MCQ
The earth like other planets formed from:
- AAggregates of uranium.
- ✓Cloud of gas and dust.
- CDivision of pre$-$existing planets.
- DCollisions of meteorites.
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Match List $I$ with List $II$
| List $I$ | List $II$ |
$A$. Two or more alternative forms of a gene | $I$. Backcross |
| $B$. Cross of $F_1$ progeny with homozygous recessive parents | $II$. ploidy |
| $C$. Cross of $F_1$ progeny with any of the parents | $III$. Allele |
| $D$. Number of chromosome sets in plant | $IV$. Test cross |
Choose the correct answer from the options given below:
$i.$ Six codons do not code for any amino acid.
$ii.$ Codon is read in $mRNA$ in a contiguous fashion.
$iii.$ Three codons function as stop codons.
$iv.$ The initiation codon $AUG$ codes for methionine.