49 + Mcqs in Plant Physiology in SRMJEEE Page 1 McqOptions

1.	The most widely used chemical for protoplast fusion, as fusogens, is
A.	Manitol
B.	Sorbitol
C.	Mannol
D.	Poly ethylene glycol (PEG)
Answer» E.

Discussion

2.	DMSO (Dimethyl sulfoxide) is used as
A.	Gelling agent
B.	alkaylating agent
C.	Chelating agent
D.	Cryoprotectant
Answer» E.

Discussion

3.	Hormone pair required for a callus to differentiate are
A.	auxin and cytokinin
B.	auxin and ethylene
C.	auxin and absiccic acid
D.	cytokinins and gibberllin
Answer» B. auxin and ethylene

Discussion

4.	Synthetic seed is produced by encapsulating somatic embryo with
A.	sodium chloride
B.	sodium alginate
C.	sodium acetate
D.	sodium nitrate
Answer» C. sodium acetate

Discussion

5.	The production of secondary metabolites require the use of
A.	protoplast
B.	cell suspension
C.	meristem
D.	auxillary buds
Answer» C. meristem

Discussion

6.	Who is the father of tissue culture?
A.	Bonner
B.	Haberlandt
C.	Laibach
D.	Gautheret
Answer» C. Laibach

Discussion

7.	In plant cell, digestion of fats occurs with the help of
A.	lysosomes
B.	Peroxisomes
C.	glyoxisomes
D.	microtubules
Answer» D. microtubules

Discussion

8.	The final acceptor of electrons in the electron transport chain is
A.	Water
B.	Oxygen
C.	Hydrogen
D.	Cytochrome b
Answer» C. Hydrogen

Discussion

9.	The net gain of ATP produced during the oxidation of one glucose molecule in a plant cell
A.	38 ATP molecules
B.	30 ATP molecules
C.	36 ATP molecules
D.	24 ATP molecules
Answer» D. 24 ATP molecules

Discussion

10.	During respiration yeast converts glucose to
A.	ethanol and water
B.	ethanol and oxygen
C.	ethanol and CO2
D.	lactic acid and CO2
Answer» C. ethanol and CO2

Discussion

11.	Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzymes:
A.	carboxylase
B.	phosphatase
C.	dehygrogenase
D.	carboxylase and dehygrogenase
Answer» E.

Discussion

12.	R.Q. of fatty substances is generally:
A.	unity
B.	Zero
C.	more than one
D.	less than one
Answer» E.

Discussion

13.	In succulent xerophytes the R.Q is :
A.	Zero
B.	unity
C.	less than one
D.	more than one
Answer» B. unity

Discussion

14.	Common immediate source of energy in cellular activity:
A.	NAD
B.	ATP
C.	DNA
D.	RNA
Answer» C. DNA

Discussion

15.	Kreb’s cycle take place in
A.	vesicles of ER
B.	Mitochondrial matrix
C.	lysosomes
D.	Dictyosomes
Answer» C. lysosomes

Discussion

16.	The annual plant exchange of gases takes place mainly through
A.	Leaf scars
B.	lenticels
C.	stomata
D.	stem
Answer» D. stem

Discussion

17.	Respiration is
A.	Anabolic process
B.	Exothermic process
C.	Endothermic process
D.	Endergonic process
Answer» C. Endothermic process

Discussion

18.	The site of glycolysis in a cell is
A.	chloroplast
B.	nucleus
C.	cytoplasm
D.	mitochondria
Answer» D. mitochondria

Discussion

19.	Respiratory enzymes are located in
A.	mitochondrial matrix
B.	cristae
C.	perimitochondrial space
D.	outer membrane
Answer» C. perimitochondrial space

Discussion

20.	The process of respiration in green plants occurs
A.	only when stomata are open
B.	only when photosynthesis ceases
C.	only when photosynthesis is in progress
D.	At all times
Answer» E.

Discussion

21.	Which element is required for Nodulation in Legumes?
A.	Mn
B.	Fe
C.	Mo
D.	B
Answer» D. B

Discussion

22.	The most widely accepted theory accepted to explain the translocation of carbohydrates in higher plants
A.	Root pressure theory
B.	Osmotic theory
C.	Imbibition theory
D.	Mass flow theory
Answer» E.

Discussion

23.	First experiments related to the method of hydroponics were done by
A.	Knop
B.	Sachs
C.	Arnon
D.	Hill
Answer» C. Arnon

Discussion

24.	Which of the following is essential for Nitrogen Fixation by leguminous plants?
A.	Chlorophyll
B.	Leghaemoglobin
C.	Anthocyanin
D.	Phycocyanin
Answer» C. Anthocyanin

Discussion

25.	Ion can be accumulated against concentration gradient due to?
A.	Mass flow
B.	Active uptake
C.	Passive uptake
D.	Donnan equilibrium
Answer» C. Passive uptake

Discussion

26.	Which of the following bacterium brings about denitrification?
A.	Pseudomonas
B.	Rhizobium
C.	Azotobacter
D.	Nitrobacter
Answer» B. Rhizobium

Discussion

27.	Bacteroid means
A.	dead bacteria
B.	living bacteria
C.	A bacteria like substance
D.	living bacteria but cannot divide
Answer» E.

Discussion

28.	Plant absorb the element nitrogen in the form
A.	nitrogen gas
B.	nitrites
C.	nitrates
D.	nitric acid
Answer» D. nitric acid

Discussion

29.	Plant require Fe and Mg for
A.	Synthesis of chlorophyll
B.	Opening and closing of stomata
C.	Translocation of carbohydrates
D.	None of these
Answer» B. Opening and closing of stomata

Discussion

30.	Molybdenum is involved in plant metabolism in
A.	Translocation of solutes
B.	Tryptophan synthesis
C.	ABA synthesis
D.	Nitrate reduction
Answer» E.

Discussion

31.	Hydroponics is
A.	Growing of aquatic plants
B.	Growing off floating aquatic plants
C.	Soilless cultivation of plants
D.	Growing of plants inside water
Answer» D. Growing of plants inside water

Discussion

32.	Little leaf disease is due to the deficiency of
A.	Nitrogen
B.	Zinc
C.	Manganese
D.	Molybdenum
Answer» C. Manganese

Discussion

33.	The disease “die back of shoots” is caused due to the deficiency of the following microelements
A.	Copper
B.	Chlorine
C.	Manganese
D.	Molybdenum
Answer» B. Chlorine

Discussion

34.	The essential element for the synthesis of auxin is
A.	Zinc
B.	Sulphur
C.	Potassium
D.	Phosphorus
Answer» B. Sulphur

Discussion

35.	Which of the following is necessary for biological nitrogen fixation?
A.	Copper
B.	Zinc
C.	Manganese
D.	Molybdenum
Answer» E.

Discussion

36.	Stomata open at night and close during day time in
A.	Xerophytes
B.	Mesophytes
C.	Succulents
D.	Hydrophytes
Answer» D. Hydrophytes

Discussion

37.	Transpiration is least in
A.	High atmospheric humidity
B.	good soil moisture
C.	high wind velocity
D.	dry environment
Answer» B. good soil moisture

Discussion

38.	Which one of the following is used for measuring the rate of transpiration?
A.	Porometer
B.	Osmometer
C.	Moll’s experiment
D.	Potometer
Answer» E.

Discussion

39.	What is the action spectrum of transpiration?
A.	Orange and red
B.	Green and ultraviolet
C.	Blue and red
D.	None of these
Answer» D. None of these

Discussion

40.	Which of the following is an anti-transpirant
A.	PMA
B.	PAN
C.	IAA
D.	AUG
Answer» B. PAN

Discussion

41.	Water absorption takes place through
A.	Lateral roots
B.	Root cap
C.	Root hairs
D.	Tap root
Answer» D. Tap root

Discussion

42.	The hormone which signals the closure of stomata is
A.	Auxins
B.	Cytokinine
C.	Gibberelline
D.	Abscisic acid
Answer» E.

Discussion

43.	Active uptake of minerals by roots mainly depends on the
A.	Availability of oxygen
B.	Temperature
C.	Light
D.	Availability of CO2
Answer» B. Temperature

Discussion

44.	Cooling of plants is caused by
A.	Guttaion
B.	Photorespiration
C.	Transpiration
D.	Assimilation
Answer» D. Assimilation

Discussion

45.	The marine animals that kept in fresh water burst. It shows the process of
A.	Exosmosis
B.	Endoosmosis
C.	Plasmolysis
D.	Deplasmolysis
Answer» C. Plasmolysis

Discussion

46.	Plasmolysis occurs due to
A.	Absorption
B.	Osmosis
C.	Endoosmosis
D.	Exosmosis
Answer» E.

Discussion

47.	Loss of water from the stomata of leaves are known as
A.	Guttation
B.	Exudation
C.	Transpiration
D.	Evaporation
Answer» D. Evaporation

Discussion

48.	The water potential of pure water at atmospheric pressure is
A.	-2.3 bar
B.	+2.3 bar
C.	Zero bar
D.	One bar
Answer» D. One bar

Discussion

49.	The water readily available to plants for absorption by roots is
A.	Gravitational water
B.	Capillary water
C.	Rain water
D.	Hygroscopic water
Answer» C. Rain water

Discussion

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The most widely used chemical for protoplast fusion, as fusogens, is

DMSO (Dimethyl sulfoxide) is used as

Hormone pair required for a callus to differentiate are

Synthetic seed is produced by encapsulating somatic embryo with

The production of secondary metabolites require the use of

Who is the father of tissue culture?

In plant cell, digestion of fats occurs with the help of

The final acceptor of electrons in the electron transport chain is

The net gain of ATP produced during the oxidation of one glucose molecule in a plant cell

During respiration yeast converts glucose to

Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzymes:

R.Q. of fatty substances is generally:

In succulent xerophytes the R.Q is :

Common immediate source of energy in cellular activity:

Kreb’s cycle take place in

The annual plant exchange of gases takes place mainly through

Respiration is

The site of glycolysis in a cell is

Respiratory enzymes are located in

The process of respiration in green plants occurs

Which element is required for Nodulation in Legumes?

The most widely accepted theory accepted to explain the translocation of carbohydrates in higher plants

First experiments related to the method of hydroponics were done by

Which of the following is essential for Nitrogen Fixation by leguminous plants?

Ion can be accumulated against concentration gradient due to?

Which of the following bacterium brings about denitrification?

Bacteroid means

Plant absorb the element nitrogen in the form

Plant require Fe and Mg for

Molybdenum is involved in plant metabolism in

Hydroponics is

Little leaf disease is due to the deficiency of

The disease “die back of shoots” is caused due to the deficiency of the following microelements

The essential element for the synthesis of auxin is

Which of the following is necessary for biological nitrogen fixation?

Stomata open at night and close during day time in

Transpiration is least in

Which one of the following is used for measuring the rate of transpiration?

What is the action spectrum of transpiration?

Which of the following is an anti-transpirant

Water absorption takes place through

The hormone which signals the closure of stomata is

Active uptake of minerals by roots mainly depends on the

Cooling of plants is caused by

The marine animals that kept in fresh water burst. It shows the process of

Plasmolysis occurs due to

Loss of water from the stomata of leaves are known as

The water potential of pure water at atmospheric pressure is

The water readily available to plants for absorption by roots is