CHP 9 BIO QUIZ

Which of the following statements concerning the breakdown of glucose to CO2 and water is (are) true?
A. The breakdown of glucose is exergonic
B. An electron acceptor is called the reducing agent
C. Adding electrons to another substance is known as reduction
D. A,B, and C are correct
E. A and B only are correct

Which kind of metabolic poison would most directly interfere with glycolysis?
A. an agent that closely mimics the structure of glucose but is not metabloized
B. an agent that reacts with NADH and oxidizes it to NAD+
C. an agent that reacts with oxygen and depletes its concentration in the cell
D. an agent that inhibits the formation of acetyl coenzyme A
E. an agent that binds to pyruvate and inactivates it

All of the following substances are produced in a muscle cell under anaerobic conditions except
A. pyruvate
B. acetyl CoA
C. ATP
D. NADH
E. lactate

All of the following are functions of the Krebs cycle except
A. production of NADH
B. production of FADH2
C. production of ATP
D. release of carbon dioxide
E. adding electrons and protons to oxygen to form water

The Krebs cycle produces which of the following molecules that then transfer energy to the electron transport system?
A. NADH and ATP
B. CO2 and FAD
C. FADH2 and NADH
D. NADH, FADH2, and ATP
E. ATP and CO2

During oxidative phosphorylation, H2O is formed. Where do the oxygen atoms in the H2O come from?
A. pyruvate
B. carbon dioxide
C. glucose
D. molecular oxygen
E. lactate

During aerobic respiration, electrons travel downhill in which sequence?
A. good--> glycolysis--> Krebs cycle--> NADH--> ATP
B. glucose-->ATP-->oxygen
C. food--> Krebs cycle-->ATP-->NAD+
D. food--> NADH-->electron transport chain-->oxygen
E. glucose-->ATP--> electron transport chain--> NADH

During aerobic cellular respiration, a proton gradient in mitochondria will be generated by__________and used primarily for___________.
A. glycolysis....production oh H2O
B. the electron transport chain....substrate-level phosphorylatioin
C. fermentation....NAD reduction
D. the electron transport chain....ATP synthesis
E. diffusion of protons....ATP synthesis

Phosphofructokinase is an important control enzyme. All of the following statements concerning this enzyme are true except:
A. it is activated by ADP (or AMP)
B. it is inhibited by ATP
C. it is an allosteric enzyme
D. it is activated by citrate
E. it is a regulator of the processes of glycolysis and the Krebs cycle

Which of the following is not true concerning the cellular compartmentation of the steps of respiration or fermentation?
A. Lactate is produced only in the cytosol
B. FADH2 is pproduced only in the mitochondria
C. NADH is produced only in the mitochondria
D. ATP is produced in the cytosol and the mitochondria
E. Acetyl CoA is produced only in the mitochondria