Nitrogen Fixation and Photosynthesis

Question: An organism that relies exclusively on pre-synthesized food molecules is
[A].

autotrophic

[B].

photosynthetic

[C].

prokaryotic

[D].

heterotrophic

Answer: Option D

Explanation:

No answer description available for this question.

Question: A group of about 300 chlorophyll molecule acting together to trap photons and transfer energy to the pigment molecule at the reaction center may be called as
[A].

harvesting unit

[B].

reaction center

[C].

photosynthetic unit

[D].

chloromass

Answer: Option C

Explanation:

No answer description available for this question.

Question: Chlorophyll is associated with
[A].

thylakoids

[B].

stroma

[C].

cristae

[D].

matrix

Answer: Option A

Explanation:

No answer description available for this question.

Question: In the Calvin cycle of C3 plants, which molecule is the acceptor of CO2?
[A].

Erythrose-4-phosphate

[B].

Ribulose-l,5-diphosphate

[C].

Ribose-5-phosphate

[D].

Alpha-ketoglutarate

Answer: Option B

Explanation:

No answer description available for this question.

Question: Organisms capable of converting N2 to NO3 are
[A].

yeasts

[B].

bacteria

[C].

roundworms

[D].

moulds

Answer: Option B

Explanation:

No answer description available for this question.

Question: A major plant macronutrient found in nucleic acids and proteins is
[A].

calcium

[B].

nitrogen

[C].

sulphur

[D].

iron

Answer: Option B

Explanation:

No answer description available for this question.

Question: During nitrogen fixation the enzyme nitrogenase catalyse the reaction. The reaction is high energy demanding which require approximately
[A].

12 ATP

[B].

18 ATP

[C].

25 ATP

[D].

7 ATP

Answer: Option B

Explanation:

No answer description available for this question.

Question: Nitrosomonous and Nitrobacter obtain their carbon for growth from
[A].

organic compounds

[B].

carbon dioxide

[C].

elementary carbon

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: In the presence of carbon monoxide, nitrogen fixation
[A].

increases

[B].

decreases

[C].

inhibits

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.