An average sized human chromosome consists of about……….nucleotides.
a) 140 thousand
b) 140 million
c) 140 billion
d) 140 trillion
What is the charge on DNA molecule?
a) positive
b) negative
c) both
d) neutral
The negative charge on DNA molecule of chromosome is due to………
a) nitrogenous bases
b) deoxyribose sugar
c) phosphate group
d) hydroxyl group
Why DNA a strong affinity histone proteins?
a) because of its double strands
b) because of it negative charge
c) because of its shape
d) all of these
What is the charge on histone protein molecules?
a) positive
b) negative
c) both
d) neutral
Explanation: unlike many other proteins (negatively charged) due to the abundance of some basic amino acids such as arginine and lysine
There are……types of histone proteins found in chromosome.
a) two
b) three
c) four
d) five
Explanation: H1, H2A, H2B, H3 and H4
