Life Processes Worksheet-25

Life Processes Worksheet-25

Multiple Choice questions:

11. In a typical leaf, photosynthesis occurs mainly in

(a) Chorenchyma                         (b) Epidermis

(c) Cuticle                                      (d) Complex tissue

12. During light phase, light energy is assimilated in the form of:

(a) ATP                                          (b) NADPH

(c) Both (a) and (b)                      (d) none of the above

13. A cell that lacks chloroplast does not                  

(a) Evolve CO₂                              (b) Liberate Oxygen

(c) Require water                         (d) Utilize carbohydrates

14. Photosynthesis takes place in             

(a) Chloroplast                              (b) Centriole

(c) Nucleus                                     (d) endoplasmic reticulum

15. Which of the following gas is used in photosynthesis?

(a) Oxygen                                     (b) Hydrogen

(c) Nitrogen                                   (d) Carbon dioxide

16. The process of photosynthesis occurs by

(a) carbondioxide and water

(b) Carbondioxide, water and chlorophyll

(c) water, chlorophyll, sunlight

(d) water, carbon dioxide, chlorophyll and sunlight

17. The process in which light energy is converted into chemical energy is called

(a) Photorespiration                    (b) Photosynthesis

(c) Photophosphorylation          (d) Phototropism

18. Oxygen evolved during photosynthesis comes from

(a) CO₂                                           (b) H₂O

(c) CO₂ and H₂O                           (d) salts

19. The first step in photosynthesis is

(a) Ionization of water                 (b) Fixation of CO₂

(c) Formation of ATP                   (d) Excitation of chlorophyll

20. Chlorophyll molecule appears green because it

(a) Reflects green                         (b) Absorbs green

(c) Absorbs blue and red            (d) Transmits blue and red

21. The rate of photosynthesis is highest during:

(a) Early morning                         (b) late evening

(c) Noon                                          (d) Night

22. Role of oxygen in photosynthesis is as a:

(a) Reactant                                  (b) Product

(c) By product                               (d) Catalyst

Answer Key:

11. (a)
12. (c)
13. (b)
14. (a)
15. (d)
16. (d)
17. (c)
18. (b)
19. (d)
20. (a)
21. (c)
22. (c)