The plant hormone that promotes cell division and is also used in tissue culture is:
A. Gibberellin
B. Cytokinin
C. Auxin
D. Abscisic acid
Answer: Option B
Solution (By JKSSB Mock Tests)
Cytokinins are plant hormones that promote cytokinesis (cell division) and shoot initiation. They are used in tissue culture along with auxins to induce organogenesis. Auxins promote cell elongation and root initiation, gibberellins stem elongation, abscisic acid stress responses and dormancy.
Explanation:
The medulla oblongata contains centers for heart rate, breathing, and blood pressure. Hypothalamus controls temperature and hunger, cerebrum intelligence and memory, cerebellum coordination.
Explanation:
Reverse transcriptase is an enzyme unique to retroviruses that transcribes single-stranded RNA into double-stranded DNA (cDNA). This DNA integrates into the host genome. DNA polymerase synthesizes DNA from DNA, RNA polymerase from DNA. Reverse transcriptase is used in RT-PCR and cDNA synthesis.
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