Match the compounds in Group I with the correct entries in Group II. Group I Group II P) Cyanide 1) K$^+$ ionophore Q) Antimycin A 2) Electron transfer from cytochrome b to cytochrome c$_1$ R) Valinomycin 3) F$_1$ subunit of ATP synthase S) Aurovertin 4) Cytochrome oxidase 5) Adenine nucleotide translocase
Matching Compounds: Group I and Group II
This section explains the matching between biological compounds in Group I and their corresponding functions or targets in Group II.
Compound Function and Target Matching
| Group I Compound | Group II Entry | Reasoning |
| P) Cyanide | 4) Cytochrome oxidase | Cyanide is a known inhibitor of cytochrome oxidase (Complex IV). |
| Q) Antimycin A | 2) Electron transfer from cytochrome b to cytochrome c1 | Antimycin A inhibits Complex III, specifically affecting electron transfer from cytochrome b to cytochrome c1. |
| R) Valinomycin | 1) K$^+$ ionophore | Valinomycin functions as a selective K$^+$ ionophore, facilitating potassium ion transport. |
| S) Aurovertin | 3) F1 subunit of ATP synthase | Aurovertin binds to and inhibits the F1 subunit of ATP synthase. |
Correct Matching Summary
The correct pairings determined are:
- P matches with 4 (Cyanide → Cytochrome oxidase)
- Q matches with 2 (Antimycin A → Electron transfer from cytochrome b to cytochrome c1)
- R matches with 1 (Valinomycin → K$^+$ ionophore)
- S matches with 3 (Aurovertin → F1 subunit of ATP synthase)
This combination corresponds to the selection P-4, Q-2, R-1, S-3.
Important Questions from Photosynthesis Respiration and Electron Transport Chain
- Correctly match the Inhibitor with its respective Function in mitochondrial respiration.
Inhibitor Function P. FCCP 1. Inhibits cytochrome c oxidase Q. Cyanide 2. Makes the membrane permeable to protons R. Oligomycin A 3. Blocks mitochondrial uptake of succinate S. Butyl malonate 4. Inhibits ATP synthase Which of the following are true with regard to anaerobic respiration in bacteria?
P. The final electron acceptor is an inorganic substance other than molecular oxygen
Q. The number of ATP molecules produced per glucose molecule is more than that produced in aerobic respiration
R. The number of ATP molecules produced per glucose molecule is less than that produced in aerobic respiration
S. Only substrate level phosphorylation is used to generate ATP
- ATP biosynthesis takes place utilizing the $H^+$ gradient in mitochondria and chloroplasts. Identify the correct sites of $H^+$ gradient formation.
- During photorespiration under low $CO_2$ and high $O_2$ levels, $O_2$ reacts with ribulose 1,5- bisphosphate to yield
Match items in Group I with Group II.
Group I Group II
P. Glycolytic pathway 1. Chloroplast
Q. Eukaryotic oxidative metabolism 2. Glyoxysomes
R. Glyoxylate cycle 3. Mitochondria
S. Calvin cycle 4. Cytosol
