- ALysine
- BSerine
- ✓Cysteine
- DTyrosine

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$II.$ It varies from $15-100$ copies per cell. Choose regarding the above statements.
$I.$ Polymerase Chain Reaction $(PCR)$ is a technique of synthesizing multiple copies of the desired gene in vitro
$II.$ This technique was developed by Kary Mullis in $1985$
$III.$ A single $PCR$ amplification cycle involves three basic steps; denaturation, annealing and extension
Which of the statement given above are correct?
$(A)$ In Equisetum, the female gametophyte is retained on the parent sporophyte.
$(B)$ In Ginkgo, male gametophyte is not independent.
$(C)$ The sporophyte in Riccia is more developed than that in Polytrichum.
$(D)$ Sexual reproduction in Volvox is isogamous.
$(E)$ The spores of slime moulds lack cell walls.How many of the above statements are correct?