1.For photosynthesis (i.e. for the synthesis of organic matter), the green plants need only .
(a) Light
(b) Chlorophyll
(c) CO2
(d) All of these
Answer
Ans.(d)
2. For synthesis of a molecule of glucose, the requirement of ATP and NADPH is respectively
(a) 15 and 10
(b) 33 and 22
(c) 12 and 8
(d) 18 and 12
Answer
Ans.(d)
3. Formation of ATP in photosynthesis and respiration is an oxidation process which utilizes the energy from
(a) Cytochromes
(b) Ferredoxin
(c) Electrons
(d) Carbon dioxide
4. Grana refer to
Answer
Ans.(c)
(a) Stacks of thylakoids in plastids of higher plants
(b) A constant in quantum equation
(c) Glycolysis of glucose
(d) By-product of photosynthesis
Answer
Ans.(a)
5. Greatest producers of organic matter are
(a) Crop plants
(b) Forests
(c) Plants of the land area
(d) Phytoplankton of oceans
Answer
Ans.(d)
6. Hill’s reaction takes place in
(a) Dark
(b) Light
(c) Dark and light both
(d) At any time
Answer
Ans.(b)
7. How many Calvin cycles form one hexose molecule
(a) 2
(b) 6
(c) 4
(d) 8
Answer
Ans.(b)
8. In a electron transport chain in terminal oxidation the cytochrome which donates electrons to O2 is
(a) Cytochrome b
(b) Cytochrome c
(c) Cytochrome a3
(d) Cytochrome a
Answer
Ans.(c)
9. In bacterial photosynthesis, the hydrogen donor is
(a) H2O
(b) H2SO4
(c) NH3
(d) H2S
Answer
Ans.(d)
10. In blue-green algae photosystem-II contain an important pigment concerned with photolysis of water it is called
(a) B earotene
(b) Chlorophyll’ b’
(c) Cytochrome ‘c’
(d) Phycocyanin
Answer
Ans.(d)
11. In C3 plants first stable product of photosynthesis during dark reactions is
(a) PGA
(b) PGAL
(c) RuBP
(d) Oxalo acetic acid
Answer
Ans.(a)
12. In C4 pathway or C4 photosynthesis carbobn dioxide fication occures in chloroplast of
(a) Palisade tissue
(b) Spongy mesophyll
(c) Bundle sheath
(d) Guard cells
Answer
Ans.(b)
13. In C4 plants, Calvin cycle operates in
(a) Stroma of bundle sheath chloroplasts
(b) Grana of Bundle sheath chloroplasts
(c) Grana of mesophyll chloroplasts
(d) Stroma od mesophyll chloraplasts
Answer
Ans.(a)
14. In C4 plants, initial carbondioxide fixation occurs on chloroplasts of
(a) Palisade tissue
(b) Spongy parnchyma
(c) Guard cells
(d) Hypodermis and chlorenchyma
Answer
Ans.(b)
15. In C4 plants, synthesis of sugars/ final CO2 fixation occurs in
(a) Palisade cells
(b) Spongy cells
(c) Undifferentiated mesophyll cells
(d) Bundle sheath cells
Answer
Ans.(d)
16. In case of C4 pathway
(a) CO2 combines with PGA
(b) CO2 combines with PEP
(c) CO2 first combines with RuBP
(d) CO2 combines with RMP
Answer
Ans.(b)
17. In chlorophyll ‘a’, third carbon of second pyroll ring is attached with
(a) Carboxyl group
(b) Magnesium
(c) Methyl group
(d) Aldehyde group
Answer
Ans.(c)
18. In normal chloroplast, the percentage of chlorophyll is
(a) 50%
(b) 75%
(c) 5-10%
(d) 95%
Answer
Ans.(c)
19. In photosynthesis, oxygen is liberated due to
(a) Reduction of carbon dioxide
(b) Hydrolysis os carbohydrate
(c) Photolysis of water
(d) Breakdown of chlorophyll
Answer
Ans.(c)
20. In pigment system II, active chlorophyll is
(a) P680
(b) P700
(c) P673
(d) P720
Answer
Ans.(a)
21. In which of the following the rate of photosynthesis is decreased and is known as red drop
(a) Blue light
(b) Green light
(c) Red light more than 680 nm
(d) Red light less than 680 nm
Answer
Ans.(c)
22. Intact chloroplast from green leaves cab be isolated by
(a) Acetone
(b) Ethanol
(c) Alcohol
(d) Sugar solution
Answer
Ans.(a)
23. Isotopes employed to study photosynthesis are
(a) 11C and 32P
(b) 15C and 32P
(c) 16C and 15O
(d) 14C and 18O
Answer
Ans.(d)
24. Isotopes popularly known to have been used in the study of photosynthesis are
(a) C14 and O18
(b) C11 and C32
(c) C16 and N15
(d) P32 and C15
Answer
Ans.(a)
25. Kranz anatomy is typical of
(a) C4 plants
(b) C3 plants
(c) C2 plants
(d) CAM plants
Answer
Ans.(a)
26. Light energy is conveted into chemical energy in the presence of
(a) Pyrenoids
(b) Chloroplasts
(c) Ribosomes
(d) Mesosomes
Answer
Ans.(b)
27. Light is necessary during photosynthesis for
(a) Evolution of hydrogen
(b) Photolysis of water
(c) Heating
(d) Breakdown of chlorophyll
Answer
Ans.(b)
28. Maize, sugarcane and some other tropical plants have high efficiency of CO2 fixation because they operate
(a) Calvin cycle
(b) Hatch – Slack cycle
(c) TCA cycle
(d) PP pathway
Answer
Ans.(b)
29. Make suitable pair<p> (A) Emerson effect – (a) C4 cycle
(B) Hill reaction – (b) Photolysis
(C) Calvin’s cycle – (c) C3 cycle
(D) Hatch and Slack cycle – (d) Photosystem-I & II
(a) Aa, Bb, Cc, Dd
(b) Aa, Bc, Cd Da
(c) Ac, Bd, Ca, Db
(d) Ad, Bb, Cc, Da
Answer
Ans.(d)
30. Most effective wavelength of light for photosynthesis is
(a) green
(b) Violet
(c) Red
(d) Yellow
Answer
Ans.(c)
31.NADP is reduced to NADPH in
(a) PSI
(b) PSII
(c) Calvin cycle
(d) Noncyclic photophosphorylation
Answer
Ans.(d)
32.Nine-tenth of all photosynthesis of world (85-90%) is carried out by
(a) Large trees with millions of branches and levess
(b) Algae of the ocean
(c) Chlorophyll containing ferns of the forest
(d) Scientist in the laboratories
Answer
Ans.(b)
33.Nobel prize was awarded to the scientist for discovering the pathway of carbon assimilation
(a) Watson
(b) Krebs
(c) Calvin
(d) Parnas
Answer
Ans.(c)
34.Number of calvin cycles required to generate a molecule of hexose is
(a) 2
(b) 4
(c) 6
(d) 8
Answer
Ans.(c)
35.One sixth part of the total PGAL produced is used for synthesis of
(a) Glucose
(b) RuBP
(c) RuMP
(d) DHAP
Answer
Ans.(a)
36.Oxidative phosphorylation occurs during the process of
(a) Protein synthesis
(b) N2 fixation
(c) Respiration
(d) Transpiration
Answer
Ans.(b)
37.Oxygen containing carotenoids are
(a) Carotenes
(b) Xanthophylls
(c) Phycobilins
(d) Anthocyanins
Answer
Ans.(b)
38.Oxygen liberated during photosynthesis comes from
(a) CO2
(b) Glucose
(c) H2O
(d) Fructose
Answer
Ans.(c)
39.P700 is a special from of which pigment
(a) Chlorophyll-b
(b) Carotenes
(c) Chlorophyll-a
(d) Phycobilins
Answer
Ans.(c)
40.Path of dark reaction of photosynthesis was traced through the use of
(a) 32P
(b) 14CO2
(c) 18O2
(d) X-rays
Answer
Ans.(b)
41.In the calvin cycle, the assimilatory power is used during
(A) Formation of PGA
(B) Conversion of PGA to PGAL
(C) Formation of fructose 1-6 diphsophate from PGAL
(D) Formation of glucose from fructose – di- phosphate
Answer
Ans.(b)
42.Unidirectional flow of e- in non-cyclic photophosphorylation is
(A) PS II — e- —> PS I — e- —> NADP — e- —> water
(B) Water — e- —> PSII — e- —> PS I — e- —> NADP
(C) PS I — e- —> NADP — e- —> water — e- —> PS II
(D) Water — e- —> PS I — e- —> PS II — e- —> NADP
Answer
Ans.(B)
43.Which is sensitive to longer wavelength of light?
(A) Photolysis
(B) PSI
(C) PS II
(D) Photophosphorylation
Answer
Ans.(B)
44.Phytol tail is present at
(A) 3rd carbon of IInd ring
(B) 2nd carbon of IIIrd ring
(C) 7th carbon of IVth ring
(D) 3rd carbon of IVth ring
Answer
Ans.(C)
45.Reduction of co-enzyme NADP depends on
(A) Reduction of CO2
(B) Evolution of O2
(C) Photolysis of water
(D) Formation of ATP
Answer
Ans.(C)
46. Loculus is the internal space of
(A) Grana
(B) Stroma
(C) Thylakoid
(D) Quantasome
Answer
Ans.(C)
47. Calvins cycle involves
(A) Oxidative phosphorylation
(B) Oxidative carboxylation
(C) Reductive carboxylation
(D) Reductive phophorylation
Answer
Ans.(C)
48. In C4 plants, carboxylation is twice, it can be represented as
(A) Pyruvic acid + CO2 malic acid + CO2
(B) RUDP + CO2 and pyruvic acid + CO2
(C) PEPA + CO2 and RUDP + CO2
(D) PEPA + CO2 and malic acid + CO2
Answer
Ans.(C)
49. In non-cyclic photophosphorylation, all the participants acts as electron donor and acceptor except
(A) Chl-a of PS I
(B) Chl-a of PS II
(C) NADP
(D) Both (A) and (B)
Answer
Ans.(C)
50. Which of the following protist is a photoautotroph
(A) Thiobacillus
(B) Ferrobacillus
(C) Diatoms
(D) Chlorobium
Answer
Ans.(C)
