MERIT YARD

[Photosynthesis in Higher Plants - JAC VVI MCQs - MERIT YARD]

Question 1 / 40Photosynthesis is a ________ process.

A) Physical

B) Chemical

C) Physico-chemical

D) Biological

Question 2 / 40Who demonstrated that photosynthesis is essentially a light-dependent reaction?

A) Joseph Priestley

B) Jan Ingenhousz

C) Cornelius van Niel

D) T.W. Engelmann

Question 3 / 40The reaction center of PS II is:

A) P700

B) P680

C) P600

D) P800

Question 4 / 40Where does the light reaction occur in the chloroplast?

A) Grana / Thylakoids

B) Stroma

C) Cytoplasm

D) Inner membrane

Question 5 / 40Splitting of water (Photolysis) is associated with:

A) PS I only

B) PS II only

C) Stroma lamellae

D) Both PS I and PS II

Question 6 / 40The first stable product of C3 cycle is:

A) OAA

B) 3-PGA

C) RuBP

D) PEP

Question 7 / 40Kranz anatomy is characteristic of:

A) C3 plants

B) C4 plants

C) CAM plants

D) All plants

Question 8 / 40Primary CO2 acceptor in C4 plants is:

A) RuBP

B) PEP

C) PGA

D) OAA

Question 9 / 40In which part of the chloroplast does the C3 cycle occur?

A) Thylakoids

B) Stroma

C) Grana

D) Lumen

Question 10 / 40The most abundant enzyme in the world is:

A) PEPcase

B) RuBisCO

C) ATPase

D) Catalase

Question 11 / 40Photorespiration occurs in which plants?

A) C3 plants

B) C4 plants

C) Both

D) Only cacti

Question 12 / 40Z-scheme describes the process of:

A) Dark reaction

B) Non-cyclic photophosphorylation

C) Cyclic photophosphorylation

D) Photorespiration

Question 13 / 40Cyclic photophosphorylation results in the formation of:

A) ATP only

B) ATP and NADPH

C) NADPH only

D) ATP, NADPH and O2

Question 14 / 40Law of Limiting Factors was proposed by:

A) Calvin

B) Blackman

C) Hatch and Slack

D) Priestley

Question 15 / 40Which metal ion is present in the center of Chlorophyll?

A) Iron

B) Calcium

C) Magnesium

D) Manganese

Question 16 / 40Action spectrum was first described using which algae?

A) Cladophora

B) Chlorella

C) Spirogyra

D) Ulothrix

Question 17 / 40Number of ATP required for fixing one molecule of CO2 in C3 cycle:

A) 2

B) 3

C) 5

D) 12

Question 18 / 40How many turns of the Calvin cycle are needed to form one glucose molecule?

A) 1

B) 3

C) 6

D) 12

Question 19 / 40In C4 plants, RuBisCO is present in which cells?

A) Mesophyll cells

B) Bundle sheath cells

C) Epidermal cells

D) Stomata

Question 20 / 40The primary stable product of C4 cycle is:

A) PGA

B) OAA (Oxaloacetic acid)

C) Malic acid

D) PEP

Question 21 / 40PS I and PS II are connected by:

A) Grana lamellae

B) Electron Transport System

C) Stroma

D) Calvin cycle

Question 22 / 40Atmospheric CO2 concentration is a limiting factor for:

A) C3 plants

B) C4 plants

C) Both

D) None

Question 23 / 40Which of the following pigments is yellow-orange?

A) Chlorophyll a

B) Chlorophyll b

C) Carotenoids

D) Xanthophylls

Question 24 / 40Chemiosmotic hypothesis was given by:

A) Blackman

B) Peter Mitchell

C) Calvin

D) Hill

Question 25 / 40Which region of visible light shows maximum photosynthesis?

A) Blue and Red

B) Green and Yellow

C) Indigo and Violet

D) Red and Green

Question 26 / 40In C4 plants, PEPcase is found in:

A) Mesophyll cells

B) Bundle sheath cells

C) Phloem

D) Xylem

Question 27 / 40Dark reaction is also known as:

A) Photo-oxidation

B) Carbon fixation

C) Photolysis

D) Hill reaction

Question 28 / 40Total number of NADPH used for one glucose molecule in Calvin cycle:

A) 6

B) 12

C) 18

D) 30

Question 29 / 40Warburg effect is related to:

A) Light intensity

B) Oxygen concentration

C) CO2 concentration

D) Temperature

Question 30 / 40Bundle sheath cells of C4 plants have:

A) Large chloroplasts without grana

B) Small chloroplasts with grana

C) No chloroplasts

D) Large chloroplasts with grana

Question 31 / 40In CAM plants, CO2 fixation occurs during:

A) Night

B) Day

C) Morning

D) Noon

Question 32 / 40Product of Light reaction used in Dark reaction:

A) ATP and NADPH

B) O2 and ATP

C) Water and CO2

D) Only Oxygen

Question 33 / 40Which pigment is universal in all oxygen-evolving photosynthetic organisms?

A) Chlorophyll a

B) Chlorophyll b

C) Chlorophyll c

D) Bacteriochlorophyll

Question 34 / 40Maximum CO2 fixation on Earth is carried out by:

A) Phytoplankton / Algae

B) Rain forests

C) Crop plants

D) C4 plants

Question 35 / 40Carbon atom of CO2 enters the Calvin cycle via:

A) Reduction

B) Carboxylation

C) Regeneration

D) Oxidation

Question 36 / 40In C4 plants, CO2 is transported from Mesophyll to Bundle sheath as:

A) Malic acid / Aspartic acid

B) PEP

C) Pyruvic acid

D) CO2 gas

Question 37 / 40Water splitting complex is associated with which side of thylakoid?

A) Inner side / Lumen

B) Outer side / Stroma

C) Within membrane

D) Not fixed

Question 38 / 40The C4 pathway is also called:

A) Calvin cycle

B) Hatch and Slack pathway

C) Citric acid cycle

D) Glycolysis

Question 39 / 40Which factor does not directly affect photosynthesis?

A) Light

B) CO2

C) Water

D) Chlorophyll a size

Question 40 / 40Regeneration of 1 molecule of RuBP requires:

A) 1 ATP

B) 2 ATP

C) 1 NADPH

D) 3 ATP