Exam (elaborations) Biochemistry 8th edition campbell chapter 17

Biochemistry 8th edition
campbell chapter 17

, which of the following is true about phosphofructokinase
a) it is made of a single polypeptide chain
b) it is found in the muscle only
c) it is made up of four subunits, potentially of two different types
d) a person who lacks the M subunit does not have the glycolytic pathway - CORRECT
ANSWERS-c) it is made up of four subunits, potentially of two different types

The reactions where glucose is converted to glucose-6-phosphate and fructose-6-
phosphate is converted to fructose-1,6-bis are examples of:
a) exergonic reaction
b) priming reactions
c) phosphorylation reactions
d) kinase reactions
e) all of these - CORRECT ANSWERS-e) all of these

How many different reactions involve substrate-level phosphorylation during glycolysis
a) 1
b) 2
c) 3
d)4
e) 6 - CORRECT ANSWERS-b) 2

Enolase catalyzes
a) the cleavage of fructose bisphosphate into two 3-carbon units
b) the dehydration of 2-phosphoglycerate
c) the conversion of phosphoenolpyruvate to pyruvate
d) the conversion of glucose-6-phosphate to fructose-6-phosphate - CORRECT
ANSWERS-b) the dehydration of 2-phosphoglycerate

During glycolysis, ATP is synthesized from ADP and a phosphate group transferred
from an acid anhydride
a) true
b) false - CORRECT ANSWERS-a) true

Which of the following terms describes an enzyme that catalyzes electron transfer
reactions
a) dehydrogenase
b) isomerase
c) kinase
d) phosphatase - CORRECT ANSWERS-d) phosphatase

The step that commits the cell to metabolize glucose is catalyzed by
a) hexokinase
b) phosphoglucomutase
c) aldolase
d) phosphofuctokinase - CORRECT ANSWERS-d) phosphofuctokinase