Question

31.) Which process would be disrupted by adding a drug that let protons pass freely through mitochondrial membranes?

a. Citric Acid cycle

b. Oxidative Phosphorylation

c. Substrate Level Phosphorylation

d. glycolysis

32.) Which statement is true cellular respiration?

a. energy released from glucose reduction is used to generate ATP

b. some of energy released from glucose oxidation is stored in NADH

c. exergonic reactions in glycolysis are used to generate ATP

d. A and C

e. B and C

33.) Why is water such a good solvent?

a. Most polar and charged substances dissolve in it.

b. It is highly polar.

c. It can participate in hydrogen bonding.

d. All of the above apply.

e. Water is a poor solvent.

34.) Why would breaking disulfide bonds and denaturing a protein cause it to lose its activity?

a. the secondary structure of the protein was changed

b. the primary structure of the protein was altered

c. No RNA was present to be degraded

d. The structure of a protein dictates is function; the denatured (unfolded) protein did not have the correct structure

35.) With the exception of retroviruses, the direction of transfer of genetic information in all living things is as follows:

a. protein A DNA mRNA

b. DNA B mRNA protein

c. DNA C tRNA protein

d. protein D tRNA DNA

e. RNA E DNA mRNA protein

Answer 1

Ans-31- if proton will move freely from intermembrane space to the mitochondria matrix it will vanish the electrochemical gradient that is required for ATP synthesis. So oxidative phosphorylation will not occur. option B is correct.

Ans-32- oxidation of glucose produces ATP, NADH, FADH2. in glycolysis and TCA NADH is the main compound that stores the energy released by glucose oxidation. option B is correct.

Ans-33- water is a polar and partially charged molecule that can form hydrogen bonds with other charged and polar molecules and male them soluble. option D is correct

Ans-34- the function of a protein is determined by the structure of the protein and the structure depends on the different types of bonds that hold the different configuration of amino acid. So if bonds are broken it disturbs the structure and reduces the function of the protein. option D is correct

Ans-35- From DNA by the transcription mRNA is made and from mRNA, proteins are synthesized by the translation. This process is known as the central dogma. option B is correct.