MCQ
The animal's body belonging to phylum-Mollusca is divided into
- AHead, thorax and abdomen
- BHead, muscular foot $\&$ abdomen
- CHead, thorax and visceral hump
- ✓Head, muscular foot and visceral hump
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| A. The template with polarity 3'$\rightarrow$5' | Continous replication |
| B. The template with polarity 5'$\rightarrow$3' | Discontinous replication |
| C. DNA replication | Energy expensive process |
| D. Okazaki fragment | Discontinous synthesis |

| Column$-I$ | Column$-II$ |
| $(a)$ Placenta | $(i)$ Androgens |
| $(b)$ Zona pellucida | $(ii)$ Human Chorionic Gonadotropin $(hCG)$ |
| $(c)$ Bulbo$-$urethral glands | $(iii)$ Layer of the ovum |
| $(d)$ Leydig cells | $(iv)$ Lubrication of the Penis |
$(a)\quad(b)\quad(c)\quad(d)$
Reason: Histamine is a vasodilator.
Label $A, B$ and $C$
$A$. Muscle bundles are held together by collagenous connective tissue layer called fascicle.
$B$. Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions.
$C$. Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins.
$D$. $M$ line is considered as functional unit of contraction called sarcomere.
Choose the most appropriate answer from the options given below: