Opening of floral buds into flowers, is a type of
Options
(a) autonomic movement of variation (b) paratonic movement of growth (c) autonomic movement of growth (d) autonomic movement of locomotion.
Correct Answer:
autonomic […]
Which one of the following pairs, is not correctly matched?
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(a) Gibberellic acid – Leaf fall (b) Cytokinin – Cell wall elongation (c) IAA – Cell wall elongation (d) Abscissic acid – Stomatal […]
The c₄ plants are photosynthetically more efficient than C₃ plants because:
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(a) the CO₂ compensation point is more (b) CO₂ generated during photorespiration is trapped and recycled through PEP carboxylase (c) the CO₂ […]
Two plants can be conclusively said to belong to the same species if they
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(a) have more than 90 per cent similar genes (b) look similar and possess identical secondary metabolites (c) […]
The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?
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(a) The food […]
During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric change?
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(a) First positive, then engative and […]
Which of the following is an example of negative feedback loop in humans?
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(a) Secretion of tears after falling of sand particles into the eye. (b) Salication of mouth at the sight […]
The okazaki fragments in DNA chain growth
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(a) polymerize in the 3′-to-5′ direction and forms replication fork (b) prove semi-conservative nature of DNA replication (c) polymerize in the ‘5-to-3′ direction and explain […]
The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?
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(a) super-coiling in nucleosomes (b) DN ase disgestion (c) through elimination of […]
During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle-like structure, what is it’s DNA-binding sequence?
Options
(a) AATT (b) CACC (c) TATA (d) TTAA
Correct Answer:
TATA
Explanation: […]
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