Regarding the models of cooperativity:_______.
a. the concerted model is based on the
b. T state and the sequential on the R state.
c. T state is low affinity and R state is high affinity.
d. the concerted model and the sequential model are mutually exclusive.
e. these models, strictly speaking, only apply to tetramers.

Answers

Answer 1

Answer:

c. T state is low affinity and R state is high affinity.

Explanation:

Hemoglobin (Hb) is a multimeric protein molecule that transports oxygen from the lungs to the body's tissues in red blood cells. Hb exists in two quaternary states: 1- a T-state or deoxygenated conformation, which is referred to as 'deoxyhemoglobin'; and 2-a R state or fully oxygenated conformation, which is referred to as 'oxyhemoglobin'. The sequential model of cooperativity states that the conformation of a multimeric protein changes with each binding of a ligand, thereby sequentially changing its affinity for the ligand (i.e., cooperativity is dependent on ligand-induced). In consequence, this model states that the conformational state and affinity of Hb monomers change as they bind to oxygen.


Related Questions

What role does mutation play in the evolution of a species and the development of new characteristics?

Answers

Answer:

Mutation plays a vital part in evolution; it is the greatest source of genetic variation. In evolution, it creates a new DNA sequence for a particular gene, creating a new allele. Additionally, recombination can produce a DNA sequence (a new allele) for a specific gene through intragenic recombination.

Explanation:

Hope this helps!

You learned in the previous lesson that T cells require two independent signals to become activated. When T cells are activated, they acquire effector functions and begin to proliferate. This two-signal mechanism prevents the expansion of self-reactive effector T cells. Similarly, B cell receptor signaling alone is not sufficient to activate B cells. B cells require assistance from helper T cells to become activated by monovalent protein antigens and gain certain immune functions. What changes do you suspect will occur to B cells when they are activated by protein antigen and receive T cell help? (select all that apply)
a) They will generate memory cells that can respond to a subsequent exposure to antigen.
b) Their immunoglobulin genes will be mutated in a way that alters antigen affinity.
c) The isotype of their immunoglobulin (Ig) genes will change.
d) They will proliferate and expand.
e) They will secrete antibodies.

Answers

Answer:

a. They will generate memory cells that can respond to subsequent exposure to antigen.

d. They will proliferate and expand

e. They will secrete anti bodies

Explanation:

B cells are type of white blood cells who belong to lymphocyte subtype. They are activated by binding of antigen to receptors on cells surface, against which they initiate and antibody response. Some of these cell proliferate and divide while other become long lived memory cells that respond subsequent exposure to antigen at later stage.

Is cell division a continuous process?

Illustrate with an example

Answers

Answer:

Cell division is the means of reproduction in unicellular organisms whereas it is the means of tissue growth and maintenance in multicellular organisms. ... In adults, cell divisions are involved in renewing old tissues rather than growth.,ya it is continuously processing

In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Phenotypic outcomes of their offspring? (hint: a punnett square will help you determine this).

In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Genotypic outcomes of their offspring? (hint: a punnett square will help you determine this).

All the offspring of a cross between a black-eyed mendelien and an orange-eyed mendelien have black eyes. What is the expected F2 phenotypic ratio of a cross between two F1 black-eyed mendeliens?
A) 1 black-eyed:1 orange-eyed
B) 3 black-eyed:1 orange-eyed
C) 1 black-eyed:3 orange-eyed
D) 1 black-eyed:0 orange-eyed

Answers

The phenotypic ratio of the cross is as follows: 3 red antennas: 1 white antenna

For question 2, the phenotypic ratio of the F2 generation is: 3 black-eyed: 1 orange-eyed

QUESTION 1

According to the first question, a gene coding for antenna color in butterflies is involved. Red antennas (“R”) is dominant to white antennas (“r”). Hence, a butterfly with genotype "Rr" will be phenotypically red.

According to this question, If both parents are heterozygous for red antennas i.e. Rr (red antenna) × Rr (red antenna), the following gametes will be produced: R and r. Using these gametes in a punnet square (see attached image), the following phenotypic ratio of offspring is produced:

3 RED ANTENNAS (RR, Rr, Rr) : 1 WHITE ANTENNA (rr)

2. In the second question, all the offspring of a cross between a black-eyed mendelien (BB) and an orange-eyed mendelien (bb) have black eyes (Bb). In a cross between two F1 black-eyed mendeliens i.e. Bb × Bb, the following proportion of offspring is produced:

BB, Bb, Bb, bb

Hence, a phenotypic ratio of 3 black-eyed: 1 orange-eyed

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quá trình nhận thức là gì và kết hôn đồng tính là gì

Answers

The answer should be 6

sinanthropus pekinenis was victim of cannibalism

Answers

yes he was he was a victim on cannibalism

g In order to stimulate the renin-angtiotensin-aldosterone system (RAAS), _______________ cells in the kidney detect _______________blood pressure which causes ________________ to be released from the juxtaglomerular cells.

Answers

Answer:

Macula densa cells, lower and renin.

Explanation:

Macula densa cells in the kidney detect lowers blood pressure which causes renin to be released from the juxtaglomerular cells which is  an enzyme. The arterial cells observe the drop in blood pressure, and the decrease in Na concentration is transfer to them by the macula densa cells. The juxtaglomerular cells then release an enzyme called renin. Renin converts angiotensinogen which is a peptide, or amino acid derivative into angiotensin-1.

explain why in the morning plant leaves are moisten​

Answers

Answer:-

It occurs when there is active absorption of water by roots and transpiration is low i.e. moist and humid conditions. Therefore, guttation generally occurs in the early morning because transpiration is less at that time but water is actively absorbed by the roots.

During alcoholic fermentation, when is NAD+ converted to NADH -- during the conversion of glucose to pyruvate (glycolysis) or during the conversion of pyruvate to alcohol?

Answers

Answer:

During the conversion of glucose to pyruvate glycolysis or during the conversion of pyruvate to alcohol

Explanation:

During the conversion of glucose to pyruvate, NAD+ is converted into NADH.

What is alcoholic fermentation?

Alcoholic fermentation is a biological process that converts sugars into cellular energy while emitting ethanol and carbon dioxide as byproducts.

The NADH + H+ from glycolysis would be recycled back to NAD+ during the fermentation process, allowing glycolysis to continue. NAD+ is reduced during glycolysis to form NADH + H+.

Thus, during this, when glucose is converted to pyruvate, NAD+ is being converted to NADH.

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what is diffusion and why is imo​

Answers

Diffusion is the process of water/molecules moving from a high density to a low density, usually through a cell membrane. I can’t understand the question “why is imo”. Hope that helps some

If Sarah had skin vesicles on the anterolateral region of her neck, which peripheral nerve is infected by the virus? To which peripheral nerve plexus does this nerve belong?

Answers

it belongs to the cervical plexus

QUESTION 6
Which one of the following substances is not a product of aerobic respiration?
A.
ATP
B.
Water
C.
Alcohol
D. Carbon dioxide​

Answers

Answer:

C. alcahol

Explanation:

aerobic respiration equation

glucose+ oxygen -> carbob dioxide gas + water + energy

Answer:C

Explanation:

silicon and _______ stay in the the outer cells pls tell me fast​

Answers

Answer:

It could be halogens for example things like fluorine

A new member of your team is visually impaired. He's having a hard time reading his computer screen. How can you show that you value diversity? a) Suggest the organization may not be a great fit. O b) Tell him to apply for a different job within the organization that does not b) require computer usage. 12 Od Tell him that he might want to schedule an eye exam. c) d) Provide access to technology that can magnify or read what is on the computer screen.

Answers

Explanation:

Provide access to technology that can magnify or read what is on the computer screen.

Which of the following statements are true
A calorie is a unit of heat
B one calorie is the energy required to raise 1 kilogram of water
C the preferred unit in metabolism studies and nutrition label is a kilogram

Answers

Answer:

Calorie is a unit of heat

what are three characteristics of life that archaea bacteria have?

Answers

Answer:

The common characteristics of Archaebacteria known to date are these:

(1) the presence of characteristic tRNAs and ribosomal RNAs.

(2) the absence of peptidoglycan cell walls, with in many cases, replacement by a largely proteinaceous coat.

(3) the occurrence of ether linked lipids built from phytanyl chains.

Rain and snow are two forms of ____________.

Answers

Precipitation is any type of water that forms in the Earth's atmosphere and then drops onto the surface of the Earth.
The rain that falls from clouds but freezes before it reaches the ground is called sleet or ice pellets.
Snow is precipitation that falls in the form of ice crystals
Hail forms when very cold water droplets freeze, or turn solid, as soon as they touch things like dust or dirt
Water vapor in the atmosphere is visible as clouds and fog.

Answer:

precipitation

Explanation:

The most common types of precipitation are rain, hail, and snow. Rain is precipitation that falls to the surface of the Earth as water droplets.

Abnormalities in the number of X chromosomes tends to have milder phenotypic effects than the same abnormalities in autosomes because of ___________.

Answers

Answer:

D. (X inactivation) I believe!

Hope this helps! Have a nice day :)

55:57
Which was not a result of the 1898 discovery of the four blood types and advances made during the two World Wars?
improved blood transfusion safety
effective blood preservation solutions developed
ability to separate different parts of blood for different uses
all blood types made compatible with each other

Answers

Answer:

i don't know

Explanation:

i don't know

supuie ) Prokaryotes have nucleus that is without : i) nuclear ii) membrane nucleous iii) nucle​

Answers

Answer:

the ans is

NUCLEOUS MEMBRANE

or

MEMBRANE nucleus u can call it either way

Answer:

Nucle

Explanation:It is said that Prokaryotes have nucleus that has nuclear,membrane and nucleous

1. An oral examination limits the practitioner to knowledge of what is seen clinically.
a. True
b. False

2. Dental radiographs allow the practitioner to see many conditions that are not apparent clinically.
a. True
b. False

Answers

Answer:

1. True.

2. True.

Explanation:

Diagnostic testing can be defined as a scientific process that typically involves identifying a condition or its cause through a series of procedures and examination.

In Medicine, a diagnostic test can be used to identify a disease (sickness) or cause of symptoms.

This ultimately implies that, a diagnostic test avails medical professionals or experts the opportunity to identify illnesses and underlying causes of symptoms.

1. True: an oral examination limits the ability of a medical professional or expert (practitioner) to have knowledge of what is seen clinically.

2. True: dental radiographs is an equipment which allow a medical professional or expert (practitioner) to see many conditions that are not apparent clinically.

what is the phylum of lizard?​

Answers

Lizard belongs to chordate phylum.

hope it helps you.

If you were given the power to control the United States government and policy what changes would you make regarding the environment and how would you fund these? You can consider your response to the question and/or include other issues.

Answers

Answer:

i would probably fund different jails using taxes. there's absolutely no reason someone who accidently committed tax fraud should be sitting in the same cell as aconvicted murderer. & abd I would make harder consequences for hate crimes. like jail time.

Eutrophication occurs when excess nutrients are supplied to a region, leading to an algae bloom and ultimately ______
A. Coral bleaching
B. Ocean deoxygenation
C. Ocean acidification
D. Overfishing

Answers

Answer:

The correct answer is - B. Ocean deoxygenation.

Explanation:

Eutrophication is the process in which a water body gets excessively rich in nutrients that leads to the algal growth or plankton growth in this region and covers the complete surface or most of the water body.

Due to this algal and plankton growth, there is a significant decrease in the concentration of the dissolved oxygen in water bodies that result in the incapability of supporting the lives found in it. The primary and main reason for this deoxygenation is eutrophication. Ocean deoxygenation is the reduction of the oxygen concentration of the oceans.

What is produced during the replacement reaction of Ba(NO3)2 and Na2SO4?

2BaNa + 2NO3SO4
2NaNO3 + BaSO4
NaNO3 + BaSO4
BaNa2 + (NO3)2SO4

Answers

Answer:

2NaNO3 + BaSO4

Explanation:

Answer:

2NaNO3 + BaSO4

Explanation:

Hydrocarbons are burned to produce water and carbon dioxide. Propane (C3H8) is a homologous series alkane that belongs to the hydrocarbon family. As a result, when propane is burned, three molecules of carbon dioxide and four molecules of water are produced.

Because there is an overabundance of oxygen, carbon dioxide is created when butane is completely burned.

Should the U.S. be able to prevent other countries from developing nuclear power?

Answers

Answer:

We should use nuclear power instead of other sources of energy because it can produce high levels of electricity without causing damage to our environment and atmosphere. ... Nuclear power plants produce less pollution than many of our other current energy sources, including coal fire and natural gas plants . I dont think us will be able to prevent other countries from developing nuclear power because  us is also developing nuclear power and 1 country cannot stop countries more than 150 ..

the function of the marrow of long bones in the body is to?
A.store iron
B. Reduce Friction
C. make blood plasma
D.make red blood cells​

Answers

Answer:

Make red blood cells

Explanation:

Bone marrow is a spongy substance found in the center of the bones. It manufactures bone marrow stem cells and other substances, which in turn produce blood cells. Each type of blood cell made by the bone marrow has an important job. Red blood cells carry oxygen to tissues in the body.

state 6 importance of respiration​

Answers

Answer

Respiration is important because it produces energy that is essential for the normal functioning of the body.Respiration provides cells with oxygen and expels toxic carbon dioxide.It provides pure oxygen to alive and for proper functions.It is very important to live alive.It supply and remove oxygen and carbon dioxide. It has a leading role in functioning in the human body.

Apply logarithm to evaluate T given 644 204=400 000 (1+10%)^T,by first simplify the equation.​

Answers

The value of T after applying logarithm to evaluate the function is 4.9988

Given the expression

[tex]644 204=400 000 (1+10 \%)^T[/tex]

Since 10% = 0.1, the expression becomes;

[tex]644 204=400 000 (1+0.1)^T\\644 204=400 000 (1.1)^T\\\frac{644204}{400000} =1.1^T\\1.61051=1.1^T[/tex]

Take the logarithm of both sides

[tex]log1.61051=log1.1^T\\log1.61051=Tlog1.1\\Swap\\Tlog1.1=log1.61051\\T=\frac{log1.61051}{log1.1}\\T=\frac{0.2069}{0.04139} \\T=4.9988[/tex]

The value of T after applying logarithm to evaluate the function is 4.9988

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What is a difference between complete metamorphosis and incomplete metamorphosis?

Two stages of a butterfly's life cyles are described below.

Stage 1: The caterpillar sheds its skin as it grows.
Stage 2: The butterfly breaks out of the chrysalis.

Which statement is true about the stages?

Answers

Answer:

stage. 1

Explanation:

stage.1 it is right

Answer:

Stage 1 is the larva stage and Stage 2 is the adult stage.

Explanation:

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