MCQs BIOCHEMISTRY: Glycolysis

1.
Glycolytic pathway regulation involves

A. allosteric stimulation by ADP
B. allosteric inhibition by ATP
C. feedback, or product, inhibition by ATP
D. all of the above
Answer & Explanation
Answer: Option D

1.
Glycolytic pathway regulation involves

Let us discuss.

Discuss in Forum
2.
During catabolism, only about 40% of the energy available from oxidizing glucose is used to synthesize ATP. Remaining 60%

A. is lost as heat
B. is used to reduce NADP
C. remains in the products of metabolism
D. is stored as fat.
Answer & Explanation
Answer: Option A

3.
Why does the glycolytic pathway continue in the direction of glucose catabolism?

A. There are essentially three irreversible reactions that act as the driving force for the pathway
B. High levels of ATP keep the pathway going in a forward direction
C. The enzymes of glycolysis only function in one direction
D. Glycolysis occurs in either direction
Answer & Explanation
Answer: Option A

4.
The released energy obtained by oxidation of glucose is stored as

A. a concentration gradient across a membrane
B. ADP
C. ATP
D. NAD+
Answer & Explanation
Answer: Option C

5.
A kinase is an enzyme that

A. removes phosphate groups of substrates
B. uses ATP to add a phosphate group to the substrate
C. uses NADH to change the oxidation state of the substrate
D. removes water from a double bond
Answer & Explanation
Answer: Option B

.
For every one molecule of sugar glucose which is oxidized __________ molecule of pyruvic acid are produced.

A. 1 B. 2
C. 3 D. 4
Answer & Explanation
Answer: Option B

7.
In the glycogen synthase reaction, the precursor to glycogen is

A. glucose-6-P B. UTP-glucose
C. UDP-glucose D. glucose-1-P
Answer & Explanation
Answer: Option C

8.
The active form of glycogen phosphorylase is phosphorylated, while the dephosphorylation of which active form occurs?

A. Glycogen synthase
B. Glycogen semisynthase
C. Glycogen hydrolase
D. Glycogen dehydrogenase
Answer & Explanation
Answer: Option A

V
10.
The enzymes of glycolysis in a eukaryotic cell are located in the

A. intermembrane space
B. plasma membrane
C. cytosol
D. mitochondrial matrix
Answer & Explanation
Answer: Option C

11.
When concentration of the reactants is higher than the equilibrium concentration then

A. the gibbs free energy will be positive
B. the gibbs free energy will be negative
C. more products will be formed
D. both (b) and (c)
Answer & Explanation
Answer: Option D

12.
Which of the following is not true of glycolysis?

A. ADP is phosphorylated to ATP via substrate level phosphorylation
B. The pathway does not require oxygen
C. The pathway oxidizes two moles of NADH to NAD+ for each mole of glucose that enters
D. The pathway requires two moles of ATP to get started catabo-lizing each mole of glucose
Answer & Explanation
Answer: Option C

13.
In glycolysis, ATP is formed by the transfer of a high-energy phosphate from 1,3-bisphosphoglycerate to ADR No such high-energy phosphate donor has ever been isolated in mitochondria because

A. the techniques for isolating the phosphate donor are not refined enough
B. no such phosphate donor exists
C. the high-energy phosphate donor is very short-lived and difficult to isolate
D. None of the above
Answer & Explanation
Answer: Option B

14.
ATP is from which general category of molecules?

A. Polysaccharides
B. Proteins
C. Nucleotides
D. Amino acids
Answer & Explanation
Answer: Option C

15.
The glycolytic pathway (glucose → 2 pyruvate) is found

A. in all living organisms
B. primarily in animals excluding particles
C. only in eukaryotes
D. only in yeast
Answer & Explanation
Answer: Option A

 

i need more questions like this where i get this please anyone help me gk questions

 

i need more questions like this where i get this please anyone help me gk questions