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Biotechnology
‣
Nitrogen Fixation and Photosynthesis
Comments
Question
Organisms capable of converting N
2
to NO
3
are
Options
A. yeasts
B. bacteria
C. roundworms
D. moulds
Correct Answer
bacteria
Nitrogen Fixation and Photosynthesis problems
Search Results
1. Chlorophyll is associated with
Options
A. thylakoids
B. stroma
C. cristae
D. matrix
Show Answer
Scratch Pad
Discuss
Correct Answer: thylakoids
2. Which of the following bacteria genus is capable of oxidizing ammonia (NH
4
)?
Options
A. Nitrospina
B. Nitrobacter
C. Nitrosococcus
D. Nitrosobacter
Show Answer
Scratch Pad
Discuss
Correct Answer: Nitrosococcus
3. During nitrogen fixation the enzyme nitrogenase catalyse the reaction. The reaction is high energy demanding which require approximately
Options
A. 12 ATP
B. 18 ATP
C. 25 ATP
D. 7 ATP
Show Answer
Scratch Pad
Discuss
Correct Answer: 18 ATP
4. Which of the following molecule is produced from the fixation of CO
2
in C4 plants?
Options
A. Malate
B. Oxaloacetate
C. Pyruvate
D. Alpha-ketoglutarate
Show Answer
Scratch Pad
Discuss
Correct Answer: Oxaloacetate
5. What is the metal ligand in chlorophylls?
Options
A. Copper (Cu)
B. Iron (Fe)
C. Magnesium (Mg)
D. Manganese (Mn)
Show Answer
Scratch Pad
Discuss
Correct Answer: Magnesium (Mg)
6. The chief source of nitrogen for green plants is
Options
A. atmospheric nitrogen
B. nitrates
C. ammonium salts
D. low molecular weight- organic nitrogenous compound
Show Answer
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Discuss
Correct Answer: nitrates
7. In the presence of carbon monoxide, nitrogen fixation
Options
A. increases
B. decreases
C. inhibits
D. none of these
Show Answer
Scratch Pad
Discuss
Correct Answer: inhibits
8. Nitrosomonous and Nitrobacter obtain their carbon for growth from
Options
A. organic compounds
B. carbon dioxide
C. elementary carbon
D. none of these
Show Answer
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Discuss
Correct Answer: carbon dioxide
9. What type of long chain alcohol is esterified to plant chlorophyll molecules?
Options
A. Dolichol
B. Farnesol
C. Phytol
D. None of these
Show Answer
Scratch Pad
Discuss
Correct Answer: Phytol
10. 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
Options
A. harvesting unit
B. reaction center
C. photosynthetic unit
D. chloromass
Show Answer
Scratch Pad
Discuss
Correct Answer: photosynthetic unit
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