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BMSC 230 Module 4 questions with correct answers 2024/2025
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BMSC 230 Module 4 questions with correct answers 2024/2025
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BMSC 230 Module 4Which of the following compounds is NOT a product of the pentose phosphate pathway?
- Glycerate 3-phosphate
- CO2
- NADPH
- sedoheptulose 7-phosphate
- ribulose 5-phosphate - ANS- Glycerate 3-phosphate
This non-oxidative branch of the pentose phosphate pathway does NOT include which of the
following reactions?
- Sedoheptulose 7-P + glyceraldehyde 3-P → fructose 6-P + erththrose 4-P
- Ribulose 5-P + glyceraldehyde 3-P → sedoheptulose 7-P
- Ribulose 5-P → xyulose 5-P
- Xylulose 5-P + ribose 5-P → sedoheptulose 7-P → glyceraldehyde 3-P
- Ribulose 5-P → ribose 5-P - ANS- Ribulose 5-P + glyceraldehyde 3-P → sedoheptulose 7-P
Which enzyme catalyzes the rate-limiting step in the pentose phosphate pathway? -
ANSGlucose 6-phosphate dehydrogenase
Which of the following statements about glucose 6-phosphate dehydrogenase are CORRECT?
- It is regulated by the availability of NAD+
- One of its products is 6-phosphogluconate
- It contains thiamine pyrophosphate as a cofactor
- It catalyzes the committed step in the pentose phosphate pathway - ANS- It catalyzes the
committed step in the pentose phosphate pathway
The PPP is linked to glycolysis by which of the following molecules?
- Glucose-1-P
- Ribulose-5-P
- Glyceraldehyde-3-P
- Fructose 1,6-bisP - ANS- Glyceraldehyde-3-P
In the oxidative phase of the PPP ...
- two NADH molecules are produced
- oxygen is required
- ribose-5-P is produces
- glucose-6-P is oxidized - ANS- glucose 6-P is oxidized
The PPP is an important pathway because:
- it produces ATP which can be used for biosynthetic reactions
- it is a source of NADH
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