Where is the respiratory electron transport system (ETS) located in plants?
1. Mitochondrial matrix
2. Outer mitochondrial membrane
3. Inner mitochondrial membrane
4. Intermembrane space
Which of the following statements regarding mitochondria is incorrect?
1. | Mitochondrial matrix contains single circular DNA molecule and ribosomes. |
2. | Outer membrane is permeable to monomers of carbohydrates, fats, and proteins. |
3. | Enzymes of electron transport are embedded in the outer membrane. |
4. | Inner membrane is convoluted with infoldings. |
Respiratory Quotient (RQ) value of tripalmitin is:
1. | 0.09 | 2. | 0.9 |
3. | 0.7 | 4. | 0.007 |
Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by:
1. Phosphofructokinase
2. Aldolase
3. Hexokinase
4. Enolase
The energy-releasing metabolic process in which substrate is oxidized without an external electron acceptor is called:
1. glycolysis
2. fermentation
3. aerobic respiration
4. photorespiration
Which statement is wrong for Krebs' cycle?
1. | There is one point in the cycle where FAD+ is reduced to FADH2 . |
2. | During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesized. |
3. | The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid. |
4. | There are three points in the cycle where NAD+ is reduced to NADH + H+. |
Oxidative phosphorylation is
1. | formation of ATP by transfer of phosphate group from a substrate to ADP |
2. | oxidation of phosphate group in ATP |
3. | addition of phosphate group to ATP |
4. | formation of ATP by energy released from electrons removed during substrate oxidation |
1. | Enzymes of the TCA cycle are present in the mitochondrial matrix. |
2. | Glycolysis occurs in the cytosol. |
3. | Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms. |
4. | Oxidative phosphorylation takes place in the outer mitochondrial membrane. |
1. | It functions as an enzyme |
2. | It functions as an electron carrier |
3. | It is a nucleotide source for ATP synthesis |
4. | It is the final electron acceptor for anaerobic respiration |
Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
1. | Glucose-6-phosphate |
2. | Fructose 1, 6-bisphosphate |
3. | Pyruvic acid |
4. | Acetyl Co-A |