1) Transfer of amino group from one amino acid to the keto group of keto acid is catalysed by
A) Transaminase
B) Glutamate dehydrogenase
C) Nitrate reductase
D) Nitrogenase
2) Function of pink pigment leghae moglobin present in root nodules of leguminous plants is to regulate
A) Co 2 supply in cells
B) Mo supply in cells
C) O 2 supply in cells
D) production of phenolic compounds
3) Amides are transported to other parts of the plant via
A) Xylem vessels
B)Phloem sieve tubes
C) phloem companion cells
D) both B & C
4) Reaction of Ketoglutaric acid with ammonia to form glutamic acid is
A) Reductive deamination
B) Reductive amination
C) Transamination
D) Ammonification
5) ( A) : The deficiency symptoms of nitrogen, potassium and magnesium are visible first in the senescentleaves.
(R) : In the older leaves , biomolecules containing N , K & Mg are broken down , making these elements available for mobilising to Younger leaves
a) If both A & R are true and R is the correct explanation of the A
b) If both A & R are true but R is not the correct explanation of the A
c) If A is true , but R is false
d) If both A & R are false
6) ( A) : Nitrogen is a limiting nutrient for both natural and agricultural ecosystems
(R) : Plants competes with microbes for the limited ( very little) nitrogen that is available in soil
a) If both A & R are true and R is the correct explanation of the A
b) If both A &R are true but R is not the correct explanation of the A
c) If A is true , but R is false
d) If both A & R are false
7) ( A): Only certain prokaryotic species are capable of fixing nitrogen
(R) : The enzymes nitrogenase which is capable of nitrogen reduction is present exclusively in prokaryotes
a) If both A &R are true and R is the correct explanation of the A
b) If both A & R are true but R is not the correct explanation of the A
c) If A is true , but R is false
d) If both A & R are false
8) ( A) : Rhizobium lives as aerobes under free-living conditions but during nitrogen fixing events, they-becomes anaerobic
( R) : The enzyme nitrogenase is highly sensitive to the molecular oxygen
a) If both A & R are true and R is the correct explanation of the A
b) If both A & R are true but R is not the correct explanation of the A
c) If A is true , but R is false
d) If both A & R are false
9) The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?
A) Manganese & Potassium
B) Magnesium & Molybdenum
C) Magnesium & Chlorine
D) Manganese & Chlorine
10) Minerals known to be required in large amount for plant growth include
A) Potassium, phosphorus, selenium, boron
B) Magnesium, sulphur, iron, zinc
C) Phosphorus , potassium, sulphur , calcium
D) Calcium, magnesium, manganese , copper
11) “die back disease ” in citrus plant is caused by the deficiency of
A) Zinc
B) Copper
C) manganese
D) Boron
12) Lecithin carrier theory of mineral absorption was proposed by
A) Pfeffer in 1900
B) Lundegardh and Burstrom in 1993
C) Bennet Clark in 1956
D) Lundegardh and Pfeffer in 1964
13) The first nif genes were isolated from
A) Klebsiella aerogenosa
B) Klebsiella axytoca
C) Klebsiella pneumonia
D) Klebsiella granulomatis
14) Phytotron is meant for
A) Controlled irradiation
B) Induction of mutations
C) Controlled humidity
D) Growing plants under controlled environment
15) `A crop plant which can grow in nitrogen deficient soils without external supply of it is
A)Allium sativum
B) Gossypium herboceum
C) Cajanus cajan
D) Helianthus annus
16) Match the columns:
Column I Column Ii
a) Aerobic 1) frankia
b) Cyanobacteria 2)Azospirillum
c) Casuarina 3) Clostridium
d) Tropical grasses 4) Aulosira
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