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Free download in PDF Plant Physiology Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries.
41
Translocation of carbohydrate nutrients usually occurs in the form of
[A]
glucose
[B]
maltose
[C]
starch
[D]
sucrose
42
Maximum solar energy is trapped by
[A]
planting trees
[B]
cultivating crops
[C]
growing algae in tanks
[D]
growing grasses
Answer: growing algae in tanks
43
Stomata open and close due to
[A]
circadian rhythm
[B]
genetic clock
[C]
pressure of gases inside the leaves
[D]
turgor pressure of guard cells
Answer: turgor pressure of guard cells
44
Phytochrome is involved in
[A]
phototropism
[B]
photorespiration
[C]
photoperiodism
[D]
geotropism
45
Minerals absorbed by root move to the leaf through
[A]
xylem
[B]
phloem
[C]
sieve tubes
[D]
none of the above
46
The size of chlorophyll molecule is
[A]
head 15 x 15 A, tail 25 A
[B]
head 20 x 20 A, tail 25 A
[C]
head 15 x 15 A, tail 20 A
[D]
head 10 x 12 A, tail 25 A
Answer: head 15 x 15 A, tail 20 A
47
The substrate for photorespiration is
[A]
phosphoglyceric acid
[B]
glycolate
[C]
serine
[D]
glycine
48
In C4 plants, Calvin cycle operates in
[A]
stroma of bundle sheath chloroplasts
[B]
grana of bundle sheath chloroplasts
[C]
grana of mesophyll chloroplasts
[D]
stroma of mesophyll chloroplasts
Answer: stroma of bundle sheath chloroplasts
49
Greatest producers of organic matter are
[A]
crop plants
[B]
forests
[C]
plants of the land area
[D]
phytoplankton of oceans
Answer: phytoplankton of oceans
50
A very efficient converter of solar energy with net productivity of 204 kg/m2 or more is the crop
[A]
wheat
[B]
sugarcane
[C]
rice
[D]
bajra
51
A bottle filled with previously moistened mustard seeds and water was screw capped tightly and kept in a corner. It blew up suddenly after about half an hour. The phenomenon involved is
[A]
diffusion
[B]
imbibition
[C]
osmosis
[D]
D.P.D.
52
The principal pathway of water translocation in angiosperms is
[A]
sieve cells
[B]
sieve tube elements
[C]
xylem vessel system
[D]
xylem and phloem
Answer: xylem vessel system
53
Which of the following movement is not related to auxin level?
[A]
bending of shoot towards light
[B]
movement of root towards soil
[C]
nyctinastic leaf movements
[D]
movement of sunflower head tracking the sun
Answer: nyctinastic leaf movements
54
Phototropic and geotropic movements are linked to
[A]
gibberellins
[B]
enzymes
[C]
auxin
[D]
cytokinins
55
Abscisic acid controls
[A]
cell division
[B]
leaf fall and dormancy
[C]
shoot elongation
[D]
cell elongation and wall formation
Answer: leaf fall and dormancy
56
Phytohormones are
[A]
chemical regulation flowering
[B]
chemical regulation secondary growth
[C]
hormones regulating growth from seed to adulthood
[D]
regulators synthesised by plants and influencing physiological processes
Answer: regulators synthesised by plants and influencing physiological processes
57
Highest auxin concentration occurs
[A]
in growing tips
[B]
in leaves
[C]
at base of plant organs
[D]
in xylem and phloem
58
Kranz anatomy is typical of
[A]
C4 plants
[B]
C3 plants
[C]
C2 plants
[D]
CAM plants
59
Which one is a C4-plant?
[A]
papaya
[B]
pea
[C]
potato
[D]
maize/corn
60
The first carbon dioxide acceptor in C4-plants is
[A]
phosphoenol-pyruvate
[B]
ribulose 1, 5-diphosphate
[C]
oxalo-acetic acid
[D]
phosphoglyceric acid
Answer: phosphoenol-pyruvate
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