molecular bio 1

Question 1

A DNA

Answer 1

Right handed, RNA

Question 2

B DNA

Answer 2

Right handed, DNA, human

Question 3

Z DNA

Answer 3

Left handed

Question 4

No. of bases/ turn

Answer 4

10.5

Question 5

DNA is not found in ________ cells

Answer 5

red blood cells

Question 6

3 components of nucleotides

Answer 6

Phosphate, sugar, nitrogenous base

Question 7

Purines

Answer 7

Adenosine, guanine

Question 8

Pyrimidines

Answer 8

Cytosine, thymine

Question 9

RNA vs. DNA structure

Answer 9

2’ oxygen

Question 10

__________ bonds join nucleotides

Answer 10

Phosphodiester

Question 11

Add to the _____’ side of DNA

Answer 11

3

Question 12

2 ways of base interaction

Answer 12

Hydrophobic stacking, base pairing

Question 13

2 hydrogen bonds, 3 hydrogen bonds

Answer 13

A-T, C-G

Question 14

DNA strands go opposite directions

Answer 14

Antiparallel

Question 15

Hybridization

Answer 15

2 single strands of DNA of different origins base pairing

Question 16

Southern blotting

Answer 16

DNA separation by size on gel, then hybridized to see what it is

Question 17

Bases that get methylated

Answer 17

Adenosine, cytosine

Question 18

Methylation ___________s expression in eukaryotes

Answer 18

Decreases

Question 19

___________ can ________ into uracil

Answer 19

Cytosine, deaminate

Question 20

The _____ isomer of the peptide bond is most common

Answer 20

Trans

Question 21

_________ makes disulfide linkages, which influence the _______ structure of a protein

Answer 21

Cysteines, primary

Question 22

Amino acid parts

Answer 22

Amine group, carboxyl group, central carbon, side chain

Question 23

_______ bonds bind amino acids

Answer 23

Peptide bonds

Question 24

Peptide bonds __________ rotation

Answer 24

do not have

Question 25

Domain

Answer 25

Independently folding portion of protein

Question 26

Disulfide bonds ______________

Answer 26

Stabilize final fold but do not contribute to how it folded

Question 27

X-chromosome inactivation

Answer 27

One X getting inactivated to have proper dosage

Question 28

Genomic imprinting

Answer 28

Only one copy from one parent is made active

Question 29

Heterochromatin and its opposite

Answer 29

Silent, euchromatin active

Question 30

Amino acids at low pH

Answer 30

Have H's, NH3+ and COO

Question 31

Amino acids at high pH

Answer 31

Lose H's; NH2 and COO-

Question 32

Amino acids at medium pH

Answer 32

NH3+ and COO-