In sea urchin DNA, which is double-stranded 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are:

The 3'-5' phosphodiester linkages inside a polynucleotide chain serve to join:

Which one of the following pairs of nitrogenous bases of nucleic acids is wrongly matched with the category mentioned against it?

1. Thymine, Uracil - Pyrimidines
2. Uracil, Cytosine - Pyrimidines
3. Guanine, Adenine - Purines
4. Adenine, Thymine - Purines

During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the mRNA would be:

1. TCTGG

2. UAUGC

3. UATGC

4. TATGC

The similarity between DNA and RNA is that both:

1. are polymers of nucleotides

2. have a similar pyrimidine

3. have similar sugars

4. genetic material in all organism

Number of base pairs in human chromosomes are:

1. $3<mspace\; width="1em"></mspace>\times <mspace\; width="1em"></mspace>{10}^9$

2. $3<mspace\; width="1em"></mspace>\times <mspace\; width="1em"></mspace>{10}^7$

3. $6<mspace\; width="1em"></mspace>\times <mspace\; width="1em"></mspace>{10}^8$

4. $6<mspace\; width="1em"></mspace>\times <mspace\; width="1em"></mspace>{10}^7$

Gene is composed of:
1.  Amino acids
2.  Polynucleotide
3.  Fatty acid
4.  Nitrogen bases

The molecular weight of DNA in yeast is:

1. $2.$ $56$ $\times$ ${10}^9$

2.  $0.5$ $$ $\times$ ${10}^9$

3. $7$ $\times$ ${10}^7$

4. $6$ $\times$ ${10}^6$