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MULTIPLE
CHOICE QUESTIONS (MCQ’S)
1.
Transpiration
is least in:
a) Good
soil moisture
b) Dry environment
c) High
wind velocity
d)
High atmospheric humidity
2.
Phytochrome
is involved in:
a) Phototropism
b) Photorespiration
c) Photoperiodism
d) Geotropism
3. Carbon dioxide joins
the photosynthetic pathway in:
a) PS I
b) PS II
c) Light reaction
d) Dark reaction.
4.
NADP+ is reduced to NADPH in:
a) PS I
b) PS II
c) Calvin cycle
d) Non cyclic photophos phorylation
5.
Minerals
absorbed by root move to the leaf through.
a) Xylem
b) Phloem
c) Sieve tubes
d) None of the above
6.
Which one
increases in the absence of light?
a) Uptake of
minerals
b) Uptake of water
c) Elongation of internodes
d) Ascent of sap
7.
Greatest
producers of organic matter are:
a) Crop plants
b) Forests
c) Plants of the land area
d) Phytoplankton of oceans
8.
The
first carbon dioxide acceptor in C4-plants is:
a) Phosphoenol-pyruvate
b) Ribulose 1, 5-diphosphate
c) Oxalo-acetic acid
d) Phosphoglyceric acid
9.
The most
widely accepted theory for ascent of sap in trees is:
a) Pulsating action of
living cell
b) Role of atmospheric pressure
c) Capillarity
d) Transpiration pull and cohesion theory of Dixon and
Jolly
10.
Photosynthetic
pigments found in the chloroplasts occur in:
a) Thylakoid
membranes
b) Plastoglobules
c) Matrix
d) Chloroplast envelope
11.
Dark reactions
of photosynthesis occur in:
a) Granal
thylakoid membranes
b) Stromal lamella membranes
c) Stroma outside photosynthetic lamellae
d) Periplastidial space
12.
Water movement
between cells is due to:
a) T.P.
b) W.P.
c) D.P.D.
d) Incipient plasmolysis
13.
In terrestrial
habitats, temperature and rainfall conditions are influence by:
a) Water
transformations
b) Transpiration
c) Thermoperiodism
d) Translocation
14.
The enzyme
that catalyses carbon dioxide fixation in C4 plants is:
a) RuBP carboxylas
b) PEP carboxylase
c) Carbonic anhydrase
d) Carboxydismutase
15.
Photosystem II
occurs in:
a) Stroma
b) Cytochrome
c) Grana
d) Mitochondrial surface
16.
Chlorophyll a occurs in:
a) All photosynthetic autotrophs
b) In all higher plants
c) Help retain chlorophyll
d) Inhibit protoplasmic streaming
17.
Translocation
of carbohydrate nutrients usually occurs in the form of:
a) Glucose
b) Maltose
c) Starch
d) Sucrose
18.
Which one is a
C4-plant?
a)
Papaya
b) Pea
c) Potato
d)
Maize/corn
19.
The carbon dioxide acceptor in
Calvin cycle/ C3-plants is:
a) Phospho-enol pyruvate (PEP)
b) Ribulose 1, 5-diphosphate (RuBP)
c) Phosphoglyceric acid (PGA)
d) Ribulose monophosphate (RMP)
20. The primary acceptor, during C02 fixation in C3 paints,
is:
a) Phosphoenolpyruvate (PEP)
b) Ribulose 1, 5-diphosphate (RuDP)
c) Phosphoglyceric acid (PGA)
d) Ribulose monophosphate (RMP)
21. Anthranilic acid is an immediate precursor of formation
of:
a) Tyrogine
b) Tryptophas
c) Ornithine
d) Methiodine
22. Tropane nucleus is a combination of:
a) Pyrolidine and piperidine
b) Pyrolidine and pyridine
c) Pyrolidine and oscine
d) Piperidine and Oscine
23. The recemic form of hyoscyamine is known as:
a) Hyoscine
b) Oscine
c) Atropine
d) Ecoganine
24. An alkaloid which contains Isoquinoline ring system:
a) Papaverine
b) Quinine
c) Strychine
d) Reserpine
25. The precursor of Indole alkaloids is:
a) Ornithine
b) Phenylalarine
c) Tryptophan
d) N-methionine
26. Pyrrole and pyridine ring present in:
a) Atropine
b) Digitoxin
c) Vinblastine
d) Quinidine
27. The Important precursor for the production of
streroidal drugs is:
a) Diosgin
b) Diosgenin
c) Digoxin
d) Digitoxin
28. Steroidal Saponins are biosynthesised via:
a) Shikimic acid pathway
b) Calvin's Cycle
c) Aceto acetate pathway
d) Mevalonic acid pathway
29. Which of the following is precursor for biosynthesis of
atropine?
a) L-Ornithine
b) Tryptophan
c) Tyrosine
d) Cholesterol
Answer KEY
1. d 2. c 3.
d 4. d 5. a 6. c 7. d 8.
a 9. d 10. a
11. c 12. c 13.b 14.
b 15. c 16.c 17. d 18.
d 19. b 20.b
21. b 22. a 23.c 24. a 25. c 26.c 27. b 28. d 29. a
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