Question.

State two structural differences between ribonucleic acid (RNA) and deoxyribonucleic acid (DNA)

Answer.

RNA                                                        DNA

a) Has ribose sugar                                 Deoxyribose sugar

b) Has uracil as one its bases                  Has thiamine of its bases

c) Single strand                                       Double strand

Question.

When a particular gene is said to be ‘sex-linked’, on which chromosome is that gene usually present?

Answer.

A sex-linked gene is usually carried on the X chromosome and is absent from the Y chromosome.