MCQ
Genetically active area of chromosome is called
- ✓Euchromatin
- BHeterochroatin
- CHeptan
- DCistron
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$(a)$ Euchromatin is loosely packed chromatin
$(b)$ Heterochromatin is transcriptionally active
$(c)$ Histone octomer is wrapped by negatively charged DNA in nucleosome
$(d)$ Histones are rich in lysine and arginine
$(e)$ A typical nucleosome contains $400\,bp$ of DNA helix
Choose the correct answer from the options given below:
| Column $- I$ | Column $- II$ |
| $(A)$ Myometrium | $(1)$ Cushion of fatty tissue |
| $(B)$ Mons pubis | $(2)$ Tiny finger like structure |
| $(C)$ Acrosome | $(3)$ External layer of uterus |
| $(D)$ Prostate gland | $(4)$ Middle thick layer of uterus |
| $(5)$ Help in fertilization of ovum |
$II.$ The cell is treated with specific concentration of a divalent cation such as $... B...$ to increase pore size in cell wall
$III. $In $...C...$ method recombinant $DNA$ is directly injected into the nucleus of an animal cell
The most appropriate option regarding $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ is