Find incorrect statements
A. Rhodospirillum is aerobic
B. Anabaena and Nostoc are free-living nitrogen fixers
C. Azotobacter is anaerobic
D. Beijerinckia is aerobic
Find incorrect statements
A. Rhodospirillum is aerobic
B. Anabaena and Nostoc are free-living nitrogen fixers
C. Azotobacter is anaerobic
D. Beijerinckia is aerobic
Show Hint
- C, D
- A, C
- A, B
- B, D
The Correct Option is B
Solution and Explanation
Analysis of Statements:
A. Rhodospirillum is aerobic: ❌ Incorrect. 🔹 Rhodospirillum is generally anaerobic under certain conditions and can perform anoxygenic photosynthesis.
B. Anabaena and Nostoc are free-living nitrogen fixers: ✅ Correct. 🔹 Anabaena and Nostoc are cyanobacteria that fix atmospheric nitrogen and are free-living in aquatic or moist environments.
C. Azotobacter is anaerobic: ❌ Incorrect. 🔹 Azotobacter is an aerobic, free-living nitrogen-fixing bacterium.
D. Beijerinckia is aerobic: ✅ Correct. 🔹 Beijerinckia is an aerobic nitrogen-fixing bacterium.
Thus, the incorrect statements are: A and C
✅ Correct Answer: (2) A, C.
Top Questions on Enzymology
- Read the following statements carefully:
(A) DNA ligases are enzymes that create a phosphodiester bond between DNA fragments.
(B) A protein containing one or more prosthetic groups is called a conjugated protein.,
(C) A type of enzyme inhibition reversed by increasing the substrate concentration is called competitive inhibition.
(D) Two stereoisomers of a given sugar that differ only in the configuration about carbonyl
carbon atom are called anomers.
Choose the correct answer from the options given below: - The energy derived from noncovalent interactions between enzyme and substrate is called:
- The step in an enzymatic reaction of a pathway that needs greatest amount of activation energy is called:
- Enzymes that play two distinct roles, one catalytic and the other regulatory or structural, are called:
- Enzymes that create a phosphodiester bond between the 3' end of one DNA segment and the 5' end of another are called:
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