Properties of DNA?(class 9 Biology)
Answers
Answer:
ucture and Composition of DNA
DNA is a double-stranded helix. ...
Each strand has a 5′end (with a phosphate group) and a 3′end (with a hydroxyl group).
The strands are antiparallel, meaning that one strand runs in a 5′to 3′direction, while the other strand runs in a 3′ to 5′ direction.
Answer:
DNA helices can be right handed or left handed. But the B – conformation of DNA having the right handed helices is the most stable.
On heating the two strands of DNA separate from each other and on cooling these again hybridize.
The temperature at which the two strands separate completely is known as melting temperature (Tm). Melting temperature is specific for each specific sequence.
The B sample of DNA having higher melting point must have more C-G content because C-G pair has 3 hydrogen bonds