CBSE
Which of the following constitute about 10-20% of total circular RNA?
m-RNA
r -RNA
t-RNA
hn -RNA
Sequence of DNA (Non- coding) is known as:
exon
intron
cistron
none
Enzyme required for transcription is
RNAse
Endonuclease
RNA polymerase
DNA polymerase
The number of hydrogen bonds between adenine and thymine in a DNA molecule is :
two
three
four
eight
The process of multiplication of DNA from DNA is known as
replication
transversion
transcription
translation
Which is called soluble RNA ?
rRNA
tRNA
mRNA
hnRNA
Mutation is more common when it is present in:
dominant condition
recessive condition
constant in population
none of the above
A eukaryotic gene contains two kinds of base sequences. Which of these plays an important role in protein synthesis?
Introns
Exons
Both 'a' and 'b'
None of the above
In DNA, which is absent :
Adenine
Thymine
Guanine
Uracil
In DNA, which is absent ?
Adenine
Guanine
Uracil
Cytosine