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WorksheetsPentose Phosphate Pathway Oxidative phase
Total questions: 15
Worksheet time: 8mins
What is the primary function of the oxidative phase of the pentose phosphate pathway?
To oxidize glucose 6-phosphate into ribose 5-phosphate
To convert glucose into fatty acids
To synthesize ATP molecules
To generate carbon dioxide
Which molecule is produced as a reducing agent during the oxidative phase?
Coenzyme A
FADH2
NADPH
NADH
What type of sugar is ribose 5-phosphate?
Pentose
Triose
Hexose
Tetrose
What is released as a byproduct during the oxidative phase?
Carbon dioxide
Glucose
Water
Oxygen
Which enzyme catalyzes the first step of the oxidative phase?
Lactate dehydrogenase
Hexokinase
Glucose 6-phosphate dehydrogenase
Phosphofructokinase
What happens to glucose 6-phosphate in the first step of the oxidative phase?
It is oxidized
It is phosphorylated
It is reduced
It is hydrolyzed
How many NADPH molecules are produced from one glucose 6-phosphate during the oxidative phase?
Four
Three
One
Two
What is the role of NADP+ in the oxidative phase?
It catalyzes the reaction
It is a product of the reaction
It serves as an electron acceptor
It acts as a substrate
What type of reaction occurs in step two of the oxidative phase?
Decarboxylation
Condensation
Hydrolysis
Isomerization
Which enzyme catalyzes the hydrolysis in step two?
Phosphatase isomerase
Lactonase
Glucose 6-phosphate dehydrogenase
Lactate dehydrogenase
What is the final product of the oxidative phase?
Glucose
Ribulose 5-phosphate
Ribose 5-phosphate
NADH
What is the main purpose of the pentose phosphate pathway?
To break down fatty acids
To produce carbon dioxide
To synthesize nucleotides and reducing agents
To generate energy
Which of the following is NOT a product of the pentose phosphate pathway?
Ribose 5-phosphate
NADPH
ATP
Carbon dioxide
What type of sugars are interconverted in the non-oxidative phase?
Only triose sugars
Only hexose sugars
Only pentose sugars
Three to seven carbon sugars
Which molecule is formed from ribulose 5-phosphate in the final step of the oxidative phase?
FADH2
Glucose
D-ribose 5-phosphate
NADH
