
Vertebrate species exhibit significant commonalities early in their embryologic development, which is a reflection of their shared heritage.
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What is the best definition of plot? A. Who is in the story B. Where the story takes place C. What is happening in the story D. When the story takes place
Answers
Answer: C. What is happening in the story is the best definition of plot.
Explanation: I hope this helps!
1. A piece of pure gold (Au) has a volume of 50 cmWhat is its mass?
Density of Some Metals
Metal
Density (g/cm3)
Copper
8.96 (g/cm)
Iron
7.87 (g/cm)
Lead
11.36 (g/cm)
Magnesium
1.74 (g/cm)
Silver
10.49 (g/cm)
Zinc
7.13 (g/cm)
A. 0.38 g
B. 2.63 g
C. 69.3 g
D.950 g
Answers
Answer:
96.5g
Explanation:
Given parameters:
Volume of Au = 50cm³
Density of Au = 19.3 g/cm³
Unknown:
Mass of the gold = ?
Solution:
Density is the mass per unit volume of a compound.
Density = \(\frac{mass}{volume}\)
Mass = density x volume
Insert the parameters and solve;
Mass = 19.3 g/cm³ x 50cm³ = 96.5g
Which is calcium dependent? GAP JunctionDesmosome (Maculae adherens)Adherens Junction (Zonulae adherens)Tight Junction (Zonulae occludens)
Answers
Adherens Junctions are calcium dependent junction.
The correct option is (C) Adherens Junction
Adherens junctions: What are they?Cell-cell adhesion complexes known as adherens junctions (AJs) allow cells within a tissue to respond to pressures, biochemical cues, and structural changes in their surroundings. AJs are constantly created and destroyed. Over a set of specified processes, such as initiation, cadherin recruitment, and the recruitment of plaque proteins, the creation and operation of the adherens junction may be explained. As migratory cells first come into contact with one another to create a tissue, for example, adherens junction assembly takes place. It can also happen in pre-existing tissues when cells divide, alter shape, or move in response to pharmacological or mechanical stimuli.Learn more about the Adherens junctions with the help of the given link:
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nematodes are roundworms that can "thrash and wiggle" because circular muscles contract when longitudinal muscles relax and vice versa in waves of peristalsis.
true
false
Answers
Nematodes are roundworms that can "thrash and wiggle" because circular muscles contract when longitudinal muscles relax and vice versa in waves of peristalsis. The statement is True.
Nematodes are roundworms that can move by contracting their muscles in a wave-like motion called peristalsis. The circular muscles contract while the longitudinal muscles relax, which causes the body to shorten.
Then, the longitudinal muscles contract while the circular muscles relax, which causes the body to lengthen. This alternating contraction and relaxation of the muscles propels the nematode forward.
The nematode's body is covered in a thick cuticle that helps to protect it from injury. The cuticle is also flexible, which allows the nematode to bend and twist as it moves.
Nematodes are found in a variety of habitats, including soil, water, and the digestive tracts of animals. They are an important part of the food chain and play a role in decomposition and nutrient cycling. Some nematodes are also parasites that can cause disease in plants and animals.
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"Yuck!" This statement represents which of the following functions of language? (2 points)
Group of answer choices
Phatic
Conative
Emotive
Poetic
Answers
Answer:
C) Emotive
Explanation:
I just took the test now :))
Emotive statement represents the functions of language.
What do you mean by emotive language?Emotive language is the use of descriptive words, often adjectives, that can show the reader how an author or character feels about something, evoke an emotional response from the reader, and persuade the reader of something.
Emotive language refers to language designed to target an emotion – positive, negative, sometimes deliberately neutral – and to make the audience respond on an emotional level to the idea or issue being presented.
Emotive language is an extremely important technique in creating audience engagement with a text. Also called 'loaded language', emotive language occurs when authors choose words extremely carefully to evoke specific emotional responses in a reader.
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