Regulatory proteins are the accessory proteins that interact with RNA polymerase and affect its role in transcription. Which of the following statements is correct about regulatory protein?
They only increase expression
They only decrease expression
They interact with RNA polymerase but do not affect the expression
They can act both as activators and as repressors
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