Plant Physiology MCQ: MCQ Test (25 questions)

Question 1 of 25

Osmosis Involves-

ADiffusion of suspended particle from higher to lower Concentration.
BDiffusion of suspended particle from lower to higher concentration.
CDiffusion of water from more to less concentrated side.
DDiffusion of water from less to more concentrated side.

Question 2 of 25

ATP is -

AAn enzyme which during about oxidation
BHarmone
CA protein
DA molecule which contain high energy phosphate bond

Question 3 of 25

Aerobic respiration rakes place-

AIn presence of O2
BIn absence of oxygen
CIn presence of CO2
DIn absence of CO2

Question 4 of 25

Leaf fall can be prevented with the help of-

AAbcisic acid
BAuxins
CFlorigen
DCytokinins

Question 5 of 25

The Crescograph, a device for measuring growth in plants, was invented by-

AHyder Ali
BSatyendra Bose
CSubrahmanyan Chandrasekhar
DJagadish Chandra Bose

Question 6 of 25

With reference to the movement of molecules of fluid in plant, consider the following statements-n1. Diffusion is the movement of molecules of a substance from the region of their higher concentration to the region of their lower concentration.n2. Osmosis is a process in which the water molecules move through a semipermeable membrane from the region of their lower concentration to the region of their higher concentration.nWhich of the above statements is/are correct ?

A1 only
B2 only
CBoth 1 and 2
DNeither 1 nor 2

Question 7 of 25

Vaseline was applied to both surfaces of the leaves of a plant. Which of the following process/processes would be affected ?n1. Photosynthesis 2. Rspiration 3. TranspirationnSelect the correct answer using the code given below :

A1 and 3 only
B2 only
C2 and 3 only
D1, 2 and 3

Question 8 of 25

A twing kept in water having some salt remain fresh for longer period due to-

ADecrease in bacterial degradation
BExosmosis
CDecrease in transpiration rate
DAbsorption of more water

Question 9 of 25

Compensation point is the value of a factor where there is-

ABeginning of photosynthesis
BLittle photosynthesis
CPhotosynthesis equal to rate of respiration
DNeither photosynthesis nor respiration

Question 10 of 25

Indole acetic acid is-

AEnzyme
BFungicides
CAmino acid
DAuxins

Question 11 of 25

Growth movement in plant due to light is called-

AGeotropism
BPhototropism
CHydrotropism
DThigmotropism

Question 12 of 25

End product of aerobic respiration are-

ASugar and oxygen
BCarbon dioxide, water and energy
CWater and energy
DCarbon dioxide and energy

Question 13 of 25

In plant energy is produced during the process of-

APhotosynthesis
BTranspiration
CRespiration
DWater absorption

Question 14 of 25

Movement in plant induced by external stimuli-

ATactic movement
BNastic movement
CAutonomic movement
DParatonic movement

Question 15 of 25

Chemicals having profound effect on growth and development are-

AEnzyms
BPhyto harmones
CCatalytic agents
DManure

Question 16 of 25

Which of the following is not a plant hormone ?

AGibberellic
BAuxins
CCytokinins
DThyroxin

Question 17 of 25

Water movement against gravity is caused by-

AImbibition
BTranspiration
COsmosis
DDiffusion

Question 18 of 25

Photoperiodism affects-

AFlowering
BFruiting
CVegetative growth
DAll of these

Question 19 of 25

Fruit drop occurs when fruit has-

ANo auxin as in the stem
BLess auxin as compared to stem
CMore auxin than the one present in the stem
DAuxin concentration equal to that of stem

Question 20 of 25

Auxin suppresses the growth of-

ALateral axillary buds
BApical buds
CRoots on stem cuttings
DParthenocarpy

Question 21 of 25

In anaerobic respiration-

AOxygen is absorbed
BOxygen is released
CCarbon dioxide is released
DCarbon dioxide is absorbed

Question 22 of 25

Fermentation is-

AAnearobic respiration
BIncomplete oxidation of carbohydrate
CComplete oxidation of carbohydrate
DNone of these

Question 23 of 25

Transpiration in plants is a process of-

APhotorespiration
BWater loss
CFood production
DRespiration

Question 24 of 25

Photosynthesis takes place in the presence of chlorophyll and……

AWater
BNutrients
CCarbondioxide
DSunlight

Question 25 of 25

Highest concentration of auxin occurs-

AIn growing tops
BIn leaves
CAt the base of plant organs
DIn xylem & phloem