Amphibolic Pathway

Q.

Discuss “The respiratory pathway is an amphibolic pathway.”

Q.

What is the main objective of beta oxidation process?

1. Converts proteins to amino acids
2. Breaks starch into glucose
3. It produces fatty acids
4. Degrades fatty acids to acetyl CoA

Q. Glycerol enters the respiratory pathway after being converted to

1. fructose-1, 6-bisphosphate
2. dihydroxyacetone phosphate
3. glucose-6-phosphate
4. amino acids

Q.

Why does oxidative decarboxylation occur?

Q. Which of the following statements regarding krebs cycle is not true?

1. It starts with six carbon compound
2. It is also called citric acid cycle
3. It occurs in mitochondria
4. The intermediate compound which links glycolysis with Krebs cycle is malic acid.

Q.

How is the order and sequence of amino acids defined?

Q. Which among the following is not a step in Calvin cycle?

1. Reduction
2. Carboxylation
3. Regeneration
4. Photophosphorylation

Q.

What is the end product of protein catabolism?

Q. Which of the following can not be considered as a mitogen?

1. Insulin
2. Auxin
3. Cytokinin
4. Colchicine

Q. The process of breakdown of complex molecules is known as

1. catabolism
2. anabolism
3. amphibolic pathway
4. all the above

Q.

Describe the synthesis of non-essential amino acids.

Q.

Give an example of a feed-forward reaction.

Q.

Removal of hydrogen and CO2 from substrate is called

1. Oxidation

2. Decarboxylation

3. Reductive carboxylation

4. Oxidative decarboxylation

Q. Energy for activation of amino acids during protein synthesis comes from

1. ATP
2. GTP
3. UTP
4. CTP

Q. The image given below indicates the interrelationships among the various metabolic pathways. Now identify A to D.

1. $\begin{array}{cccc}\text{A}& \text{B}& \text{C}& \text{D}\\ \text{Protein}& \text{Acetyl CoA}& \text{Fat}& \text{DHAP}\end{array}$
2. $\begin{array}{cccc}\text{A}& \text{B}& \text{C}& \text{D}\\ \text{Fat}& \text{DHAP}& \text{Protein}& \text{Acetyl CoA}\end{array}$
3. $\begin{array}{cccc}\text{A}& \text{B}& \text{C}& \text{D}\\ \text{Acetyl CoA}& \text{Fat}& \text{DHAP}& \text{Protein}\end{array}$
4. $\begin{array}{cccc}\text{A}& \text{B}& \text{C}& \text{D}\\ \text{Fat}& \text{DHAP}& \text{Acetyl CoA}& \text{Protein}\end{array}$

Q. Proteins acts as respiratory substrates then they would be degraded by proteases and the individual amino acids (after deamination) depending on their structure would enter the pathway at some stage.

1. As pyruvate
2. As acetyl CoA
3. Any of the above
4. Within the Krebs' cycle

Q.

Why is respiratory pathway referred to as an amphibolic pathway?

Q.

Respiratory pathway is believed to be a catabolic pathway. However, nature of TCA cycle is amphibolic. Explain.

Q. The process of formation of complex molecules from simple molecules is known as

1. amphibolic pathway
2. catabolism
3. none of the above
4. anabolism

Q. $PCO$-cycle operates in:-

1. Stroma part of chloroplast
2. Matrix of mitochondria
3. Grana of plastids
4. Chloroplast, mitochondria, peroxisome

Q. 3-Phosphoglyceraldehyde is oxidised in glycolysis to form

1. 1, 3-bisphosphoglycerate
2. Phosphophenol pyruvate
3. 2-phosphoglycerate
4. 3-phosphoglycerate

Q.

FADH2 is formed in conversion of

1. Isocitric acid-oxalosuccinic acid

2. Fumaric acid-malic acid

3. Succinyl CO-A succinic acid

4. Succinic acid-fumaric acid

Q. What is an amphibolic pathway?

1. A pathway that is both catabolic and anabolic in nature.
2. Electron transport chain
3. An example is Kreb's cycle
4. A pathway that produces substrates that can be used to build biomolecules and/or produce ATP.

Q. Discuss "The respiratory pathway is an amphibolic pathway".

Q. Which of the following pathways is not amphibolic?

1. Glycolysis
2. Krebs cycle
3. Photosynthesis
4. Electron transport chain

Q. The process of cell respiration is an amphibolic process or involves both catabolism and anabolism. Choose the intermediate of glucose oxidation, also results in synthesis of glycerol:-

1. Phosphoglyceraldehyde
2. Phosphoglyceric acid
3. Phosphogluconolactone
4. Phosphoenol pyruvate

Q. Which of these is not an amphibolic pathway?

1. Krebs cycle
2. Glycolysis
3. Electron transport system
4. All metabolic pathways

Q. Which acid of TCA cycle is connecting link with nitrogen metabolism?

1. Succinic acid
2. Malic acid
3. $\alpha$-ketoglutaric acid
4. Citric acid

Q.

The total requirement of ATP and NADPH for each molecule of $C{O}_2$ fixed and reduced in photosynthesis in the Calvin cycle is

1. 4 ATP and 3 NADPH

2. 3 ATP and 2 NADPH

3. 2 ATP and 3 NADPH

4. 2 ATP and 2 NADPH

Q. Aerobic respiratory pathway is appropriately termed:

1. Anabolic
2. Catabolic
3. Parabolic
4. Amphibolic