- ✓More than one codon has the same meaning
- B$1$ codon has many meaning
- C$1$ codon has one meaning
- DThere are $64$ codons
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Assertion $A$: Endometrium is necessary for implantation of blastocyst.
Reason $R$: In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium.
In the light of the above statements, choose the correct answer from the options given below:
$I.$ Recombinant $DNA$ technology popularly known as genetic engineering is a stream of biotechnology which deals with the manipulation of genetic material by man in vitro
$II. pBR322$ is the first artificial cloning vector developed in $1977$ by Boliver and Rodriquez from $E$. coli plasmid
$III.$ Restriction enzymes belong to a class of enzymes called nucleases
Which of the statements given above are correct?