Amphibolic Pathway

Q. Fatty acids enter Krebs cycle as

1. pyruvate
2. acetyl CoA
3. oxaloacetate
4. carbon dioxide

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. The process of breakdown of complex molecules is known as

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

Q. Which of the following organelle(s) is/are site(s) for beta oxidation in plants?

1. Chloroplast
2. Mitochondrial matrix
3. Peroxisomes
4. Both b and c

Q. Which of the following is a common feature between glycolysis and Krebs cycle?

1. release of ${\mathrm{CO}}_2$
2. formation of ${\mathrm{FADH}}_2$
3. site at which they occur
4. dehydrogenation

Q. Which of the following pathways is not amphibolic?

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

Q. Which among the following is NOT an amphibolic pathway?

1. TCA cycle
2. EMP pathway
3. Calvin cycle
4. Glycolysis

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. Which of the following are correct with reference to amino acids?

1. Proteins are made up of 19 different amino acids
2. They become part of the respiratory pathway only as acetyl CoA
3. Amino acids are degraded to proteins by enzyme protease
4. None of the above

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.

An intermediate compound common to both fatty acid and carbohydrate oxidation is

1. pyruvate

2. acetyl Co-A

3. fructose-1, 6-biphosphate

4. glucose

Q. Amphibolic metabolic pathways

1. Breakdown molecules
2. Both synthesize and breakdown molecules
3. Neither synthesize nor breakdown molecules
4. Synthesis molecules