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

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

D. a collection of unrelated enzyme at the plasma membrane

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

Question #3

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

A. all contain iron to attract electrons

B. gain electrons when they are oxidized

C. are reduced when electrons are lost

D. can be reversibly oxidized and reduced

Question #4

Which of the following organisms can perform glycolysis?

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

B. A redwood tree

C. E coli bacteria

D. All of these

Question #5

The main waste product of the Krebs cycle is ___

A. H20

B. CO2

C. O2

D. Heat

Question #6

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

A. oxygen

B. sulfate

C. pyruvate

D. lactate

Question #7

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

A. Glycolysis slows down

B. The amount of NADH increases

C. The amount of NADH increases

D. ADP usage goes up