2.6

Question 1

what is dna composed of?

Answer 1

1. phosphate
2. deoxyribose sugar ring
3. dna nucleotides

Question 2

— involves the pairing of specific bases via hydrogen bonds

Answer 2

complementary base pairing

Question 3

what is the structure of a nucleotide?

Answer 3

• a nitrogenous base connected to a sugar ring
• which forms a backbone via the connections to a phosphate group

Question 4

contrast rna and dna

Answer 4

rna …
- has a ribose pentose sugar ring
- has uracil
- is single stranded
dna …
- has a deoxyribose pentose sugar ring
- has thymine
- is double stranded and antiparallel
- forms a double helix

Question 5

what did franklin and wilkins discover?

Answer 5

they used x-ray diffraction to figure out the shape of dna, which was helical