Nitrogen Fixation and Photosynthesis MCQs : This section focuses on the "Nitrogen Fixation and Photosynthesis". These Multiple Choice Questions (MCQs) should be practiced to improve the Nitrogen Fixation and Photosynthesis skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
What is the metal ligand in chlorophylls?
A. Copper (Cu)
B. Iron (Fe)
C. Magnesium (Mg)
D. Manganese (Mn)
Question 2
Chlorophyll is associated with
A. thylakoids
B. stroma
C. cristae
D. matrix
Question 3
What type of long chain alcohol is esterified to plant chlorophyll molecules?
A. Dolichol
B. Farnesol
C. Phytol
D. None of these
Question 4
Which of the following molecule is produced from the fixation of CO2 in C4 plants?
A. Malate
B. Oxaloacetate
C. Pyruvate
D. Alpha-ketoglutarate
Question 5
Nitrosomonous and Nitrobacter obtain their carbon for growth from
A. organic compounds
B. carbon dioxide
C. elementary carbon
D. None of these
Question 6
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
Question 7
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
Question 8
Plants absorb nitrates from soil and convert them into
A. urea
B. ammonia
C. nitrogen
D. None of these
Question 9
Which of the following aid plants in the acquisition of nitrogen from nitrogen gas of the atmosphere?
A. Bacteria
B. Algae
C. Nematodes
D. Moulds
Question 10
An organism that relies exclusively on pre-synthesized food molecules is
A. autotrophic
B. photosynthetic
C. prokaryotic
D. heterotrophic
Question 11
The chief source of nitrogen for green plants is
A. atmospheric nitrogen
B. nitrates
C. ammonium salts
D. low molecular weight- organic nitrogenous compound
Question 12
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
Question 13
Organisms capable of converting N2 to NO3 are
A. yeasts
B. bacteria
C. roundworms
D. moulds
Question 14
A major plant macronutrient found in nucleic acids and proteins is
A. calcium
B. nitrogen
C. sulphur
D. iron
Question 15
In the presence of carbon monoxide, nitrogen fixation
A. increases
B. decreases
C. inhibits
D. None of these
Question 16
Which of the following bacteria genus is capable of oxidizing ammonia (NH4)?
A. Nitrospina
B. Nitrobacter
C. Nitrosococcus
D. Nitrosobacter