MCQ
At the end of $DNA$ replication $DNA$ molecule having
- ✓One strand of parental $DNA$ and second is newly formed.
- BBoth strands are newly synthesized.
- CTwo strands are of parental $DNA$.
- DBoth strands are different from parental $DNA$.
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$(1)$ Salt concentration in inland water - $30-35\%$
$(2)$ Salt concentration in the sea - $5\%$
$(3)$ Salt concentration in hypersalinelagoon - $>100\%$
$A.$ Barrier methods of contraception
$B.$ Cover the cervix during coitus
$C.$ Protect the user from contracting $STDs$
$D.$ They are reusable