Which was the last human chromosome to be completely sequenced?
Chromosome 1
Chromosome 11
Chromosome 21
Chromosome-X
Which of the following are the functions of RNA?
It is carrier of genetic information from DNA to ribosomes synthesising polypeptides
It carries amino acids to ribosomes
It is a constituent component of ribosomes
All of the above
While analysing the DNA of an organism a total number of 5386 nucleotides were found out of which the proportion of different bases were Adenine $=29 \%$, Guanine $=17 \%$, Cytosine $=32 \%$, Thymine $=17 \%$. Considering the Chargaffs rule it can be concluded that
it is a double-stranded circular DNA
it is single-stranded DNA
it is a double-stranded linear DNA
No conclusion can be drawn
In some viruses, DNA is synthesised by using RNA as template. Such a DNA is called
A-DNA
B-DNA
cDNA
$r$ DNA
If Meselson and Stahl's experiment is continued for four generations in bacteria, the ratio of $15_{\mathrm{N}} / 15_{\mathrm{N}}: 15_{\mathrm{N}} / 14_{\mathrm{N}}: 14_{\mathrm{N}} / 14_{\mathrm{N}}$ containing DNA in the fourth generation would be
$1: 1: 0$
$1: 4: 0$
$0: 1: 3$
$0: 1: 7$