Q1. The rate of photosynthesis is controlled by

• A) the rate of light reaction
• B) the rate of dark reaction
• C) the rates of both light and dark reactions
• D) none of the above

Q2. The end product of the Calvin cycle is ______.

• A) RuBP
• B) PGAL
• C) PGA
• D) ADP + NADP

Q3. The primary carbon dioxide acceptor in C4 cycle is

• A) malic acid
• B) phosphoenol pyruvate
• C) rubisco
• D) aspartic acid

Q4. The law of limiting factor was given by

• A) Calvin
• B) Blackman
• C) Priestley
• D) None of these

Q5. The metabolic pathway which produces carbohydrate is

• A) Calvin cycle
• B) Glycolysis
• C) Cyclic electron pathway
• D) Krebs cycle

Q6. Manganese is required in

• A) Chlorophyll synthesis
• B) Nucleic acid synthesis
• C) Plant cell wall formation
• D) Photolysis of water during photosynthesis

Q7. Oxidative phosphorylation refers to

• A) Anaerobic production of ATP
• B) The citric acid cycle production of ATP
• C) Production of ATP by chemiosmosis
• D) Alcoholic fermentation

Q8. Which of the following is not an accessory pigment?

• A) Carotene
• B) Chlorophyll a
• C) Chlorophyll b
• D) Xanthophyll

Q9. Besides water and CO2, which is more essential a raw material for food formation

• A) light
• B) oxygen
• C) NAD
• D) mineral salt

Q10. In actively gro – wing young plants, the best data for estimating the rate of photosynthesis would be

• A) ratio of oxygen evolved to carbon dioxide absorbed
• B) increase in fresh weight
• C) increase in dry weight
• D) increase in carbohydrate

Q11. Discovery of Emerson effect has already shown the

• A) two distinct photochemical reactions
• B) light and dark reactions of photosynthesis
• C) photophosphorylation
• D) photorespiration

Q12. Translocation of sugar in flowering plants occurs in the form of

• A) glucose
• B) sucrose
• C) starch
• D) maltose

Q13. Where are thylakoids and grana located?

• A) Lysosomes
• B) Mitochondria
• C) Chloroplasts
• D) Golgi apparatus

Q14. Who enunciated the law of limiting factor for photosynthesis?

• A) Robert Emerson
• B) Ruben
• C) Blackman
• D) Calvin

Q15. Which one of the following statement is true for ATP?

• A) ATP is prosthetic part of an enzyme
• B) ATP is an enzyme
• C) ATP is organic ions of enzyme
• D) ATP is a Co-enzyme

Q16. Kranz anatomy is a feature of

• A) C3 plants
• B) CAM plants
• C) C4 plants
• D) All of these

Q17. Which of the following is a 4-carbon compound?

• A) Oxaloacetic acid
• B) Phosphoglyceric acid
• C) Ribulose biphosphate
• D) Phosphoenolpyruvate

Q18. Which of the following process (C4 cycle) occurs in bundle sheath cells?

• A) Regeneration
• B) Fixation
• C) Carboxylation
• D) Decarboxylation

Q19. Light reactions of photosynthesis occurs in

• A) stroma
• B) thylakoid
• C) grana
• D) cytoplasm of cell

Q20. Water stress causes

• A) opening of stomata
• B) increase in metabolic rate
• C) wilting of leaves
• D) lesser availability of carbon dioxide

Q21. During photochemical reaction of photosynthesis–

• A) liberation of O2 takes place
• B) Formation of ATP and NADPH2 take place
• C) Liberation of O2, formation of ATP, and NADPH2 takes place
• D) Assimilation of CO2 takes place

Q22. In the half-leaf experiment of photosynthesis, KOH solution is used because

• A) It provides O2 to the leaf.
• B) It provides moisture to the leaf.
• C) t helps in CO2 fixation
• D) It absorbs CO2

Q23. Structurally, chlorophyll a and b are different as

• A) Chl a has a methyl group and Chl b has an aldehyde group.
• B) Chl a has an aldehyde group and Chl b has a methyl group.
• C) Chl a has an ethyl group and Chl b has an aldehyde group
• D) Chl a has a carboxyl group and Chl b has an aldehyde group.

Q24. Fixation of one CO2 molecule through Calvin cycle requires:

• A) 1 ATP and 2NADPH2
• B) 2ATP and 2NADPH2
• C) 3ATP and 2NADPH2
• D) 2ATP and 1NADPH2

Q25. Which one of the following statements about cytochrome P-450 is wrong?

• A) It is a colored cell
• B) It is an enzyme involved in oxidation reaction
• C) It has an important role in metabolism
• D) It contains iron