Plant Physiology MCQ: MCQ Test (25 questions)

Question 1 of 25

Growth movement in plant due to light is called-

AGeotropism
BPhototropism
CHydrotropism
DThigmotropism

Question 2 of 25

Name a biological process in which glucose and fat is oxidised to librate energy-

APhotosynthesis
BRespiration
CTranspiration
DFermentation

Question 3 of 25

Photosynthesis proceeds in sequence of -

ADark phase and light phase
BLight phase alone
CLight phase and dark phase
DDark phase alone

Question 4 of 25

Coversion of starch to sugar is essential for-

AStomatal opening
BStomatal closing
CStomatal formation
DStomatal growth

Question 5 of 25

Incomplete break down of sugar in anaerobic respiration form-

AFructose and water
BGlucose and CO2
CAlcohol and CO2
DWater and CO2

Question 6 of 25

Movement in plant induced by external stimuli-

ATactic movement
BNastic movement
CAutonomic movement
DParatonic movement

Question 7 of 25

Example of positive geotropism is-

AClosing of flower
BUpward growth of stem
CDownward growth of root
DLateral growth of root

Question 8 of 25

Which of the following statement is correct regarding auxin ?

AIt inhibits the falling of leaf
BIt destroy weeds
CIt permote apical growth
DAll of above

Question 9 of 25

Indole acetic acid is-

AEnzyme
BFungicides
CAmino acid
DAuxins

Question 10 of 25

Which of the following gas is absorbed during photosynthesis ?

AN2
BCO2
CO2
DWater vapour

Question 11 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 12 of 25

ln plants which one of the following gases is released during photosynthesis ?

ACarbon dioxide
BOxygen
CHydrogen
DMethane

Question 13 of 25

An element present in chlorophyll-

ACa
BFe
CMg
DS

Question 14 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 15 of 25

Transpiration differ from evaporation in-

ARate of water loss
BTranspiration is a physiological process while evaporation is physical process.
CTranspiration is physical process while evaporation is a physiological process.
DFrequency of water loss.

Question 16 of 25

Plant cell kept in hypertonic solution will get-

ALysed
BTurgid
CDeplasmolysed
DPlasmolysed

Question 17 of 25

In which of the following part of the cell as the pyruvic acid is broken down into carbon dioxide, water and energy ?

ACytoplasm
BNucleus
CMitochondria
DChloroplast

Question 18 of 25

ATP is -

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

Question 19 of 25

Water exadation through hydathodes is-

AGuttation
BTranspiration
CHydrolysis
DExcretion

Question 20 of 25

Chemicals having profound effect on growth and development are-

AEnzyms
BPhyto harmones
CCatalytic agents
DManure

Question 21 of 25

Respiration can occur in the absence of oxygen in-

ASolanum tubersosum
BSpirogyra
CYeast
DAll the above

Question 22 of 25

Which one of the following plants produces seed but not fruit ?

AAlmond
BCycus
CGround nut
DMustrad

Question 23 of 25

Movements of leaves of the sensitive plant mimosa pundica are due to-

AThermonasty
BSeismonasty
CPhotonasty
DNyctinasty

Question 24 of 25

Carbon dioxide is released by plant during -

APhotosynthesis
BAsent of sap
CTranspiration
DRespiration

Question 25 of 25

Photoperiodism affects-

AFlowering
BFruiting
CVegetative growth
DAll of these