Glycolysis Payoff Phase

Q.

Which is the end product of glycolysis?

1. $\mathrm{Glucose}-1-\mathrm{phosphate}$

2. $\mathrm{Fructose}-1-\mathrm{phosphate}$

3. Acetyl CoA

4. Pyruvic acid

Q.

How many ATP are produced in glycolysis and TCA Cycle?

Q.

Describe the steps involved in Glycolysis.

Q. Choose the steps of glycolysis where substrate level phosphorylation occurs:
(a) Glucose $\to$ Glucose-6-phosphate
(b) $1,3$-bisphosphoglyceric acid $\to$ 3-Phosphoglyceric acid
(c) $1,3$-bisphoglyceraldehyde $\to$ $1,3,$-bisphosphoglyceric acid
(d) Phosphoenolpyruvate $\to$ Pyruvate
(e) Fructose-6-phosphate $\to$ Fructose-$1,6$-bisphosphate

1. a, e
2. a, c
3. b, d
4. a, b, d, e

Q. Which of the following is the energy yielding step of glycolysis?

1. Glucose $\to$ Glucose-6-phosphate
2. BPGA $\to$ PGA
3. Fructose-1, 6-biphosphate $\to$ PGAL
4. Phosphoglycerate $\to$ Phosphoenolpyruvate

Q.

Conversion of glucose to glucose-6-phosphate is catalyzed by

1. Phosphofructokinase

2. Aldolase

3. Enolase

4. Hexokinase

Q. Glycolysis is

1. Anaerobic
2. Aerobic
3. Both anaerobic and aerobic
4. None

Q. Substrate level phosphorylation occurs during conversion of

1. PGA into phosphoglycerate
2. Phosphoenolpyruvate into pyruvic acid
3. Fructose -6-phosphate into fructose-1, 6-bisphosphate
4. Glyceraldehyde-3-phosphate into 1, 3 bisphosphoglyceric acid

Q. Identify the reactions of glycolysis, where ATP is used up.

1. Conversion of 1, 3-bisphosphoglyceric acid to 3-phospho glyceric acid

2. Conversion of fructose-6-phosphate to fructose-1, 6-bisphosphate

3. Both A & C

4. Conversion of glucose to glucose-6-phosphate

Q. Direct ATP synthesis in glycolysis occurs during conversion of ____i____ and ____ii____ into ____iii____ and ____iv____ respectively.

1. i: Fructose-6-phosphate, ii: Glucose-6-phosphate, iii: Fructose-1, 6-biphosphate, iv: 2-phosphoglycerate
2. i: 1, 3-bisphosphoglycerate, ii: Phosphoenolpyruvate, iii: 3-phosphoglycerate, iv: Pyruvate
3. i: Glucose-6-phosphate, ii: Fructose-6-phosphate, iii: Fructose-1, 6-biphosphate, iv: 3-phosphoglyceric acid
4. i: 1, 3-bisphosphoglycerate, ii: 3-phosphoglycerate, iii: Phosphoenolpyruvate, iv: 2-phosphoglyceric acid

Q. A polysaccharide which is synthesized and stored in liver cells is

1. glycogen
2. arabinose
3. lactose
4. galactose

Q. In glycolysis, the dehydration reaction is _____ .

1. Phosphoenolpyruvate forming pyruvate by phosphorylation of ADP
2. Glucose forming glucose-6-phosphate by removal of water
3. 2-Phosphoglycerate forming phosphoenolpyruvate by removal of water
4. Glyceraldehyde-3-phosphate forming 1, 3-bisphosphoglycerate

Q. The common phase between aerobic and anaerobic respiration is called

1. Tricarboxylic acid cycle
2. Oxidative phosphorylation
3. Embden Meyerhof Parnas pathway
4. Fermentation

Q. How many NADH + $H^{+}$ molecules are formed if four glucose molecules enter glycolysis?

1. 2
2. 4
3. 8
4. 16

Q.

The energy-releasing process in which the substrate is oxidized without an external electron acceptor is called?

1. Aerobic respiration

2. Photorespiration

3. Fermentation

4. Glycolysis

Q.

What is the role of PEP carboxylase in C4 and CAM plants?

Q. Substrate level phosphorylation occurs during conversion of

1. Glyceraldehyde-3-phosphate into 1, 3 bisphosphoglyceric acid
2. Fructose -6-phosphate into fructose-1, 6-bisphosphate
3. Phosphoenolpyruvate into pyruvic acid
4. PGA into phosphoglycerate

Q. Which one of the following does not involve isomerisation in glycolysis pathway?

1. Conversion of glycerol aldehyde-3-phosphate to dihydroxyacetone phosphate

2. Conversion of 3-phosphoglyceric acid to 2-phosphoglyceric acid

3. Conversion of glucose-6-phosphate to fructose-6-phosphate

4. Conversion of 2-phosphoglyceric acid to phospho enol pyruvic acid

Q. Pick the odd one out with respect to molecules liberated during glycolysis:

1. $H_{2}O$
2. $C{O}_2$
3. NADH + H${}^{+}$
4. ATP

Q.

What stage of aerobic respiration requires ATP?

Q.

What kind of enzyme is RuBisCO?

Q. Phosphoenol pyruvate, an intermediate in glycolysis, is also an important molecule in which of the following pathways/cycles?

1. Kerbs cycle
2. C${}_3$ cycle
3. None of the above
4. C${}_4$ cycle

Q. During glycolysis, the final step is the conversion of phosphoenolpyruvate to pyruvate with the help of an enzyme. Can you pick which of the following curves is with and without the presence of enzyme?

1. Exothermic reaction with energy A in absence of enzyme and B in the presence of enzyme
2. Endothermic reaction with energy A in presence of enzyme and B in the absence of enzyme
3. Endothermic reaction with energy A in absence of enzyme and B in the presence of enzyme
4. Exothermic reaction with energy A in presence of enzyme and B in the absence of enzyme

Q. What occurs in glycolysis

1. Fixation
2. Reduction
3. Dehydrogenation
4. Oxidation

Q.

Name the site(s) of pyruvate synthesis. Also, write the chemical reaction wherein pyruvic acid dehydrogenase acts as a catalyst.

Q. During glycolysis, if the enzyme pyruvate kinase that converts phosphoenolpyruvate to pyruvate is inhibited, how many direct ATPs are produced per glucose molecule?

1. 1
2. 2
3. 3
4. 4

Q. Direct ATP synthesis in glycolysis occurs during conversion of ____i____ and ____ii____ into ____iii____ and ____iv____ respectively.

1. i: Glucose-6-phosphate, ii: Fructose-6-phosphate, iii: Fructose-1, 6-biphosphate, iv: 3-phosphoglyceric acid
2. i: Fructose-6-phosphate, ii: Glucose-6-phosphate, iii: Fructose-1, 6-biphosphate, iv: 2-phosphoglycerate
3. i: 1, 3-bisphosphoglycerate, ii: Phosphoenolpyruvate, iii: 3-phosphoglycerate, iv: Pyruvate
4. i: 1, 3-bisphosphoglycerate, ii: 3-phosphoglycerate, iii: Phosphoenolpyruvate, iv: 2-phosphoglyceric acid

Q. Which of the following is the energy yielding step of glycolysis?

1. Glucose $\to$ Glucose-6-phosphate
2. BPGA $\to$ PGA
3. Fructose-1, 6-biphosphate $\to$ PGAL
4. Phosphoglycerate $\to$ Phosphoenolpyruvate

Q. In pentose phosphate shunt, the number of NADPH formed per glucose molecule is

1. 12
2. 2
3. 10
4. 6

Q. Match the following molecules released when the products (in the right column) are formed during glycolysis:

$\begin{array}{cc}\text{i. ATP}& \text{1. Triose bisphosphate}\\ \text{ii. NADH}& \text{2. Phosphoenolpyruvate}\\ \text{iii.}{H}_{2}O& \text{3. Triose phosphate}\end{array}$

1. i-2, ii-3, iii-1
2. i-3, ii-1, iii-2
3. i-1, ii-3, iii-2
4. i-1, ii-2, iii-3