September 9th hw quiz

Question 1

Biological membranes are bilayers consisting mostly of

Answer 1

hydrophobic molecules like phospholipids

Question 2

A DNA molecule w/ 32% thymine would have how much cytosine?

Answer 2

18%

Question 3

Complementary nucleotides in the DNA molecule are held together by

Answer 3

hydrogen bonds

Question 4

anti-parallel in DNA is

Answer 4

2 individual strands on nucleotides run in opposite directions

Question 5

the purines are

Answer 5

adenine and guanine

Question 6

the pyrimidines are

Answer 6

cytosine and thymine

Question 7

thymine and adenine when bonded…

Answer 7

form 2 hydrogen bonds across the DNA double helix

Question 8

phospholipids have

Answer 8

2 fatty acid tails and a phosphate head group, hydrophilic heads and hydrophobic tails

Question 9

proteins are made up of

Answer 9

linked amino acids

Question 10

nucleotides link to form

Answer 10

nucleic acids

Question 11

guanine and cytosine form how many bonds across the double helix

Answer 11

three!

Question 12

parts of a nucleotide:

Answer 12

1. nitrogenous base
2. phosphate group
3. sugar molecule (ribose if RNA, deoxyribose if DNA)

Question 13

what would the complementary sequence be for TAGGATC

Answer 13

ATCCTAG

Question 14

the largest human chromosome contains about

Answer 14

250 million (250 x 10^6) base pairs in each strand