Which of the following statements are true?
I. Genetic RNA occurs in certain viruses called ribovirus
II. RNA of riboviruses may be single stranded
III. Double stranded RNA may also be present in riboviruses
All are correct
Only I
All are incorrect
Only II
Related Questions
In a DNA, ‘A’ base pairs with …..by…... H bonds. Chooses the correct option for the blanks A and B
T, three
C, four
T, two
G, two
One turn of DNA has nucleotide pairs
8
100
6
10
What type of bond links nucleotides together in a nucleic acid strand?
Peptide bond
Glycosidic bond
Hydrogen bond
Phosphodiester bond
Which type of RNA carries the genetic code from DNA to ribosomes?
tRNA
rRNA
mRNA
snRNA
If the total amount of adenine and thymine in a double-stranded DNA is 60%, then the amount of guanine in this DNA will be
15%
20%
30%
40%
One strand of DNA has sequence of nucleotide 3’ ATTCGCTAT 5’ then other strand of DNA has
3’ TAAGCGATA 5’
5’ TAGCACGTA 5’
5’ TAGCACGTA 3’
5’ TAAGCGATA 3’
A novel virus is discovered with a single-stranded nucleic acid genome. Treatment with RNase H significantly reduces its infectivity, while DNase I has no effect. Further analysis reveals the presence of short RNA fragments complementary to the genome. What can be most confidently inferred about the viral genome?
It is a single-stranded RNA virus that replicates through a DNA intermediate.
It is a single-stranded DNA virus that replicates through an RNA intermediate.
It is a single-stranded RNA virus that replicates through a double-stranded RNA intermediate.
It is a double-stranded RNA virus.
The double-helix structure of DNA is stabilized by:
Covalent bonds
Ionic bonds
Hydrogen bonds
Van der Waals forces
If the DNA of a zygote has adenine, thymine in the gametic DNA is
x
x/2
2x
x/4
The DNA in which the base sequence of one strand is opposite to that of other strand when read from opposite direction is called
Satellite DNA
Palindromic DNA
Repetitious DNA
Non-coding DNA
