MCQ
First mammals appeared around
- A$459\; million$ years back
- ✓$220\; million$ years back
- C$1600 \;million$ years back
- D$3800\; million$ years back
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$I.$ Extraction of the desired gene product
$II.$ Amplification of the gene of interest
$III.$ Isolation of a desired $DNA$ fragment
$IV.$ Ligation of the $DNA$ fragment into a vector
$V.$ Insertion of recombinant $DNA$ into the host
Correct order is
Reason : Histones are of five major types $H_1,\,H_2A\,, H_2B,H_3$ and $H_4$ .