Answer:
5' CAT
Explanation:
The template strand is also known as the coding strand which runs in the 3' to 5' direction as the mRNA is synthesized in the 5' to 3' direction.
In this case the 5' AUG on the mRNA is complementary to the 5'CAU on the methionine tRNA.
This 5' CAU corresponds to the 5' CAT on the template strand of the DNA sequence. This is in reverse to the 5' AUG due to the direction of mRNA synthesis.
Darwin observed that finches’ _______ were specialized according to their unique environments.
Answer:
Beaks
Explanation:
Penn Foster
hope this answer is correct
Answer:
1. beaks
2. uniformitarianism
3. competition
4. Hutton was the first scientist to propose that the earth is several million years older than originally believed.
5. Nature is really good at establishing measures of population control when the demand for resources outstrips the supply. Disease and starvation increase to help reduce or limit the population.
6. Darwin applied the concept of uniformitarianism to biology and natural selection through a focus on constant small changes.
7. This suggests that round-winged flies are more fit in their local environment.
8. The geological processes responsible for changes in the earth several million years ago are similar to the geological processes changing the earth now, often in ways not immediately apparent. This is known as uniformitarianism.
Explanation:
pen
A strain of E. coli carries a mutation that completely inactivates the enzyme encoded in the gene. Several revertants, mutants of the mutant with partly or fully restored activity, were selected, and the amino acid sequence of the enzyme was determined. The only differences found were at position 10 in the polypeptide chain.
Revertant 1 had Thr.
Revertant 2 had Glu.
Revertant 3 had Met.
Revertant 4 had Arg.
Assume that the initial mutation itself, as well as each revertant, resulted from a single nucleotide substitution.
a. What amino acid is present at position 10 in the mutant protein?
b. What codon in the mRNA would encode this amino acid?
Answer:
The correct answer is - a) Lys b) AAG
Explanation:
As mention in question that whatever mutation took place was single nucleotide substitution which changes the complete amino acid here what one can do is he can analyze all 64 codons which code for different amino acids to find out.
Revertant 3 which had methionine in the 64 codons one codon codes for methionine which is AUG so we will search for most similar and found that-
Threonine = ACG
Glutamate = GAG
Arginine = AGG
Methionine = AUG
Lysine = AAG
In the mutant protein most possible amino acid present could be lysine as lysine coded by AAG in E.coli and if we do point mutation in the codon of lysine we can get all other four codon for given revertants :
AAG= lysine if second nucleotide converted to C so it will become ACG and will code for threonine as in Revertant 1.
AAG= lysine if first nucleotide converted to G - become GAG and will code for Glutamate as in Revertant 2.
AAG =lysine if second nucleotide converted to U - AUG and will code for methionine as in Revertant 3.
AAG= lysine if second nucleotide converted to G - AGG and will code for arginine as in Revertant 4.
So, lysine codon AAG is the only position in the genetic code that can, in one step, mutate to either Thr, Glu, Met, or Arg.
Thus, the correct answer is - a) Lys b) AAG
Select the accurate statement(s) regarding the divisions of the nervous system.
A. The sympathetic division tends to arouse the body for action.
B. The sympathetic division tends to arouse the body for action.
C. The visceral motor division (autonomic nervous system) carries signals to glands, skeletal muscle, and smooth muscle.
The given question is incomplete as there is an option twice and other options are not provided. however, the complete option for the question is as follow:
a) the sympathetic division tends to arouse the body for action.
b) the visceral motor division(ANS) carries signals to glands, skeletal muscle, and smooth muscle.
c) the somatic motor division carries signals to the somas of the neurons.
d) the parasympathetic division tends to have a calming effect.
e) the CNS has both a sensory and motor division.
Answer:
The correct statements are -
a) the sympathetic division tends to arouse the body for action.
d) the parasympathetic division tends to have a calming effect.
Explanation:
The sympathetic division regulates organs and glands during crises. It helps the body in crisis to act on the basis of fight or flight. For instance, it builds the pulse and the progression of blood supply to the legs, so you can flee from risk.
The parasympathetic sensory system is liable for the body's rest and processing reaction when the body is loose, resting, or taking care of. It essentially fixes the work does by sympathetic division after an unpleasant circumstance.
Thus, the correct statements are -
a) the sympathetic division tends to arouse the body for action.
d) the parasympathetic division tends to have a calming effect.
Construct the sequence of events leading from a dietary vitamin C deficiency to symptoms such as bruising and breakdown of supporting tissues.
1. tissue levels of ascorbic acid is low
2. enzyme prolyl hydroxylase is inactive
3. proline is not hydroxylated
4. the triple helix is inadequately stabilized .
5. collagen breaks down
6. defects in tissues that depend on collagen
7. tissues that depend on collagen are subject to breakdown and bruising
Answer:
1. the levels of ascorbic acid in the tissues are low
2. the enzyme prolyl hydroxylase is inactive
3. proline is not hydroxylated
4. The triple helix is inadequately stabilized.
5. collagen breaks down
6. collagen-dependent tissue defects
7. Collagen-dependent tissues are subject to breakdown and bruising
Explanation:
Vitamin C deficiency or vitamin C hypovitaminosis generates an oatology called scurvy, in this pathology there are tendon problems and fragility at the tissue and vascular level.
This is because of the low antiquity of vitamin c that is necessary for the correct synthesis of collagen, the collagen helices formed by the fibroblast are considered of poor quality and thus do not fulfill the function of support, containment and body in the tissues.
Vessels are highly contained by collagen and tissues as well, which is why hematomas appear due to vessel rupture and blood exacerbation in the extracapillary medium.
write the name of 5 plants that reproduce by stem?
Answer:They are
Ginger
Potato
Basil
Rosemary
Lavender
Explanation:Feel pleasure to help u...
Answer:
Onions , ginger, gladiolus, common ivy, dahlia
Explanation:
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The architecture of the right and left ventricles is very similar. However, the moderator (septomarginal) band is a structure unique to the right ventricle. Which of the following is true of the moderator band?
1. It conveys the marginal artery
2. It is the component of the fibrous skeleton of the heart.
3. It anchors the septal cusp of the tricuspid valve.
4. It conveys the right branch of the atriventricular bundle.
5. It enters the enterior cusp of the pulmonary valve.
Answer:
Number 4
Explanation:
4. It conveys the right branch of the atriventricular bundle.
This part of the heart is found in the right ventricle and it is important because it carries part of the right bundle branch of the atriventricular bundle of the conduction system of the heart to the anterior papillary muscle and it is also used by radiologists etc to easily identify the right ventricle.
Which statement below can NOT be used
when describing volume?
A. Volume is the amount of space that an object occupies.
B. The volume of an object is the same as the weight of that
object.
C. Volume can be measured in cubic centimeters.
D. Volume is calculated using a formula: V = 1xwxh.
Match the climate zones to their relative tempature levels
The answers are Polar zones - coldest zone; temperate zones-moderate temperature zone; and tropical zones - hottest zone
Explanation:
One factor that influences the temperature is the latitude or location of places north or south from the Equator line (imaginary line that divides the Earth in North and South). In this way, zones in the equator line and near it that belong to tropical zones are the hottest, this is because due to the tilt of Earth they are more directly exposed to sunlight. On the contrary, zones in the poles that are far from the Equator have low temperatures and are the coldest zones on Earth because they are not highly exposed to sunlight. Additionally, temperate zones that are placed between the equator, and the poles have moderate temperature that is not as cold as in the poles or as hot as in the tropical zones.
Match the correct secretion with its organ of origin and/or its function.
a. This secretion is produced by the liver and stored in the gallbladder.
b. Secreted by the pancreas, this enzyme acts to digest proteins
c. This secretion acts to emulsity fats
d. This enzyme is secreted by the pancreas and acts to digest lipids.
e. This enzyme is secreted by the pancreas and acts to digest carbohydrates.
1. Bile
2. Pancreatic Lipase
3. Pancreatic Amylase
4. Bicarbonate
5. Proteases
Answer:
A,C- bile.
The bile salts participates in the processes of fat digestions,it emulsify fats to micelle.It coats this so that lipase enzyme action on it will be faster.
D-Pancreatic Lipase.This is the enzyme that catalysis the hydrolysis of lipds.it catalysis this to fatty acids and glycerol, for easy absorption in the lacteal.
E- Pancreatic Amylase- this is the enzyme present in saliva. It catalysis the hydrolysis of starch to maltose.This is the first step in the starch digestion.
B-Proteases. This catalysis the breakdown of protein(proteolysis) to amino acids.This occur by acting on the peptide bonds among the amino acids units in protein molecules.This ensure the hydrolysis of protein into smaller units amino acids.
Explanation:
Limited clinical trials are an example of translational research.
True
False
Vesicles:
-are transport compartments that can move particles into or out of a cell
-are surrounded by plasma membranes
-O are created by and are part of the endomembrane system or are created at the cellular membrane
-all of these
-O none of these
23
Answer:
all of these
Explanation:
Certain molecules like proteins and lipids are synthesized by organnelles in a cell. These molecules are transported by small membrane enclosed sacs in a cell called VESICLES.
Vesicles are small enclosures surrounded by a membrane made of lipid bilayer. This membrane separates them from the cytoplasm of the cell. They function as transport compartments that move particles in and out of the cell.
Vesicles are produced by some organnelles that make-up the Endomembrane system like Endoplasmic Reticulum, Golgi apparatus etc. while other vesicles are created as a result of endocytosis by the cell membrane. Vesicles can serve as secretory vesicles or transport vesicles etc.
Estrogens from the vesicular follicle trigger an LH surge from the anterior pituitary. This is an example of: Estrogens from the vesicular follicle trigger an LH surge from the anterior pituitary. This is an example of: negative feedback first tier of control positive feedback fourth tier of control
Answer:
The correct answer is: positive feedback.
Explanation:
Positive and negative feedback are terms that are used to define the way a system is regulated by its products. For example, when the production of a certain substance inhibits its producer that is called negative feedback. On the other hand, when a substance stimulates its producer to keep secreting said substance, this is called positive feedback.
Estrogen is a hormone of great importance in the female reproductive cycle and is secreted by the follicle cells in response to the presence of FSH (follicle-stimulating hormone), released by the anterior pituitary when stimulated by the GnRH (gonadotropin-releasing hormone).
Estrogen appears at the beginning of the cycle to stimulate the development of the ovarian follicles, and the hormone levels continue to rise as the cycle advances. Up until the 14th day of the cycle, estrogen has a negative feedback on GnRH and FSH, but then it makes an abrupt change to now exert positive feedback on GnRH to stimulate the release of LH (luteinizing hormone), which will be responsible for ovulation.
The immune system responds to the damage to arteries because of atherosclerosis by: a. destroying foam cells that capture and remove LDL from the artery wall b. promoting the growth of skeletal muscle cells of the artery wall to repair the site c. sending white blood cells to the site to try repair the damage d. reducing the concentration of clotting factors in the blood e. lining the arteries with high levels of HDL cholesterol
Answer:
The correct answer is option C.sending white blood cells to the site to try to repair the damaged
Explanation:
Atherosclerosis is a disease where plaque develops inside arteries. Arteries are vessels that convey oxygen-rich blood to your heart and different regions of your body. Plaque is comprised of fat, cholesterol, calcium, and different substances found in the blood. After some time, plaque solidifies and limits your supply routes.
The immune system responds to Atherosclerosis that causes damage to the arteries by sending white blood cells to the damaged site to fix the damage caused by the plaques and fat deposits that obstruct the blood supply.
The immune system responds to the damage to arteries because of atherosclerosis by C. sending white blood cells to the site to try repair the damage.
The immune system is the process that is important for resistance against diseases and fighting infection. It defends our body against invaders such as bacteria, viruses, etc.
It should be noted that the immune system responds to the damage to arteries because of atherosclerosis by sending white blood cells to the site so that the damage will be repaired.
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name 3 important features of blood in your body
Answer:
1. Red blood cells for transportation of oxygen and carbon dioxide in and out the body.
2. White blood cells for fighting against harmful substances in the blood stream.
3. Blood platelets for blood clot during an injury.
Explanation:
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Left-sided heart failure is characterized by
Answer:
Left-sided heart failure is a heart condition where the muscle on the left side of the heart is diminished and the pump doesn't work to the body. Left-sided heart failure is defined not as a disease, but a process.
Symptoms:
Left-sided heart failure. Fluid may back up in your lungs, causing shortness of breath. Right-sided heart failure. Fluid may back up into your abdomen, legs and feet, causing swelling. Systolic heart failure.
Explanation:
Which best describes what happens to ATP during photosynthesis?
A. ATP is produced and then used to produce glucose.
B. ATP is broken down and then not used again.
C. ATP is formed and remains unchanged in the chloroplast.
D. ATP is changed to ADP and then moved to the cytoplasm
A. ATP is produced and then used to produce glucose.
ATP is produced in the light-dependent reactions and used in Calvin's cycle for glucose synthesis
Answer:
A) ATP is produced and then used to produce glucose.
Explanation:
Took the test edge2021
The term heterochromatin refers to heavily condensed regions of chromosomes that are largely devoid of genes. Since few genes exist there, these regions almost never decondense for transcription. At what point during the cell cycle would expect to observe decondensation of heterochromatic regions? Why?
Answer:
The correct answer is: S phase.
Explanation:
DNA can be divided into two functional forms: heterochromatin and euchromatin. Heterochromatin refers to the DNA that doesn't code for proteins or RNA, and thus it remains heavily condensed, for there would be no use to use it for transcription or translation. Euchromatin, on the other hand. is the DNA with the genes that can be transcripted into RNA and translated into proteins; for this reason, Euchromatin is less compact than Heterochromatin.
The only point in the cell cycle where Heterochromatin would be decondensed is S phase because, in this part of the cell cycle, the DNA gets replicated in order to prepare for Mitosis. For DNA to be replicated, it first needs to be decondensed to their two strands can be separated and used as guides for the synthesis of the two new strands.
You perform an experiment in which you take 16 pots of strawberry plants and give half of them 1 gm of ammonium nitrate per liter of water and the other half receive only water. Each group is then split in half again, and exposed to either 8 or 16 hours of light each day. You monitor the height of the plants for 4 weeks. You observe that plants grown in ammonium nitrate and 16 hours of light grow taller than no ammonium nitrate and 8 hours of light.
The reason for the uptake by plants of nutrients like ammonium nitrate is
asexual reproduction.
homeostasis.
evolution.
sexual reproduction.
natural selection
Answer:
homeostasis.
Explanation:
Homeostasis is the process whereby living systems maintain a stable internal environment despite changes in environmental conditions. Plants, like every other living organisms also perform this process to keep their internal environment in a stable state.
According to the question, some plants were exposed to ammonium nitrate, which serves as a nutrient, and 16 hours of sunlight needed for photosynthesis to take place. The plants exposed to ammonium nitrate and 16 hours sunlight grew taller because they had access to nutrients needed to bring about the process of photosynthesis, which provides the plant with energy source (Glucose).
The uptake of nutrients like ammonium nitrate by the plants is done in order to maintain a homeostatic internal environment. Without nutrients, which is the purpose of the ammonium nitrate, plants cannot grow. Hence, the plants exposed to ammonium nitrate, take it in to keep their internal environment functioning.
Translation in bacterial and eukaryotic cells has many similarities, but there are also several key differences. Which of the following is one of those differences that is seen in eukaryotes?
a. Translation and transcription are coupled.
b. Eukaryotic ribosomes are smaller with fewer proteins and RNA molecules.
c. Eukaryotes use the 5′ G-cap and Poly-A-tail on their mRNAs to initiate translation.
d. Eukartyotic mRNA contains a Shine—Dalgarno sequence that increases the efficiency of translation.
Answer:
The correct answer is B and C
sorry if incorrect
The statement 'eukaryotes use the 5′ G-cap and Poly-A-tail on their mRNAs to initiate translation' correctly describes one difference observed in eukaryotic and prokaryotic cells (Option c).
In eukaryotes, the 5′ G-cap on the 5′ end of a messenger RNA (mRNA) molecule is a Guanine nucleotide linked to mRNA trough 5′-5′ triphosphate linkage.The poly Adenine tail (poly-A-tail) is a long sequence composed of repeated Adenine nucleotides in the 3' end of the mRNA.Both 5′ cap and the poly-A-tail act to protect the mRNA transcript from exonuclease (enzymatic) degradation and initiate translation.In conclusion, the statement 'eukaryotes use the 5′ G-cap and Poly-A-tail on their mRNAs to initiate translation' correctly describes one difference observed in eukaryotic and prokaryotic cells (Option c).
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Write down the oxygen requirements of the microorganisms growing in thioglycolate tube.
Answer:
Obligate aerobic microbes requires oxygen for its survival in the thioglycolate tube while Obligate anaerobic microbes does not requires oxygen.
Explanation:
Thioglycolate tube is a tube which is used to determine the oxygen requirement of different types of microbes. The concentration of oxygen is higher in the upper portion of the tube while in the lower portion, the concentration of oxygen is the lowest. So those microbes who needs oxygen for their survival will be present in the upper portion of the tube while those microbes who does not need oxygen, will be present at the bottom of the tube.
In the large intestine material is stored how many
hours prior to elimination?
Explanation:
After you eat, it takes about six to eight hours for food to pass through your stomach and small intestine. Food then enters your large intestine (colon) for further digestion, absorption of water and, finally, elimination of undigested food. It takes about 36 hours for food to move through the entire colon.
Two of these answers are mixed up and I need help to figure out which two those are
The sternum is anterior/ventral to the vertebrae.
The feet are inferior to the hands.
The elbows are lateral to the abdomen.
The skin is superficial to the skeleton.
The heart is posterior/dorsal to the sternum.
The lungs are deep to the ribs.
The chest is superior to the abdomen.
The knee is distal to the hip.
The fingers are medial to the thumb.
The elbow is proximal to the wrist.
The answers i have in italics are what i chose. it tells me i have two wrong and i can't figure out which two need switched.
Answer:
The correct answers are "The heart is posterior/dorsal to the sternum" and "The lungs are deep to the ribs".
Explanation:
It is not true that the heart is posterior/dorsal to the sternum. Actually, it is considered that the heart is deep to the sternum, as well as the aorta, vena cava, and thymus gland. On the other hand, the lungs are posterior/dorsal to the ribs. The lungs are located in the thoracic cavity, which is extending anteriorly and laterally to the ribs.
a smoker develops damage to several alveoli that can no longer function. how does this affect gas exchange?
Answer:
Smoking causes the hardening of the alveoli walls. This keeps them from extending or stretching out because of the loss of elasticity. In such a circumstance, it is hard to take up oxygen from the inspired air or to remove carbon dioxide from the circulation system. This would prompt partial or less trapping of the gases in the lungs.
With this damage due to smoking, the alveoli can not assist the bronchial tubes enough. The tubes also get damaged and cause a blockage or obstruction, which traps air inside the lungs. An excess of air caught in the lungs can give a few patients a barrel-chested appearance.
What structure is found mostly in green plant cells but not in animals
Answer:
The answer is Chloroplast.
Explanation:
Chloroplast is a structure in green plant cells which contain a substance called chlorophyll which give plant leaves their green color.
Hope this helps you
why standard units neeeded
Answer:Because it is scientific and gives accurate results as well as accepted by the world.
Explanation:
Feel pleasure to help u...
in a flowering pot, tall is dominant to short, and blue flowers is dominant to white flowers. The top with white flowers is crossed with a short plant with blue flowers. What is the chance that the offspring will be short with white flowers?
Answer:
There is a 0% chance that the offspring will be both short and white flowers.
Explanation:
For this we are going to go in and use the Punnett squares. Let´s identify the dominant and recessive genes.
Tall Flowers are Dominant - T(capital for dominance)
Short Flowers are Recessive - t(lowercase for recessiveness)
Blue Flowers are Dominant - W(Capital for dominance)
White Flowers are Recessive - w(Lowercase for recessiveness)
Let´s set up our chart with the information that we have. Its easy to draw the chart, but we need to understand the genes, and make sure that everything is okay!
There is a picture that I took of the chart on the bottom of the page. You can see the dominance of the Tall gene, and the Dominance of the Blue gene. Because none of the offspring have a chance of being short of white, that makes it impossible to have a percentage any higher than 0%.
UNLESS there is a clear mishap or genetically mutated gene in the flower. We never know! I really hope this helped!
Drag the tiles to the correct boxes to complete the pairs. Match the organisms to the descriptions.
Answer:
Ok, no boxes but whatever
Mammals - Endothermic Homeostasis (Warm Blooded), Hairy Body, Have babies live
Birds - Endothermic Homeostasis(Warm Blooded), Have eggs, feathers, claws
Bacteria - Single celled, use binary fission to divide
Fungi - Multi or single celled, have chitin cellular walls
Plants - Have cellulose plant walls, multicellular organism
Archae Bacteria - Same as normal, except they live in crazy enviorments, like at the bottom of the ocean or in a volcano or radiation pool
Protozoa - Single celled organism class, like ameoba
Answer:
If this was edmentum. this was my question and answer
Explanation:
see pic below
Schilders disease is a progressive degeneration of the central nervous system that leads to death by age 2. The disease is caused by a simple autosomal recessive mutation. A couple loses its first two children to Schilders disease. If they decide to have a third child, what is the probability that it will have the disease
Answer:
The probability will be 25% (1/4)
Explanation:
Schilder's syndrome is a degenerative and progressive lethal disease caused by the demyelination of nerve cells in the brain and spinal cord. Since it is a lethal recessive autosomal disease, both the father and the mother have a single copy of the mutant allele, thereby the probability of obtaining a lethal combination will be:
SN X SN >>
1/2 x 1/2 = 1/4 = 25%
where N and S are normal and lethal alleles, respectivelyvely
Define and compare four level of protein organization.
Explanation:
There are four levels of protein structure: primary, secondary, tertiary, and quaternary. These levels also reflect their temporal sequence. Proteins are synthesized as a primary sequence and then fold into secondary → tertiary → and quaternary structures.
The discovery of RNA interference (RNAi) led to its use in biotechnology and medicine. All of the following are examples of how RNAi could be used in biotechnology or medicine, EXCEPT ________.
a. to treat a disease characterized by a gene that is not expressed.
b. to study loss-of-function phenotypes of specific genes in a model research organism.
c. to treat a disease characterized by the buildup of a specific protein.
d. to treat a disease characterized by the overexpression of a nonmutated gene.
e. to treat a disease characterized by the normal expression of a mutated gene
Answer:
a. to treat a disease characterized by a gene that is not expressed.
Explanation:
The RNA interference (RNAi) technique is widely used in molecular biology to inhibit target gene expression at the post-transcriptional level. The RNAi technology uses small interfering RNAs (siRNAs) consisting of 18-22 nucleotides that bind to complementary acid nucleics (i.e., DNA and RNA), thereby inhibiting target gene expression. Recently, it has interestingly been discovered that small RNA sequences targeting promoter regions can also be used to activate the expression of endogenous target genes through a mechanism called RNA activation (RNAa).