Photochemical Reactions and Photosynthesis MCQs

By: Prof. Dr. Fazal Rehman | Last updated: November 27, 2024

1. The principal laws of photochemistry are _______________

(A). Lambert’s and Beer’s law
(B). Raoult’s and Dalton’s law
(C). Raoult’s and Henry’s law
(D). Grothus-Draper and Stark-Einstein law
(E). None of these

Multiple Choice Question Answer: d

2. Why are the Medicine bottles often made with darkened glass?

(A). to allow oxidation of drug
(B). to allow the photodegradation of drug
(C). to reduce the cost
(D). to prevent the drug from photodegradation
(E). None of these

Multiple Choice Question Answer: d

3. In photosynthesis, the energy of the sun is converted into chemical energy in which of the following forms?

(A). ATP and NADP
(B). ADP and NADPH
(C). ATP and NADPH
(D). ADP and NADP
(E). None of these

Multiple Choice Question Answer: c

4. The nutrient that is not used in cellular respiration is __________

(A). carbohydrates
(B). fiber
(C). fatty acids
(D). amino acids
(E). None of these

Multiple Choice Question Answer: b

5. Ozone is formed by which of the following dissociations of molecular oxygen into individual oxygen atoms?

(A). ionic
(B). thermochemical
(C). thermal
(D). photochemical
(E). None of these

Multiple Choice Question Answer: d

6. Mercaptans are produced by the photochemical addition of which of the following to the alpha-olefins?

(A). sulphur
(B). hydrogen sulphide
(C). hydrogen
(D). paraffins
(E). None of these

Multiple Choice Question Answer: b

7. Not a stage in photosynthesis is ___________

(A). phosphorous fixation
(B). generation of ATP
(C). carbon fixation
(D). absorption of light
(E). None of these

Multiple Choice Question Answer: a

8. In the photochemistry of photosynthesis, NADPH stands for which of the following?

(A). Nicotinamide Amine Dinucleotide Phosphatic hydrogen
(B). Nicotinamide Amine Dinucleotide Phosphate
(C). Nicotinamide Adenine Dinucleotide Phosphatic hydrogen
(D). Nicotinamide Adenine Dinucleotide Phosphate
(E). None of these

Multiple Choice Question Answer: d

9. Photosynthesis is called the photochemical process.

(A). False
(B). True
(E). None of these

Multiple Choice Question Answer: b

10. Not an example of a photoautotroph is _________

(A). human beings
(B). plants
(C). cyanobacteria
(D). bacteria
(E). None of these

Multiple Choice Question Answer: a

11. In photosynthesis, ATP stands for which of the following?

(A). Amine Triphosphate
(B). Adenosine Triphosphate
(C). Amine tri poly phosphate
(D). Ammonium Triphosphate
(E). None of these

Multiple Choice Question Answer: b

12. In which of the following reactions do the molecules absorbing light not react but induce the other molecules to react?

(A). Irreversible
(B). Thermal
(C). Photosensitized
(D). Dark
(E). None of these

Multiple Choice Question Answer: c

13. Vision is always initiated by which of the following photochemical reactions?

(A). Mercapton
(B). Hydrogen Chloride
(C). Rhodopsin
(D). Enzymes
(E). None of these

Multiple Choice Question Answer: c

14. All organisms always carry out photosynthesis by using carbon dioxide as a source of the carbon atoms.

(A). false
(B). true
(E). None of these

Multiple Choice Question Answer: a

15. In the photochemical reactions, the absorption of which of the following radiations takes place?

(A). only visible
(B). radio
(C). ultraviolet and visible
(D). visible and x-rays
(E). None of these

Multiple Choice Question Answer: c

16. Which of the following are the reactions that are caused by the heat and in the absence of light?

(A). Photochemical reactions
(B). Reversible photochemical reaction
(C). Reversible reaction
(D). Dark reactions
(E). None of these

Multiple Choice Question Answer: d

17. In photochemical reactions, the presence of light is never required for the reaction to take place.

(A). false
(B). true
(E). None of these

Multiple Choice Question Answer: a

18. An example of a photochemical reaction is __________

(A). Formation of NaOH
(B). Decomposition of ammonia
(C). Photosynthesis
(D). Decomposition of HCl
(E). None of these

Multiple Choice Question Answer: c

19. In photosynthesis, RuBP stands for which of the following?

(A). Ribulose phosphate
(B). Ribulose urea Biphosphate
(C). Ribulose Bisphosphate
(D). Ribulose biurea phosphate
(E). None of these

Multiple Choice Question Answer: c

20. In photosynthesis, carbon dioxide is converted into sugar by _______

(A). sugar fixation process
(B). carbon reduction process
(C). carbon fixation process
(D). photolysis process
(E). None of these

Multiple Choice Question Answer: c

 

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