The two functional groups characteristic of sugars are
Options
(a) Carbonyl and hydroxyl (b) Carbonyl and phosphate (c) Carbonyl and methyl (d) Hydroxyl and methyl
Correct Answer:
Carbonyl and hydroxyl
Explanation:
Sugar is […]
The transparent lens in the human eye is held in its place by
Options
(a) smooth muscles attached to the ciliary body (b) smooth muscles attached to the iris (c) ligaments attached to […]
The stage during which separation of the paired homologous chromosomes begins is
Options
(a) Zygotene (b) Diakinesis (c) Diplotene (d) Pachytene
Correct Answer:
Diplotene
Explanation:
Synaptonemal complex disintegrates.Terminalisation begins at diplotene stage i.e […]
The similarity of bone structure in the forelimbs of many vertebrates is an example of
Options
(a) Adaptive radiation (b) Convergent evolution (c) Analogy (d) Homology
Correct Answer:
Homology
Explanation:
In different vertebrates, […]
The Golgi complex participates in
Options
(a) Activation of amino acid (b) Respiration in bacteria (c) Formation of secretory vesicles (d) Fatty acid breakdown
Correct Answer:
Formation of secretory vesicles
Explanation:
Golgi complex, […]
Sweet potato is a modified
Options
(a) Rhizome (b) Tap root (c) Adventitious root (d) Stem
Correct Answer:
Adventitious root
Explanation:
Sweet potato is a modified adventitious root for storage of food. Rhizomes […]
Stomatal movement is not affected by
Options
(a) CO₂ concentration (b) O₂ concentration (c) Light (d) Temperature
Correct Answer:
O₂ concentration
Explanation:
Light, temperature and concentration of CO₂ affect opening and closing […]
Stomata in grass leaf are
Options
(a) Barrel shaped (b) Rectangular (c) Kidney shaped (d) Dumb-bell shaped
Correct Answer:
Dumb-bell shaped
Explanation:
Grass being a monocot, has Dumb-bell shaped stomata in their leaves.
Pneumatophores occur in
Options
(a) Submerged hydrophytes (b) Carnivorous plants (c) Free-floating hydrophytes (d) Halophytes
Correct Answer:
Halophytes
Explanation:
Halophytes like mangrooves have pneumatophores.Apogeotropic (–vely geotropic) roots having lenticels called pneumathodes to uptake […]
Plants having little or no secondary growth are
Options
(a) Cycads (b) Conifers (c) Deciduous angiosperms (d) Grasses
Correct Answer:
Grasses
Explanation:
Grasses are monocots and monocots usually do not have secondary growth.Palm […]
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