Ch 4

Question 1

pyrimidines

Answer 1

nucleobases with one ring

cytosine, thymine, uracil

Question 2

RNA

Answer 2

ribose sugar, which has 5 carbons and a hydroxyl group at the 2’, 3’, and 5’ carbons

Question 3

DNA

Answer 3

deoxyribose sugar and the 2’ OH is replaced by a 2’H

Question 4

what are nucleic acids made of

Answer 4

[nucleobase-sugar-phosphate] monomeric units with the backbone having alternating [sugar-phosphate] units

Question 5

nucleic acids are often

Answer 5

double stranded

Question 6

base pairings

Answer 6

• G:C
• A:T
• A:U