All cells require a nitrogen source to grow. The preferred nitrogen source for E. coli is an ammonium salt (e.g. NH4Cl ). The NH 4 is assimilated into cellular metabolism by glutamine synthetase (GS), which catalyzes the synthesis of glutamine from glutamate, NH 4, and ATP. Glutamine then serves as a precursor to many compounds such as histidine, tryptophan, and nucleotides. These compounds control the activity of GS by feedback inhibition. Therefore, GS responds to changes in the nitrogen balance within cells. Identify the correct feedback inhibition mechanism that controls GS and its advantage for E. coli grown in a medium with a high histidine concentration. Assume that glucose and NH, are not limiting.
A. GS is controlled by concerted feedback inhibition. Histidine alone does not alleci GS. Therefore. E. coli growth will be unaffected.
B. GS is controlled by sequential feedback inhibition. Complete inhibition of GS by histidine will impair NH+ assimilation and impair E. coli growth.
C. GS is controlled by cumulative feedback inhibition. Therefore, histidine will inhibit GS partially. The remaining GS activity can support NH+, assimilation and E. coli growth.
D. GS is controlled by enzyme multiplicity. Only histidine-responsive GS will be shut down. The other GS isoforms will remain active to support E. coli growth.
Answer:
C.
Explanation:
The glutamine Synthetase of E. coli can collectively and totally be hindered and inhibited by various and numerous nitrogen-containing compounds like histidine, tryptophan, glycine, alanine, etc at optimum concentrations. But, individually at higher concentrations, these inhibitors can only inhibit the catalytic enzyme action partially. In this way, GS is constrained by total feedback restraint. Consequently, histidine will repress GS halfway. The excess GS movement can uphold NH+, absorption, and E. coli growth development.
Which climate is best for supporting both plant and animal life? A.Tropical Rainforest B. Tundra C. Temperate Deciduous forest D. Desert E. Savanna F. Taiga
Deciduous forests, it holds both plant life and animals that thrives extremly well.
What is some evidence that makes plate tectonics is such a firmly believed idea?
Answer:
There are many shreds of evidence that support the theory of plate tectonics and make it such a firmly believed idea. These pieces of evidence include fossils, glaciers, earthquakes and volcanic activity, the shape of continents, the magnetism of rocks on the seafloor, the mid-ocean ridge system, and others.
Fossils give an idea of the location of the plants and animals that once existed. Earthquakes and volcanic activity also help in determining the cause of the boundaries and rifts formed. The shape of the continents seems to be fit with one other that gives the idea that these were together and moved away from each other.
A person undergoes hypnosis, and her hand is put in ice. She does not show signs of being in pain. Which of these statements is consistent with the dissociation theory? O A. "My hand is not in ice." O B. "There is no ice." O c. "I do not want the hypnotist to know I feel pain." O D. 'I know my hand is in ice, but I cannot feel any pain."
Answer:D) I know my hand is in ice but I cannot feel any pain
Explanation:
I took the quiz
What season is occurring within the northern hemisphere in the image below?
Answer:
Winter
Explanation:
HELP WILL GIVE BRAINLIEST
Answer:
What are you talking about?
Explanation:
What
Which best describes the white light in the visible light spectrum?
А
a mixture of every wavelength and color of visible light
B
a mixture of only seven colors and wavelengths of visible light
С
a mixture of only red, blue, and yellow wavelengths of visible light
D
a mixture of colors that cannot be broken up in the spectrum of visible light
Answer:
B
No explanation required
On the planet Fugus, there is a species of flowers, Dontdrinkmycola, that has two special loci: Bach01 and Bach02. At Bach01, there are two alleles in the population: A (dominant) and a (recessive). Similarly, at locus Bach02, there are two alleles in the population: B (dominant) and b (recessive).
Individuals with the A_ genotype at Bach01 have mauve colored petals, and individuals with the aa genotype have teal colored petals. Likewise, individuals with the B_ genotype at Bach02 have mauve colored petals, and individuals with the bb genotype have teal colored petals.
In a cross between two doubly heterozygous Dontdrinkmycola flowers, the following number of offspring are produced: 280 offspring with mauve colored petals, and 220 teal-colored petals. The most likely form of epistasis here is:
a. Duplicate dominant epistasis.
b. Dominant recessive epistasis.
c. Duplicate recessive epistasis.
d. Recessive epistasis.
e. Dominant epistasis.
Answer:
c. Duplicate recessive epistasis
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
Compare and contrast point mutations and chromosomal mutations. Which part of the organism's DNA is affected as a result of each?
Answer:
In point mutation,the gene is affected however in chromosomal mutations,there is change in the structure or number of the chromosomes
The primary distinction among point mutation and chromosomal mutation is, the point mutation is a small mutation in which basically a single base pair of the either DNA or RNA encoding changes, whereas chromosomal mutation is a large-scale mutation in which the chromosome structure changes.
What is mutation?A mutation is an alteration in an organism's DNA sequence. Mutations can take place as a consequence of mistakes in DNA replication during cell division, mutagen exposure, or viral infection.
Mutagens are environmental factors that results in mutations. Mutagens can be either radiation, chemicals, or infectious agents.
In living organisms, there are two kinds of genetic mutations namely point mutation and chromosomal mutation.
The nucleotide sequences are usually altered in both cases. As a result, all these types of mutations can result in fatal diseases.
The main difference between point mutation and chromosomal mutation is that point mutation is a small-scale mutation that changes a single base pair of the DNA or RNA encoding, whereas chromosomal mutation is a large-scale mutation that changes the chromosome structure.
Thus, this is the comparison between the types of mutation.
For more details regarding mutation, visit:
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What material was used to make shelters in the Stone Age?
Mammmoth bones
Stone
Animal hide
Answer:
Stone
Explanation:
These houses are more like our houses than any others in the Stone Age. They had foundations and they were built of wood and wattle and daub (a mixture of manure, clay, mud and hay stuck to sticks). They were sometimes made of stones. The roofs were made of straw.
Which taxon includes more species, an order or a family?
Answer: order
Explanation:
A woman is admitted to the hospital with Bell's palsy caused by an inflamed facial nerve. You are the attending physician. What symptoms do you observe? How do you test her facial nerve?
Which of the following foods have fiber in them?
Your answer:
Peanuts
Granola
Bananas
All of the above.
Answer:
All of the above.
Explanation:
Bananas, peanuts, and granola are all great sources of fiber.
Hope this helps! :)
PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answer: C
Explanation:
Viruses don't have cell walls that can be attacked by antibiotics; instead they are surrounded by a protective protein coat. Unlike bacteria, which attack your body's cells from the outside, viruses actually move into, live in and make copies of themselves in your body's cells
dandelion flowers at any time after the seeds have germinated and the plants are mature which term best describes this kind of plant ?
Answer:
a non-flowering plant.
Answer:
Believe me it’s day neutral plant.
Explanation:
Have a good day!
When radiometric dating is done on a rock sample, the rock's_____
is determined.
comparative age
relative age
absolute age
sequential age
Answer:
The answer is absolute age hope this help pls give me brainless.
A. Precipitation
B. Evaporation
C. Photosynthesis
D. Commensalism
Answer:
B. evaporation
Explanation:
sorry if its wrong
Answer:
Evaporation because that’s the process in which the liquid turns into a gas
Allie was in the park playing on the equipment. She noticed that on the highest slide, she slides down
A)
without friction.
B)
with the slowest speed.
with the greatest speed.
D)
at about the same speed as the shortest slide.
What will happen if you leave a potato out for a few days?
how many bones has a crocodile?
A crocodile has 250 bones.
Answer:
The average crocodile has 250 bones excluding skull and armor
Explanation:
I searched it up on GOOOGLEE
what does NADP+ want to carry outside of the thylakoids?
Which of the following factors is most likely to decrease the stability of an ecosystem?
Answer:
i couldn't see the list of factors so i included the once i know
Explanation:
species diversity
temproal
foid web structure
Answer:
air polution, global warming, species dying out, and too many people to supply for
Explanation:
Blue-white screening is a technique for the identification of___. It relies on the ability of____to cleave lactose. Blue-white tests take advantage of a molecule called____which is similar to lactose in that it is cleaved by B-galactosidase. When cleaved, the____(same as previous) turns . If uncleaved,meaning a non- function B-gal gene, the X-gal remains____. Therefore, a____bacterial colony means the B-galactosidase gene is not-functional, and therefore there____a recombinant gene inserted into the vector.
You’ve inserted a gene for pesticide resistance into your vector. To see if it was successful, you decide to conduct a blue-white screening test. But, uh-oh you are out of X-gal! You do notice some green Slime-gal sitting on the shelf and recall that this molecule works similarly to X-gal, but instead of turning blue when cleaved, it turns green when cleaved. You carry out the test, and find that all of your colonies are green! Was your insertion of the pesticide gene successful?
Answer:
Explanation:
Blue-white screening is a method for distinguishing proof of (recombinant bacteria). It depends on the capacity of ( B-galactosidase) to separate lactose. Blue-white tests exploit the molecule called (x-gel)_ which is like lactose in that it is severed by B-galactosidase. When separated, the (5-bromo-4-chloro-indoxyl) (same as past) turns _(_blue). In the event that uncleaved, which implies a non-function B-gal gene, the X-gal remains (white)_. Subsequently, a __(white) bacterial province implies the B-galactosidase gene isn't practical, and in this way there ___lacz__ a recombinant gene embedded into the vector.
what products are made from the process of photosynthesis
Answer: glucose and oxygen
Explanation:
The formula for photosynthesis is:
Carbon dioxide+water-->glucose+oxygen
Anything on the right of the arrow is the products so, it is glucose and oxygen.
Hope this helps :)
Answer:
glucose and oxygen
Explanation:
plants need carbon dioxide that human and animal release in order to manufacture food(photosinthesize)
in return,they give is oxygen and glucose from the food it produces
Which of the following happens before a black hole comes into existence?
Answer:
i just took this test its
An old star collapses on itself
Explanation:
Why do some people require bifocals (or even trifocals) as they age?
Answer:
Explanation:
People have to wear bifocals most commonly because of a condition called presbyopia. This condition occurs naturally. It causes difficulties in the eye’s focusing abilities. Bifocals work to help the eyes focus more clearly, which is why people have to get them.
List some of the diseases mentioned that have plagued humans from Egyptian nobles to now.
Answer: Many of the diseases which cause problems in today's society afflicted Egyptian populations. These include tuberculosis, malaria and schistosomiasis.
Explanation:
what are the nitrates is used to make?
Answer:
fertilizers
Explanation:
Plants use nitrates as a supply of nitrogen, which is needed to make proteins for healthy growth. Plants absorb nitrates in water through their roots. Nitrates are present in high levels in plant fertilisers. Without nitrates, the amount of chlorophyll in leaves reduces.
Open Amplify to PM 3.2.5 and read the Article titled "Steno and the Shark".
Read the article a second time and annotate in the spaces below five important
ideas from the article that you notice. State each idea in your own words; do not
copy and paste directly from the article.
Will give Brian list to best answer
What are the five human impacts on the environment? (I would prefer them in point form, but i understand if you cant do that
Answer:
1. pollution
2.climate change
3. misuse of natural resources
4. erosion
5.loss of biodiversity
Explanation:
Answer:
overpopulation, pollution, burning fossil fuels, and deforestation.
Explanation: