About DNA, true is:
Correct Answer: Melting point of DNA is closely related to cytosine guanine content of DNA
Description: DNA 2 strands are held together by hydrogen bonds. There are covalent bonds (3'-5' phosphodiester bonds) in sugar-phosphate backbone. Melting point of DNA is closely related to the cytosine-guanine content of DNA as C & G have 3 bonds, as compared to the 2 bonds present between A & T. Most common DNA is B- DNA. A single turn of B-DNA about the long axis of the molecule contains 10 bp. The distance spanned by one turn of B-DNA is 3.4 nm (34 Ao). The width (helical diameter) of the double helix in B-DNA is 2 nm (20Ao).
Category:
Biochemistry
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now