Class XI & XII · Biology practice
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408 questions in this collection · Page 34 of 41
Photosynthesis In Higher Plants
Select the correct sequence of experiments that led to a gradual understanding of photosynthesis in green plants.
A Absorption spectra of chlorophyll a and b → production of glucose → release of oxygen → role of air B Role of air → release of oxygen → production of glucose → absorption spectra of chlorophyll a and b C Release of oxygen → production of glucose → absorption spectra of chlorophyll a and b → role of air D Production of glucose → role of air → release of oxygen → absorption spectra of chlorophyll a and b
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The understanding of photosynthesis progressed from proving the role of air, to oxygen evolution, carbohydrate formation and finally pigment absorption studies.
Photosynthesis In Higher Plants
How many turns of Calvin cycle are required for the formation of three molecules of glucose?
A 6 B 3 C 1 D 18
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Six turns of the Calvin cycle produce one glucose molecule. Therefore, three glucose molecules require 18 turns.
The Living World
Match List-I with List-II.
List-I
List-II
A. Family
I. Sapindales
B. Genus
II. Dicotyledonae
C. Class
III. Anacardiaceae
D. Phylum
IV. Angiospermae
E. Order
V. Mangifera
Choose the correct answer from the options given below:
A A-I, B-V, C-II, D-IV, E-III B A-II, B-I, C-III, D-IV, E-V C A-II, B-III, C-V, D-I, E-IV D A-III, B-V, C-II, D-IV, E-I
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Anacardiaceae is the family, Mangifera is the genus, Dicotyledonae is the class, Angiospermae is the phylum (division), and Sapindales is the order.
The Living World
Arrange the following taxonomic categories in ascending order.
A (g), (a), (e), (c), (b), (d), (f) B (a), (c), (d), (g), (f), (b), (e) C (g), (c), (d), (b), (e), (a), (f) D (f), (c), (b), (g), (d), (e), (a)
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The ascending taxonomic hierarchy is Species → Genus → Family → Order → Class → Phylum → Kingdom.
Morphology Of Flowering Plants
Match List-I with List-II.
List-I
List-II
A. Marginal placentation
I. Argemone
B. Axile placentation
II. Tomato
C. Parietal placentation
III. Primrose
D. Free central placentation
IV. Pea
Choose the correct answer from the options given below:
A A-II, B-IV, C-I, D-III B A-IV, B-II, C-III, D-I C A-IV, B-III, C-I, D-II D A-IV, B-II, C-I, D-III
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Pea shows marginal placentation, tomato axile, Argemone parietal and Primrose free central placentation.
Plant Kingdom
Sphenopsida class belongs to _______.
A bryophytes B angiosperms C gymnosperms D pteridophytes
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Sphenopsida (horsetails such as Equisetum) belongs to the pteridophytes.
Photosynthesis In Higher Plants
Which of the following statements regarding photorespiration are correct?2 is consumed and O2 is generated
A (a) and (d) only B (c) and (d) only C (b) and (d) only D (a) and (b) only
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Photorespiration occurs in C3 plants, forms phosphoglycolate and does not produce ATP or NADPH.
The Living World
Genus represents _______.
A an individual plant or animal B a population of plants and animals C a group of closely related species D a group of closely related families
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A genus consists of one or more closely related species sharing common characteristics.
Biological Classification
Which of the following is not a prokaryote?
A Bacteria B Blue green algae C Mycoplasma D Fungi
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Fungi are eukaryotic organisms, whereas bacteria, cyanobacteria (blue green algae) and Mycoplasma are prokaryotes.
Plant Growth And Development
Which of the following plant growth regulators promotes internode elongation prior to flowering in cabbage?
A Abscisic acid B Gibberellin C Indole butyric acid D Ethephon
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Gibberellins promote stem and internode elongation and induce bolting in rosette plants such as cabbage.
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