DNA and RNA

Question 1

pyrimidines are ???, ???, ???

Answer 1

cytosine
thymine
uracil

Question 2

Purines are ??? and ???
they have 2 rings

Answer 2

Guanine
Adenine

Question 3

what bond type binds a nucleotide to a sugar in the N1 of pyrimidines and the N9 of purines
Hint: it is a condensation reaction

Answer 3

glycosidic bonds

Question 4

Phosphates on DNA/RNA attach to sugars through what type of bond?
it attaches to the 5’ carbon of the sugar

Answer 4

an ester bond

Question 5

The OH group on C3’ of one sugar binds to the OH group on the phosphate to create a ??? bond. Phosphate also bonds to C5’ of the next sugar

Answer 5

phosphodiester bond

Question 6

DNA/RNA are directional: at the 5’ end there is no nucleotide bound above and the sugar 5’ carbon has a ??? phosphate

Answer 6

free phosphate

Question 7

DNA/RNA are directional: at the 3’ end there is no nucleotide bound below, the sugar 3’ carbon has a free ??? group

Answer 7

free OH group

Question 8

TRUE or FALSE: DNA in length is 3.6 nm

Answer 8

TRUE

Question 9

Base pairs are ??? nm apart

Answer 9

0.34nm

Question 10

how many base pairs in a 360 turn?

Answer 10

10.5 base pairs

Question 11

TRUE or FALSE: width of DNA helix is 2 nm

Answer 11

TRUE

Question 12

TRUE or FALSE DNA/RNA cannot be renatured

Answer 12

FALSE

Question 13

melting point is affected by the content of ??? and ??? because these two base pairs form 3 hydrogen bonds with each other

Answer 13

Guanine and Cytosine

Question 14

DNA is written only ??? base pairs long

Answer 14

6 base paris