Week 2

Question 1

if pH < pKA

Answer 1

we protonate, add an H+

Question 2

proline has a

Answer 2

imino bond

Question 3

non spont require

Answer 3

input of energy

Question 4

spontaneous

Answer 4

increase in disorder, increase in S. doesnt require input of energy

Question 5

going from 2 reactants to 3 products

Answer 5

increasing disorder. delta S is positive, so delta G is negative.

Question 6

__ and ___ fundamental to life

Answer 6

genetic information and free energy

Question 7

cell requires

Answer 7

free energy, imported from surroundings

Question 8

polar covalent bond

Answer 8

unequal sharing of electrons.

Question 9

dideoxynucleotide

Answer 9

cant form another nucleotide

Question 10

out of a reaction comes out

Answer 10

condensation reaction (water) and ppi (pyrophosphate

Question 11

most structurally complex molecules?

Answer 11

proteins

Question 12

protein has

Answer 12

three dimensional structure

Question 13

two types of beta sheet structures in proteins

Answer 13

antiparallel and parallel b sheets.

Question 14

amino acids are joined by

Answer 14

peptide bonds. bw carboxyl group of one amino acid and the amino group of another amino acid.

Question 15

non covalent bond

Answer 15

NO SHARING OF ELECTRONS

Question 16

form leads to

Answer 16

function

Question 17

pH of human body

Answer 17

7.2-7.4

Question 18

pKA means

Answer 18

equilibrium bw reactants and products

Question 19

OH groups

Answer 19

can be phosphorylated

Question 20

o linked

Answer 20

OH group (Ser, Thr) site for attachment of carbohydrates

Question 21

non polar molecules found where?

Answer 21

phospholipid bilayer. they are integral proteins-proteins in membrane.

Question 22

Met (M) is (almost always)

Answer 22

first amino acid translated (AUG codon = Met)

Question 23

Cys can form

Answer 23

covalent disulfide bond by oxidation ( -C-S-S-C- ). only covalent linkage that creates tertiary structure.