Plant Physiology MCQ: MCQ Test (25 questions)

Question 1 of 25

Which of the following gas is absorbed during photosynthesis ?

AN2
BCO2
CO2
DWater vapour

Question 2 of 25

Which of the following structures of a plant responsible for transpiration ?

AXylem
BRoot
CStomata
DBark

Question 3 of 25

What is the importance of respiration in plant-

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

Question 4 of 25

Which one of the following statement is false?

APhotosynthesis occur in presence of sunlight
BCO2 is used during photosynthesis
CO2 is used during photosynthesis
DO2 comes out during photosynthesis

Question 5 of 25

Gibberelling bring about-

AYellowing of leaves
BPromotion of rooting
CElongation of genetically dwarf plants
DDwarfing of genetically tall plants

Question 6 of 25

What is the role of Pneumatophores ?

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

Question 7 of 25

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 8 of 25

Fermentation is-

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

Question 9 of 25

Which equation shows the reaction of photosynthesis ?

ACO2 + H2O — CH2O + O2
B6CO2 + 12H2O — C6H12O6 + 6O2 + 6H2O
C6CO2 + 6H2O — C6H12O6 + 6O2
DC6H12O6 + 6O2 — 6CO2 + 6H2O

Question 10 of 25

Thigmotropism is best exhibited by-

ALamina
BTendrils
CRoot apex
DThorn

Question 11 of 25

Different steps in respiration are controlled by-

AAuxins
BSugar
CEnzymes
DKinins

Question 12 of 25

The net gain of energy grom one gram mole of glucose during aerobic respiration is-

A2 ATP
B4 ATP
C38 ATP
D40 ATP

Question 13 of 25

First step of photosynthesis is-

AActivation of chlorophyll by sunlight
BOxygen comes out from water
CFormation of carbohydrate
DFixation of carbon dioxide

Question 14 of 25

Ethylene is-

AA gaseous metabolites
BA gaseous enzyme
CA gaseous harmone
DA solid harmone

Question 15 of 25

Mitochondria are store house of-

AGlycogen
BGlucose
CATP
DFats

Question 16 of 25

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 17 of 25

Consider the following statements-n1. Molasses is a by-product of sugar production process.n2. Bagasse obtained in the sugar mills is used as a fuel in the boilers to generate steam for factories.nSugar can only be produced from sugarcane as the raw material.nWhich of these statement are correct ?

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

Question 18 of 25

After respiration the conversion of energy is mainly in the form of-

AADP
BATP
CAMP
DGlucose

Question 19 of 25

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 20 of 25

Maximum transpiration occur in-

AAlgal cells
BXerophytic plants
CHydrophytic plants
DMesophytic plants

Question 21 of 25

Plant cell kept in hypertonic solution will get-

ALysed
BTurgid
CDeplasmolysed
DPlasmolysed

Question 22 of 25

Transpiration is regulated by movement of-

AGuard Cells
BSubsidiary Cell
CEpidermal Cell
DMesophyll Cells

Question 23 of 25

ATP mean -

AAdesino tri phosphate
BAdenine tri phosphate
CAdenosine tri phosphate
DAdenosine tetraphosphate

Question 24 of 25

Food is preserved at low temperature because-

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

Question 25 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.