11th class (FSc) Biology unit 11 MCQs
26. One of the a accessory photosynthetic pigments carotenes are mostly:
a. Green to yellow
b. Red to orange
c. Orange to red
d. Yellow to orange
27. Haem portion of hemoglobin contains an atom of:
a. Phosphorus
b. Magnesium
c. Calcium
d. Iron
28. The carotene are mostly red to:
a. Orange
b. Blue
c. Green
d. Yellow
29. Accessory photosynthetic pigments xanthophylls are:
a. Yellow in color
b. Green in color
c. Calcium
d. Red in color
30. Molecular formula for chlorophyll “b” is:
a. C55 H70 O5 N4 Mg
b. C55 H72 O5 N4 Mg
c. C56 H70 O6 N6 Mg
d. C55 H70 O6 N4 Mg
31. Chlorophyll molecule contains except:
a. Magnesium
b. Pophyrin ring
c. Iron
d. Phytol tail
32. Photosynthetic pigments are the substances that absorb visible light having wavelength:
a. 380-750 nm
b. 150-340nm
c. 350-780 nm
d. 230-450 nm
33. Chlorophyll are insoluble in:
a. Water
b. Alcohol
c. Carbon tetrachloride
d. Acetone
34. Chlorophyll “a” is:
a. Blue green
b. Yellow green
c. Green black
d. Orange green
35. Haem portion of hemoglobin is same to pophyrin ring with a difference of:
a. Iron atom
b. Carbon atom
c. Oxygen atom
d. Hydrogen atom
36. One of the following is not an accessory pigment:
a. Xanthophyll
b. Chlorophyll “a”
c. Chlorophyll “b”
d. Carotenes
37. A graph plotting absorption of light of different wavelengths by a pigment is called:
a. Visible spectrum
b. Action spectrum
c. Frequency histogram
d. Absorption spectrum
38. The hypothesis that plans split water as a source of hydrogen was given by:
a. Calvin
b. Van Niel
c. Pasteur
d. Kreb
39. Long hydrocarbon tail of chlorophyll attached to pyrrol ring is called:
a. Haem
b. Phytol
c. Antenna complex
d. Electron acceptor
40. Englemann used in his experiment in 1883:
a. Spirogyra
b. Aerobic bacteria
c. Anaerobic bacteria
d. Both a and b
41. The first action spectrum was obtained by:
a. Melvin Calvin
b. T.W. Englemann
c. Ernst Haeckel
d. Van Neil
42. Absorption of blue light in maximum at:
a. 670 nm
b. 430 nm
c. 750 nm
d. 380 nm
43. The maximum absorption peaks of length are:
a. 430,670
b. 450,640
c. 550,650
d. 440,490
44. The first action spectrum was obtained by biologist T.W Engelmann in:
a. 1898
b. 1883
c. 1876
d. 1938
45. The light falling on leaf surface is absorbed about:
a. 50%
b. 1%
c. 100%
d. 25%
46. The percentage of photosynthetic carried out by terrestrial plants is about:
a. 30
b. 10
c. 40
d. 20
47. The percentage of CO2 in air is:
a. 0.4-0.6%
b. 0.02-0.3%
c. 0.05-0.09%
d. 0.03-0.04%
48. Carbon dioxide enters the leaves through:
a. Air spaces
b. Epidermis
c. Stomata
d. Cuticle
49. The area of leaf surface covered by stomata is only:
a. 1-2%
b. 2-4%
c. 1-3%
d. 2-3%
50. Daily rhythmic opening and closing of stomata is:
a. Internal clack
b. External clack
c. Both a & b
d. None of them