NUCLEIC ACIDS QUIZ

conformational entropy

Van der Waals

electrostatic bond

hydrogen bonds

Adenine

Uracil

Thymine

Cytosine

ribose, phosphate

ribose, deoxyribose

ribose, uracil

deoxyribose, ribose

is replaced by uracil in RNA

can participate in hydrophobic interactions due to its methyl group

All of these

normally forms two hydrogen bonds with adenosine

270 and 280 nm

280 and 260 nm

260 and 280 nm

260 and 270 nm

absorption of visible light

absorption of uv light

none of these

molecular weight

adenine

cytosine

guanine

thymine

increases with increasing salt

decreases with increasing salt

is independent of G - C content

does not depend on hydrophobic interactions

a sugar and a phosphate

a sugar, a base and three phosphates

paired bases

a sugar, a base and a phosphate

10 kJ/mol

30 kJ/mol

25 kJ/mol

20 kJ/mol