The Arg genes that encode the enzymes for arginine biosynthesis are located at several positions around the genome of E.coli, and they are regulated coordinately by a transcription regulator encoded by the ArgR gene. The activity of the Arg R protein is modulated by arginine. Upon binding arginine, ArgR alters its conformation, dramatically changing its affinity for the DNA sequences in the promoters of the genes for the arginine biosynthesis. A. Given that ArgR is a repressor protein, would you expect that ArgR would bind more tightly or less tightly to the DNA sequences when arginine is absent?

Answers

Answer 1

Solution :

The Arg genes is used to synthesize the arginine. Arginine is chemical building block. It is very important and is used by our body to make the proteins for our body. When the Arg ID is abundant, the expression for the biosynthetic genes must turned off. And if the ArgR behaves as the gene repressor, then the binding of the arginine increases the infinity for the regulatory sites, and allows it to the bind and then shut off the expression of the genes.

If the ArgR acts as the gene activator, then the binding of the arginine would be predicted to reduce the affinity for the regulatory DNA, and preventing the binding and the shutting off the expression for the Arg genes.


Related Questions

A testcross of AaBb gives 10% aaBb progeny. What percentage of the progeny will be Ab/ab or ab/ab if the same plant is self-fertilized

Answers

Answer: Ab/ab (or Aabb) = 12.5%

aabb (or ab/ab) = 0.625%

Explanation:

Due to some error on the page, the answer to this question has been attached in a file.

If there were 1176 seeds collected, predict how many would be axial?
Predict how many seeds would be homozygous dominant?
homozygous recessive:
terminal?
heterozygous?

Answers

According to the given that actual flower position is dominant over terminal flower.

What is a homozygous dominant plant?

When an organism possesses two copies of the same dominant allele, it is said to be homozygous dominant, and when it possesses two copies of the same recessive gene, it is said to be homozygous recessive.

When an organism is homozygous, it contains two copies of the same allele for a gene. When two copies of the same dominant allele or two copies of the same recessive allele are present in an organism, it is said to be homozygous dominant or homozygous recessive.

When an organism is heterozygous, it has two distinct alleles of the same gene. For instance, pea plants can have either homozygous dominant (red-red) or heterozygous red blooms (red-white). They are homozygous recessive if they have white blooms (white-white). Heterozygous carriers are always present.

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A city lies near a forest. The city leaders decide the forest should be protected. There is a stream running
through the forest, too.
Which action would preservationists and conservationists agree on?
A. Some fish can be caught in the stream
O B Fighting forest fires should be allowed.
C. The forest and stream should be protected
OD Hunting shouldn't be allowed in the forest
E. People should be allowed to camp in the forest,

Answers

the answer z C because preservationist and conservationist they protect world life

Is there an impact on the environment if blue whales went extinct?

Answers

Answer:

Yes.

Explanation:

Blue whales are the largest animals in the world, and they are the apex predator in the ocean, meaning they help to regulate the population of other species in the ecosystem. As with any species, the loss of blue whales would cause imbalances in the food chain, which would have far-reaching effects throughout the ocean and its inhabitants. In addition, blue whales help maintain the balance of carbon dioxide in the ocean which could be lost if the species were to go extinct.

23. Which is NOT an electromagnetic wave?
A. sound
C. infrared wave
B. microwave
D. ultraviolet ray​

Answers

Answer:

sound

Explanation:

electromagnetic waves travel at the speed of light, for example when there is a thunder storm the lightening is seen before the thunder is heard

What is a functioning or functional penis?

Answers

Answer:

A functioning or functional penis is when a penis is working meaning when the penis reacts to a woman naked thats a functional penis

The ability to perform or get stimulation to arousal such as a B0ner

filtered for "brainly purposes"

The solid below is made of twelve identical
rectangular prisms. The overall dimensions of the composite solid are 36 inches (in.) by 36 inches by 24 inches. What is the volume, in cubic inches, of a single prism?

Whoever answers correctly will get Brainliest.

Answers

Answer:

Hewo! Mizuki here to help! The correct answer would be option A!

Explanation:

Oki! So.... we find out the length, width, and height first!

The equation for finding the length: 36 ÷ 2

And the answer will be 18, make sure to memo it if your following along!

The equation for finding width: 36 ÷ 3

And the answer will be 12, so yeah(I tried it with 2 because it was 2 prism long, but it turned out to be a number not on the list [3888])

The equation for finding height: 24 ÷ 2

And the answer will be 12!

Soo... we multiply the length, width, and height!

18 x 12 x 12 = 2592

Since 2592 in on the list, that will be your answer!

HELP LIMITED TIME!!!!!!!!!!!!!!
Which of the following can be affected by a change in the Earth's
climate?
Select one:

1, Weather

2, Plants and animals

3, All of these can be affected

4, Ecosystems

Answers

Answer:

All of these can be affected

Explanation:

A change in the Earth's climate can have a number of impacts on the planet and its inhabitants. Weather is a key aspect of climate, and a change in climate can lead to changes in patterns of weather, such as changes in the frequency or intensity of storms, droughts, or other extreme weather events. These changes can have significant impacts on plants and animals, as they may be adapted to specific types of weather and climate conditions. Ecosystems, which are complex systems of interacting plants, animals, and other organisms, can also be affected by changes in climate, as these changes can alter the relationships between different species and the availability of resources. Overall, climate change can have a range of impacts on the Earth and its inhabitants, and understanding these impacts is an important part of addressing this global challenge.


Explain how fish and sharks breathe. what are some differences?

Answers

uhhhhh they breath bc they’re animals
They breathe through their gills

What is the answer for Tia makes a model of a glacier with clay, sand, and an ice cube. She pushes the ice cube over the clay that is covered with sand. Explain how she could use the model to show that glaciers carry soil.

Answers

The model prepared by Tia could be used to show the glaciers which carry soil as similar to the clay which carries the ice cubes and sand, the glaciers also carry various materials along with them.

What are Glaciers?

A glacier is a persistent body of dense ice and other materials that is constantly moving under its own weight and force. A glacier forms where the accumulation of snow exceeds the ablation over the period of many years, often centuries.

Glaciers acquire the distinguishing features, such as crevasses and seracs, as it slowly undergoes flow and deforms under the stresses which are induced by its own weight. As it moves constantly, it abrades rocks and debris from its substrate to create the major landforms such as cirques, moraines, or fjords. Although a glacier may flow into a waterbody, it forms only on the land surface and is distinct from that of much thinner sea ice and lake ice which form on the surface of bodies of water.


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Can an intersex person cause a girl to get pregnant?

Answers

Explanation:

If an intersex person has a uterus, they may be able to carry a child.

Which of the following is an example of a transgenic organism?
A) millions of copies of DNA that was amplified by PCR b)The human genome
C)Dolly the cloned sheep
D) Zebra fish expressing the Green Fluorescent Protein from jellyfish
E)A person's short tandem repeat profile

Answers

A) millions of copies of DNA that was amplified by PCR

How are clouds formed?
Explain your answer.''

Answers

Answer:

Water vapor

Explanation:

Clouds are formed when water evaporates into water vapor.

Answer:clouds mainly consist of water vapor clouds mainly consist of water vapor


Carbon dioxide moves through the plasma membrane through the process of

A. osmosis
B. active transport
C. diffusion
D. facilitated diffusion
E. both diffusion and osmosis​

Answers

As oxygen-rich (and carbon dioxide-poor) blood travels by a cell the oxygen diffuses through the cell membrane to the area of lower concentration inside the cell. It can do this easily because the oxygen molecule (O2) is very small and has no charge or polarity. The oxygen is used up rapidly by mitochondria. This rapid consumption causes oxygen to constantly move into the cell from the blood. Therefore the answer is C

Classify each trait as favorable or non-favorable for different organisms
living in a jungle
Favorable trait
Non favorable trait

A thick layer of fot to help
keep the organism warmin
the cold

Green fouthers to help
Camouflage

Long strong limbs to help
climb trees

Answers

Answer:

A thick layer of fat to help keep the organism warm in the cold - non-favourable trait because jungles aren't usually very cold

Green feathers to help camouflage - favourable trait because the environment is mostly green

Long, strong limbs to help climb trees - favourable trait because jungles have many trees

What is added during DNA extraction to lyse cells?

Answers

Answer:

There are 3 basic steps involved in DNA extraction, that is, lysis, precipitation and purification. In lysis, the nucleus and the cell are broken open, thus releasing DNA. ... Alcohol (e.g isopropanol or ethanol) is then added, causes precipitation of DNA from the aqueous solution since it does not dissolve in alcohol.

Explanation:

What happens during the Calvin cycle of photosynthesis?

Answers

The Calvin cycle is part of photosynthesis, which occurs in two stages. In the first stage, chemical reactions use energy from light to produce ATP and NADPH. In the second stage (Calvin cycle or dark reactions), carbon dioxide and water are converted into organic molecules, such as glucose

Dengue fever is an infectious disease of humans that is caused by a virus. There are four main viral strains, and an individual can never be infected by the same strain twice. However, a second infection can occur by any of the other strains. The severity of the second infection depends on the identity of both the strain that caused the first infection and the strain causing the second infection, as well as the order in which these were acquired.

Required:
How many different levels of severity are possible for an individual acquiring a second infection

Answers

Answer:

12

Explanation:

Suppose the four different strains are P, Q, R, S. Thus, the first infection can be from any of the four strains and it occurs in 4 ways.

Since an individual cannot be infected again with the strain from which he/she is been previously infected;

Then, at the second time;

The possible number of strain to be infected with = 4-1 = 3 ways

Thus; the number of possible different levels of severity can be viewed by forming two lettered word  P, Q, R, and S without repetition which is:

= 4 × 3

 = 12

multiple choice question

Answers

Answer:

C) Sodium ions

A phenotype is...

A.The genetic makeup of an organism

B. The trait that is not expressed when a dominant trait is present

C. The physical traits you can see in an organism

D. The trait that is expressed over another trait ​

Answers

Answer:

C

Explanation:

the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.

True or False: Coal is the cheapest available source of energy.
True
False

Answers

Answer:

True

Explanation:

A coal is cheapest or least expensive among non- renewable energy.

... But it is not the cheapest among all because solar energy, wind energy etc

What tide is the strongest?

Answers

Answer:

spring tide

at new moon or full moon, the tide's range is at its maximum. This is the spring tide: the highest (and lowest) tide.

Answer: Canada

I did research on the strongest tides and I found this. Good it helps.

The main types of molecules in your body are water and carbon-containing organic molecules. To continue to live, you need to consume organic molecules in your food. What does your body use these organic molecules for?

Answers

Answer:

for production of energy

Explanation:

to enable the action of heart beat, keeping the body warm, to build body tissues, etc, while facilitates ones living

Explain how the structure of a cell allows localization of reactions, protection from reactive molecules, and greater efficiency of cellular processes than a bacterial cell.

Answers

The structure of a eukaryotic cell allows localization of reactions because there are subcompartments in the cell where specific enzymes colocalize, protection from reactive molecules refers to structural barriers, while greater efficiency of cellular processes in this cell than a bacterial cell is based on the subdivision of work.

What does subdivision of work mean in terms of a eukaryotic cell?

The expression subdivision of work mean in terms of a eukaryotic cell makes reference to the presence of different cell compartments such as those associated with particular organelles which provide a suitable medium to carry out particular reactions such as the presence of hydrolytic enzymes in lysosomes.

Therefore, with this data, we can see that the subdivision of work is fundamental in a eukaryotic cell in order to perform different tasks, which is translated to higher metabolic efficiency when compared to bacteria.

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Name the characteristic of living organism illustrated by each if activities described below.


Dressing heavily.
Bursting of the sporangium in Rhizopus.
Bending of the plant shoot towards light.
A monkey putting a yellow banana in it's mouth​

Answers

Answer:

This question relates to the qualities that help us differentiate between living and non-living things. In this question, some activities have been described. As indicated below, such activities regardless of how it is exhibited must fall under a certain trait for which living organisms are known. Hence the answer to the question is as follows:

A: Dressing heavily can be characterized as ADAPTATION

B: Bursting of the Sporangium in Rhizopus is a process that is critical to its REPRODUCTION

C: Bending of the plant shoot towards light speaks to MOVEMENT. For them, light is critical to growth so they must move towards it and away from the shade.

D:  A monkey putting a yellow banana in its mouth is called NUTRITION. Every living organism must absorb nutrients in order to remain alive and grow.

Explanation:

There are other characteristics that help to differentiate living from non-living organisms. They are best memoriZed using the following acronym:  

MR. NIGER A.D.

M: Movement

R: Respiration

N: Nutrition

I:  Irritability

G: Growth

E: Excretion

R: Reproduction

A: Adaptation

D: Death

There are other qualities such as  

possession of Cells and DNA  (a living thing may be unicellular or multicellular)ability to Metabolize, that is, ingest and convert and absorb nutrients Homeostasis: This is the ability of an organism to regulate its internal environment Interaction with living and non-living things

All the above make it easy to distinguish between matter that has life and that which doesn't.

Cheers

 

   

what is chromosomes ​

Answers

Answer:

a chrosome is made up of proteins and DNA organized into genes each cell normally contains 23 pairs of chrosomes.

Chromosomes are structures formed by a DNA molecule associated with protein molecules. In prokaryotic cells, we observe a circular chromosome; in eukaryotes, chromosomes are linear and located inside the nucleus.

what is the main function of complex 3 of the electron transport chain

Answers

Answer:

Complex III of the electron transport chain, also known as Q-cytochrome c oxidoreductase or simply cytochrome reductase, is a multi-subunit structure that functions to accept electrons from ubiquinol and transfer them onto another electron carrier called cytochrome c.

Explanation:

hopefully this helps you

5. Explain why these are termed so?
a. Saccharomyces for Yeast
b. Rhododendron for Laligurans
c. Spirogyra for Pond silk.

d. Polymorphism, Metamorphism & Metaphase
e. Apospory, apogamy, apomixis, cytomixis
f. Synandrous, Syncarpous, Syngenesious, Synapsis.

Answers

Answer and Explanation

a. Saccharomyces for Yeast: Saccharomyces is a genus of fungi in the family Saccharomycetaceae, and it is Latin for "sugar fungus." Yeast is a common type of fungus that ferments sugars to produce alcohol and carbon dioxide, so the genus name Saccharomyces is fitting for the species that make up this group of yeasts.

b. Rhododendron for Laligurans: Rhododendron is a genus of plants in the family Ericaceae, and is native to Asia. The name "Rhododendron" comes from the Greek words "rhodon" meaning rose and "dendron" meaning tree. The name refers to the many-petalled flowers that many of the species have.

Laligurans is a species of this genus, with beautiful flowers and found mainly in Himalayan region.

c. Spirogyra for Pond silk: Spirogyra is a genus of green algae in the order Zygnematales, commonly found in freshwater habitats. The name "Spirogyra" is derived from Greek words "spira" meaning coil and "gyros" meaning ring, referring to the spiral chloroplasts present in the cells. The common name "Pond silk" refers to the long, thin, green filaments that make up the algal mat.

d. Polymorphism, Metamorphism & Metaphase:

Polymorphism refers to the occurrence of more than one form of an organism in the same population.

Metamorphism refers to the process of transformation in the form of the organism during its life cycle.

Metaphase refers to a stage in the cell cycle when chromosomes align in the center of the cell during cell division.

e. Apospory, apogamy, apomixis, cytomixis:

Apospory refers to the development of a new individual from a cell other than a sperm or egg cell.

Apogamy refers to the development of an embryo from a cell other than a sperm or egg cell.

Apomixis refers to the development of a new individual from an asexual reproductive cell or structure.

Cytomixis refers to the mixing of genetic material during cell division.

f. Synandrous, Syncarpous, Syngenesious, Synapsis:

Synandrous refers to the condition in which multiple stamens are fused together, as in certain flowers.

Syncarpous refers to the condition where multiple carpels are fused together to form a single pistil.

Syngenesious refers to the condition in which the stamens are fused to the style, as in certain flowers

Synapsis refers to the physical alignment of homologous chromosomes during meiosis, leading to the exchange of genetic material.

Is it possible for you to find out whether a plant has taproot or fibrous roots by looking at
the impression of its leaf on a sheet of paper? Think and explain the answer.

Answers

Answer:

No, it is not possible to determine whether a plant has taproot or fibrous roots by looking at the impression of its leaf on a sheet of paper. This is because the root system of a plant is hidden underground and cannot be seen from the surface. The shape and size of a leaf can provide clues about the type of root system a plant has, but the impression of a leaf on a sheet of paper does not provide enough information to definitively identify the type of root system.

Explanation:

If a solution is 8% solute, it is [x]% solvent

Answers

If a solution is 8% solute, that means 8% of it (or 8/100ths) is made up of the stuff you added to it. We know that the whole solution is 100%. Therefore, we need to subtract 8% from 100%, which gives us 92%. We know this is correct since you can't have a less than 100% solution, since it exists wholly.

92% should be your answer.

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