micro

Topics: Metabolism, Adenosine triphosphate, Cellular respiration Pages: 6 (427 words) Published: November 3, 2013
 
Question 1
1.  
Environmental changes can result in the inactivation of enzymes. Answer
 True
 False
1 points   
Question 2
1.  
Hydrolases are generally involved in __________ reactions.
Answer

anabolic

catabolic

both anabolic and catabolic

neither anabolic nor catabolic

oxidation-reduction
2 points   
Question 3
1.  
Which of the following types of carrier molecules is NOT found in electron transport chains? Answer

ubiquinones

hemoglobin

flavoproteins

cytochromes

metal-containing proteins
2 points   
Question 4
1.  
Anabolic reactions may be characterized as
Answer

forming large molecules from smaller molecules.

breaking large molecules into smaller molecules to produce ATP.

producing ATP.

breaking large molecules into smaller molecules.

exergonic.
2 points   
Question 5
1.  
Which of the following statements concerning cellular metabolism is FALSE? Answer

Energy obtained from nutrients or light is stored in the bonds of ATP.

ATP is used in the formation of macromolecules.

Enzymes are used in both catabolic and anabolic reactions.

Macromolecules are converted into cell structures via catabolism.

The goal of metabolism is reproduction of the organism.
2 points   
Question 6
1.  
Enzymes known as lyases participate in __________ reactions. Answer

catabolic

anabolic

both anabolic and catabolic

neither anabolic nor catabolic

oxidation-reduction
1 points   
Question 7
1.  
Oxidoreductases participate in __________ reactions.
Answer

anabolic

catabolic

both anabolic and catabolic

neither anabolic nor catabolic

energy neutral
2 points   
Question 8
1.  
The molecule that an enzyme acts upon is known as its
Answer

coenzyme.

catalyst.

holoenzyme.

substrate.

apoenzyme.
1 points   
Question 9
1.  
Carbon dioxide is a by-product of which of the following?
Answer

the pentose phosphate pathway

electron transport

chemiosmosis

the Krebs cycle

glycolysis
2 points   
Question 10
1.  
Which of the following statements concerning the Krebs cycle is FALSE? Answer

It is also known as the tricarboxylic acid cycle.

The ATP generated is initially GTP.

Oxaloacetic acid is regenerated.

Two molecules of acetyl-CoA generate more ATP after two cycles than a single molecule of glucose at the end of glycolysis.

NAD+ and FAD are reduced as a result.
2 points   
Question 11
1.  
Which of the following statements concerning glycolysis is TRUE? Answer

It occurs in the cell membranes of bacteria.

It both requires the input of ATP and produces ATP.

It is an alternative to fermentation.

It involves ribulose 5-phosphate as an intermediate.

It produces ATP by oxidative phosphorylation.
2 points   
Question 12
1.  
During chemiosmosis, electrons are pumped across a membrane to produce ATP. Answer
 True
 False
2 points   
Question 13
1.  
How many ATP molecules can be produced from the NADH generated by the catabolism of a molecule of glucose? Answer

36

38

4

34

30
2 points   
Question 14
1.  
Glucose is used as an energy source only when proteins and fats are not available. Answer
 True
 False
1 points   
Question 15
1.  
Essential amino acids are amino acids that cannot be synthesized by an organism and so must be provided as nutrients. Answer
 True
 False
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