MCQ
What is the full form of $\text{ACTH}?$
- AAdenocorticotrophic hormone.
- ✓Adrenocorticotrophic hormone.
- CAdenocorticoid hormone.
- DAdrenocorticoid hormone.
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$I.$ Receptor sites on sarcolemma
$II.$ Nerve impulse
$III.$ Release of $\mathrm{Ca} \hat{\imath}$
$IV.$ Acetylcholine release
$V.$ Shortening of sarcomere
$VI.$ Synaptic cleft
$VII.$ Spread of impulse over sarcolemma on T-tubule
The correct option is
$a -$ cell cycle can vary from organisation to organism and also from cell type to cell type.
$b -$ $DNA$ synthesis occurs only in pachytene.
$c-G_1$ phase corresponds to the interval between mitosis and initiation of $DNA $ reproduction.