MCQ
In $DNA$ molecule, which of the following base pair is present
- ACytosine and adenine
- ✓Adenine and thymine
- CAdenine and guanine
- DCytosine and thymine
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$I.$ Meiosis involves pairing of homologous chromosomes and recombinatio between them
$II.$ Two diploid cells are formed at the end of meiosis-$II$
$III.$ Meiosis involves two sequential cycles of nuclear and cell division calle meiosis-$I$ and meiosis-$II$, but only a single cycle of $DNA$ replication
$IV$. Meiosis-$I$ is initiated after the parental chromosome replication which produce identical sister chromatids at the S-phase
The correct option is
$R$ : These are sacred grooves where biota is protected on-site
$\begin{array}{|l|l|} \hline Column\;-\;I & Column\;-\;II \\ \hline (1)\;Cellulose & (p)\;Acidic \\ \hline (2)\;Tyrosine & (q)\;CH_2\;-OH\;containing \\ \hline (3)\;Serine & (r)\;Aromatic \\ \hline & (s)\;Homopolymer \\ \hline \end{array}$