Cal State LA » Biology » Biology 1100 - Principles of Biology » Fall 2019 » Quiz Week 5

Question #1

The pyruvate in the reaction below is ____. Pyruvate + 2e => lactate

A. reduced

B. oxidized

Question #2

Which of the following describes a metabolic pathway? (Choose all that apply),,

A. Enzyme P can have two possible substrates, R and S

B. One enzyme activates another enzyme, which then activates another enzyme

C. a collection of unrelated enzyme at the plasma membrane

D. Enzyme Q breaksdown substrate A into products X, Y and Z

E. a 6-carbon molecule is converted into a 5-carbon molecule, which is then converted into a 4-carbon molecule.

Question #3

One common feature of electron carriers such as NAD+ is that they ___

A. are reduced when electrons are lost

B. all contain iron to attract electrons

C. can be reversibly oxidized and reduced

D. gain electrons when they are oxidized

Question #4

Which of the following organisms can perform glycolysis?

A. A redwood tree

B. All of these

C. P-22, the world’s most famous mountain lion

D. E coli bacteria

Question #5

The main waste product of the Krebs cycle is ___

A. Heat

B. CO2

C. H20

D. O2

Question #6

Which of the following is a final acceptor in the electron transport chains of organisms that conduct anaerobic cellular respiration?

A. pyruvate

B. lactate

C. oxygen

D. sulfate

Question #7

When cells possess plentiful amounts of ATP, what happens to cellular respiration processes within the cell?

A. The amount of NADH increases

B. The amount of NADH increases

C. ADP usage goes up

D. Glycolysis slows down