Plant Physiology MCQ: MCQ Test (50 questions)

Question 1 of 50

Hydathodes occur on-

AStem
BLeaves
CRoot
DAll of these

Question 2 of 50

Thigmotropism is best exhibited by-

ALamina
BTendrils
CRoot apex
DThorn

Question 3 of 50

Mitochondria are store house of-

AGlycogen
BGlucose
CATP
DFats

Question 4 of 50

The maximum fixation of solar energy is done by-

ABacteria
BProtozoa
CFungi
DGreen plants

Question 5 of 50

Water avilable in soil for the root of Plant is-

ACapillary Water
BGravitational Water
CHygroscopic Water
DNone of these

Question 6 of 50

The loss of water in the form of water drops is called-

ATranspiration
BRespiration
CGuttation
DExosmosis

Question 7 of 50

The process in which water is split during photosynthesis is-

APhotolysis
BHydrolysis
CPlasmolysis
DHemolysis

Question 8 of 50

First compound which is fixed during photosynthesis is-

APhosphoglyceric acid
BStarch
CGlucose
DDiphosphoglyceric acid

Question 9 of 50

Fermentation is-

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

Question 10 of 50

Krebs cycle is-

AAerobic
BAnaerobic
CAnabolic
DNone of the above

Question 11 of 50

Willting of plants occurs due to excessive :

AAbsorption
BTranspiration
CRespiration
DGuttation

Question 12 of 50

Water passes from the soil into the roots by a physical process called-

ADiffusion
BTranspiration
CAbsorption of CO2
DOsmosisn(e) None of the above/more than one of above

Question 13 of 50

Water exadation through hydathodes is-

AGuttation
BTranspiration
CHydrolysis
DExcretion

Question 14 of 50

Respiration is-

ACatabolic process that uses carbon dioxide, produce oxygen and converted released energy to ATP
BAnabolic process that uses oxygen and carbon dioxide to form ATP
CAnabolic process that uses oxygen, produces carbon dioxide and converts released energy into ATP
DCatabolic process that uses oxygen, produces carbon dioxide and converts released energy into ATP

Question 15 of 50

Maximum amount of energy (ATP) is liberated on oxidation of-

AFats
BProtein
CStarch
DVitamin

Question 16 of 50

Transpiration in plants is a process of-

APhotorespiration
BWater loss
CFood production
DRespiration

Question 17 of 50

Plant cooling occurs due to-

AAssimilation
BGuttation
CPhotorespration
DTranspiration

Question 18 of 50

Photosynthesis proceeds in sequence of -

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

Question 19 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 20 of 50

In plant body, the water and minerals are transported by-

ABast
BCollenchyma
CParenchyma
DXylem

Question 21 of 50

Stomata Generally open during-

ADay time
BDuring night
CNot open
DNone of these

Question 22 of 50

Leaf fall can be prevented with the help of-

AAbcisic acid
BAuxins
CFlorigen
DCytokinins

Question 23 of 50

Dwarfness can be controlled by treating the plant with-

ACytokinin
BGibberellic acid
CAuxin
DAntigibberellin

Question 24 of 50

Which one of following statements is correct about harmone ?

AIt is a organic compound which control the growth of plant
BIt is a special kind of organic compound found in small amount which control metabolic activity and growth of plant
CIts different concentration have different effect on different organ
DAll of these

Question 25 of 50

The oxygen in photosynthesis is released from-

ACO2
BH2O
CBoth CO2 & H2O
DChlorophyll

Question 26 of 50

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

APhotosynthesis
BRespiration
CTranspiration
DFermentation

Question 27 of 50

Leaf of mimosa groops down on touching because of-

AWater loss from leaflet base
BChange in water concentration
CLoss of water from cell to intercellular space in pulvins and pulvinules
DAll of these

Question 28 of 50

Absorption of water by root occure in the region of-

ARoot cap
BCell elongation
CRoot hairs
DCell division

Question 29 of 50

Growth movement in plant due to light is called-

AGeotropism
BPhototropism
CHydrotropism
DThigmotropism

Question 30 of 50

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

ACO2
BO2
CMineral salt
DNAD

Question 31 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 32 of 50

Role of chlorophyll in photosynthesis-

AAbsorption of water
BAbsorption of light energy
CAbsorption of CO2
DNone of these

Question 33 of 50

The plant growth regulators are small, simple molecules of diverse chemical composition. They are-

Acarbohydrates, fats and proteins
Bindole compounds, adenine derivatives, carotenoids and terpenes
Cfatty acids, glucose and vitamins
Dvitamin-C, vitamin-D and glucose

Question 34 of 50

Plant cell kept in hypertonic solution will get-

ALysed
BTurgid
CDeplasmolysed
DPlasmolysed

Question 35 of 50

Carbon dioxide is released by plant during -

APhotosynthesis
BAsent of sap
CTranspiration
DRespiration

Question 36 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 37 of 50

Which of the following statement is/are correct regarding vegetative propagation of plants ?n1. Vegetative propagation produces clonal population.n2. Vegetative propagation helps in eliminating the virus.n3. Vegetative propagation can be practiced most of the year.nSelect the correct answer using the code given below :

A1 only
B2 and 3 only
C1 and 3
D1, 2 and 3

Question 38 of 50

Highest concentration of auxin occurs-

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

Question 39 of 50

Food is preserved at low temperature because-

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

Question 40 of 50

Respiration can occur in the absence of oxygen in-

ASolanum tubersosum
BSpirogyra
CYeast
DAll the above

Question 41 of 50

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

AMagnesium
BPhosphorus
CIron
DCalcium

Question 42 of 50

What is the importance of respiration in plant-

AIt liberates energy
BIt provides O2 to plants
CIt liberates CO2
DAll the above

Question 43 of 50

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

ANastic movement
BTactic movement
CTropic movement
DMutation

Question 44 of 50

The elements known as primary nutrients for plants

ANitrogen, Phosphorus and Potassium
BNitrogen, Oxygen and Silicon
CPotassium, Boron and Nitrogen
DNitrogen, Phosphorus and Iron

Question 45 of 50

Respiration is-

AEndothermic process
BExothermic process
CAnabolic process
DEndagenic process

Question 46 of 50

Which one can respire in absence of oxygen ?

ASeeds
BLeaves
CStem
DRoot

Question 47 of 50

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

AAlmond
BCycus
CGround nut
DMustrad

Question 48 of 50

Transpiration is regulated by movement of-

AGuard Cells
BSubsidiary Cell
CEpidermal Cell
DMesophyll Cells

Question 49 of 50

Fruit ripening is accelerated by-

AWarm surroundings
BIncreased nitrogen supply
CReduced water supply
DEthylene rich atmosphere

Question 50 of 50

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