Question

1. Consider a protein that consists of ONE polypeptide chain with two alpha helices and a beta pleated sheet. Which of the choices below describes a tertiary structure of this protein?

Select one:

a. The overall shape of the protein

b. An alpha helix

c. The linear sequence of building block molecules

d. There is no tertiary structure to this protein

2. Which statement is FALSE for mitosis but TRUE for the first round of meiosis?
Preceded by an S-phase

Select one:

a. Preceded by an S-phase

b. Homologous chromosomes pair up

c. Spindle fibers move chromosomes toward a metaphase plate

d. Sister chromatids are separated

e. Daughter cells are ‘clones' of the parent cell

3. Which of the following must use proteins to assist their moving across a cell membrane?

Select one:

a. Oxygen (O2)

b. Carbon dioxide (CO2)

c. Sodium ions (Na+)

d. sugars

e. C, and D

Answer 1

Correct answer with explanation is given below :-