KVPY Government Jobs Exams

The distance between two consecutive DNA base pairs is 0.34 nm. If the length of a chromosome is 1 mm,
the number of base pairs in the chromosome is approximately-
(A) 3 million (B) 30 million (C) 1.5 million (D) 6 million

Read Solution (Total 1)

Length of the dna=no. Of base pairs*distance between two base pairs.
So let the no. Of base pairs be x.so,x=length of dna/distance between two base pairs.
That is,x=1mm/0.34nm
=10 to the power -3 m/0.34*10 to the power -9 m
=2.94 *ten to the power six
=3 million
6 years agoHelpfull: Yes(0) No(0)

KVPY Other Question

The fluid part of blood flows in and out of capillaries in tissue to exchange nutrients and waste materials.
Under which of the following conditions will fluid flow out from the capillaries into the surrounding tissue ?
(A) When arterial blood pressure exceeds blood osmotic pressure
(B) When arterial blood pressure is less than blood osmotic pressure
(C) When arterial blood pressure is equal to blood osmotic pressure
(D) Arterial blood pressure and blood osmotic pressure have nothing to do with the outflow of fluid from
capilleries Estimate the order of the speed of propagation of an action potential or nerve impulse -
(A) nm/s (B) micron/s (C) cm/s (D) m/s