Which of the following statements is the most appropriate for sickle-cell anaemia?
It cannot be treated with iron supplements
It is a molecular disease
It confers resistance to acquiring malaria
All of the above
One of the following is true with respect to AUG
it codes for methionine only
it is also an initiation codon
it codes for methionine in both prokaryotes and eukaryotes
All of the above
The first genetic material could be
protein
carbohydrates
DNA
RNA
With regard to mature $m R N A$ in eukaryotes
exons and introns do not appear in the mature RNA
exons appear but introns do not appear in the mature RNA
introns appear but exons do not appear in the mature RNA
both exons and introns appear in the mature RNA
The human chromosome with the highest and least number of genes in them are respectively
chromosome 21 and Y
chromosome 1 and X
chromosome 1 and Y
chromosome $X$ and $Y$