Question

1.

Which of the following is (are) correct regarding a proteome?

Group of answer choices

a. It is the collection of proteins that can be expressed by an organism

b. All of the proteome is expressed by each of the cells in an organism at all times

c. The proteins produced by the cell will be dependent on cell type and environment conditions

d. b) and c)

e. a) and c)

2.

Which of the following statement(s) is (are) true regarding the term alleles:

Group of answer choices

a. Present in two copies in a diploid organism.

b. Represent different forms of a gene for the same trait.

c. The nucleotide sequence in alleles representing the same trait must be identical

d. Both a) and b) are correct

e. All are correct.

3.

Depolarization is _______________

Group of answer choices

a. Going to a larger positive resting potential

b. Going to a larger negative resting potential

c. Makes it easier to open channels

d. a) and c) are correct

e. b) and c) are correct

4.

Metabotropic receptors:

Group of answer choices

a. Are G-protein linked receptors

b. Let the ions through the receptors based on conformation change

c. Transmembrane domain forms ion channels

d. Affect the neurons short term

e. None of the above

Answer 1

1

A) It is the collection of proteins that can be expressed by an organism- correct

A proteome is the complete set of proteins expressed by a cell, tissue, or an organism in a particular environment and a particular time.

B) All of the proteomes is expressed by each of the cells in an organism at all times- incorrect

The expression of the protein is specific to cell type within a defined time frame. So not all proteins will be synthesized by every cell all time.

C. The proteins produced by the cell will be dependent on cell type and environmental conditions- Correct

In a particular situation or condition, a specific cell type will produce a specific set of proteins. For example, the proteome or set of protein expressed by the kidney cell will not be the same as the cells present in the eyes.

So the correct option is - E) A and C

2. Alleles are various forms of a gene. For example, if eye color is determined by gene 'A' then different forms of the color like Black or Blue will be determined by the different forms of gene 'A' or 'a'.

A) Present in two copies in a diploid organism.- correct

Diploid organisms have one homologous pair for every chromosome. Each chromosome of a homologous pair cone one allele for a gene. Therefore diploid organism consists of two copies of the allele. For instance, the alleles for gene A in a diploid organism denoted as - AA or Aa or aa.

B) Represent different forms of a gene for the same trait- correct

As discussed earlier they are different forms of a gene.

C) The nucleotide sequence in alleles representing the same trait must be identical- incorrect

Aa the alleles are a variation of a single gene represent different forms of a character their nucleotides sequence must not be the same otherwise the two contrasting alleles would be the same.

So the correct option is- D) both A and B

3. Depolarization is

During depolarization, sodium ion channels on the nerve cell membrane suddenly open and allow sodium ions (Na+) rush to enter into the cell. Therefore,  this process causes a rapid change in membrane potential from negative to a positive state. The greater the depolarization, the greater the chance for the opening of channels.

So the correct option is - d) A and C

4. Metabotropic receptors-

A) Are G-protein linked receptors- correct.

They are G protein-coupled receptors.

B) Let the ions through the receptors based on conformation change- incorrect

Ions are passed through ion channels and metabotropic receptors are not directly linked with ion channels. Ionotropic receptors let the ions through.

C. Transmembrane domain forms ion channels- incorrect

they are a subtype of membrane receptors that do not form an ion channel pore

D. Affect the neurons short term- Incorrect

So the correct option is - A