Plant Physiology MCQ: MCQ Test (50 questions)

Question 1 of 50

Condition in which rate of transpiration increases-

ALow velocity of wing
BLow Humidity and high temperature
CHigh humidity
DExcess amount of water in soil

Question 2 of 50

Consider the following plants-n1. Bougainvillea 2. Carnationsn3. Cocoa 4. GrapesnWhich of these plants are propagated by stem cutting ?

A1 & 2
B2, 3 & 4
C1, 3 & 4
D1, 2, 3 & 4

Question 3 of 50

Leaves are green because they

AAbsorb green light
BDo not absorb but reflect green light
CUtilise green light
DAbsorb and reflect green light

Question 4 of 50

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

ACarbon dioxide
BOxygen
CHydrogen
DMethane

Question 5 of 50

What is the type of movement that occurs during opening and closing of flower ?

ANastic movement
BTactic movement
CTropic movement
DMutation

Question 6 of 50

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 7 of 50

Highest concentration of auxin occurs-

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

Question 8 of 50

The maximum fixation of solar energy is done by-

ABacteria
BProtozoa
CFungi
DGreen plants

Question 9 of 50

Indole acetic acid is-

AEnzyme
BFungicides
CAmino acid
DAuxins

Question 10 of 50

Closure of lid pitcher plant is a-

ATropic movement
BTurgor movement
CParatonic movement
DAutonomic movement

Question 11 of 50

Incomplete break down of sugar in anaerobic respiration form-

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

Question 12 of 50

What is the role of Pneumatophores ?

AProtect plant from animals
BGet oxygen for respiration
CSupport plant in standing upright
DHelps plant for pollination

Question 13 of 50

Maximum transpiration occur in-

AAlgal cells
BXerophytic plants
CHydrophytic plants
DMesophytic plants

Question 14 of 50

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 15 of 50

Which of the following gas is absorbed during photosynthesis ?

AN2
BCO2
CO2
DWater vapour

Question 16 of 50

An instrument for measuring the rate of transpiration :

APorometer
BHygrometer
CPotometer
DPsychrometer

Question 17 of 50

Photoperiodism affects-

AFlowering
BFruiting
CVegetative growth
DAll of these

Question 18 of 50

ATP mean -

AAdesino tri phosphate
BAdenine tri phosphate
CAdenosine tri phosphate
DAdenosine tetraphosphate

Question 19 of 50

Pyruvic acid is formed at the end of-

ACalvin cycle
BGlycolysis
CKreb cycle
DPentose

Question 20 of 50

In mitochondria ATP synthesis occurs-

AAt the outer membrane
BAt the cristae
CIn the matrix
DIn the intra cristal space

Question 21 of 50

Which one of the following plant plastids stores starch, oil and protein granules ?

AChloroplast
BLeucoplast
CChromoplast
DXanthoplast

Question 22 of 50

Food products are kept in cold storage or refrigeration in order to-

AMake the tasty
BUse in off season
CMaintenance of ffreshness, longevity and teste due to low respiration
DKeep them cool

Question 23 of 50

If the stem grows towards sunlight, and root grow just opposite to it, stem movement is called-

ANegative phototrophic movement
BPhototrophic movement
CPositive phototrophic movement
DNone of these

Question 24 of 50

ATP is -

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

Question 25 of 50

2-4-D is a-

AInsecteside
BExplosive
CFungicides
DWeedicides

Question 26 of 50

Assertion (A) : Cellulose is used in making shatter proof glass.nReason (R) : Polysaccharides are not soluble in water.nCodes :

ABoth a and R is true and R is correct explanation of A
BBoth A and R is true, but R is not correct explanationof A
CA is True, but R is false
DA is false, but R is true

Question 27 of 50

Food is preserved at low temperature because-

ABacterial attack is minimise
BFor easy cooking
CFor easy digestion
DAll the above

Question 28 of 50

The leaves of mimosa pundica droop down on touch because-

APlant have nervous system
BThe leaf are very tender
CThe leaf tissue are injured
DThe turgor pressure of leaf base changed

Question 29 of 50

For the growth of plants in length, which of the following is not essential ?

ACalcium
BSodium
CNitrogen
DPhosphorus

Question 30 of 50

Which one of the following elements is present in green pigment of leaf ?

AMagnesium
BPhosphorus
CIron
DCalcium

Question 31 of 50

Translocation of carbohydrate nutrient usually occurs in the form of-

AGlucose
BMaltose
CStarch
DSucrose

Question 32 of 50

Absorption of water by root occure in the region of-

ARoot cap
BCell elongation
CRoot hairs
DCell division

Question 33 of 50

Mitochondria are store house of-

AGlycogen
BGlucose
CATP
DFats

Question 34 of 50

During rainy seasons door made up of wood swell up due to-

ADiffusion
BOsmosis
CImbibition
DPlasmolysis

Question 35 of 50

Stomata Generally open during-

ADay time
BDuring night
CNot open
DNone of these

Question 36 of 50

In Plant water is transported through-

ACambium
BPhloem
CXylem
DEpidermis

Question 37 of 50

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 38 of 50

Respiration is found in-

AIn all living cell in light
BAll living cell in dark
CIn all living cell both in light and dark
DOnly in non green cells both in light and dark

Question 39 of 50

The process of taking in CO2 by plant and releasing O2 is component of-

ATranspiration
BRespiration
CEndosmosis
DPhotosynthesis

Question 40 of 50

Growth in plant occur-

AWhole life
BFor definite period
CGrowth does not takes place on plant
DNone of these

Question 41 of 50

The process in which water is split during photosynthesis is-

APhotolysis
BHydrolysis
CPlasmolysis
DHemolysis

Question 42 of 50

Parthenocarpy fruit is obtained by sprying phytoharmone-

AZeafin
BABA
CAuxins
DKinetin

Question 43 of 50

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 44 of 50

Which one of the following is the process involved in photosynthesis ?

APotential energy is related to from free energy
BFree energy is converted into Potential energy and stored
CFood is oxidized to release carbon dioxide and water
DOxygen is taken and carbon dioxide and water vapour are given out

Question 45 of 50

Transpiration help in-

ATranspiration of minerals
BAscent of sap
CCooling
DAll of these

Question 46 of 50

IAA was first isolated from-

ACorn germ oil
BGibberella
CHuman urine
DRhizopus

Question 47 of 50

Which part of plant helps in holding the plant firmly into the soil ?

ALeaves
BFruit
CStem
DRoots

Question 48 of 50

Movement in plant induced by external stimuli-

ATactic movement
BNastic movement
CAutonomic movement
DParatonic movement

Question 49 of 50

Beside water and light which is more essential as a raw material for photosynthesis ?

ACO2
BO2
CMineral salt
DNAD

Question 50 of 50

Photosynthesis organelles found in plant cell-

AMitochondria
BGolgi bodies
CChloroplast
DLysosomes