If a chromosome contains $2,00,000$ base pairs,how many nucleosomes will it have (in $,000$)?

Which of the following nitrogenous bases is $NOT$ present in $RNA$?

In $B-DNA$,the rise per base pair would be

How is the $DNA$ molecule useful to higher organisms?

Match the number of nucleotides of the genome in Column $I$ with the organisms in Column $II$. Choose the correct option given below.

Column $I$	Column $II$
$(A) 5386$ nucleotides	$(p) E. coli$
$(B) 48502$ bp	$(q) \text{Man}$
$(C) 4.6 \times 10^6$ bp	$(r) \text{Drosophila}$
$(D) 3.3 \times 10^9$ bp	$(s) \phi \times 174 \text{ bacteriophage}$
	$(t) \text{Bacteriophage lambda}$

How many base pairs are present in each turn of the $DNA$ helix?