Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biochemistry > Chapter 2 > Flashcards

Chapter 2 Flashcards

1
Q

Water has a high… [4]

A

Boiling point
Melting point
Heat of vaporization
Surface tension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Is water polar or nonpolar?

A

Polar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Does water act as a hydrogen bond donor or acceptor?

A

Both

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Is ice more or less dense than water?

A

Less Dense - ice floats in water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a cation?

A

Positively charged ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is an anion?

A

Negatively charged ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is an amphiphilic molecule?

A

A molecule with both hydrophobic and hydrophilic region(s)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What part of a molecule faces away from water?

A

Nonpolar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is osmosis?

A

Movement of water molecules from an area of high water potential to an area of low water potential

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is osmotic pressure?

A

The minimum amount of pressure needed to prevent osmosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What direction does water move?

A

Water moves in the direction of solute
Dilute -> Concentrated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is dialysis?

A

The separation of smaller molecules from larger ones via a semi-permeable membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the equilibrium constant (k) for water?

A

Keq = 1 x 10^-14

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the formula for pH?

A

pH = -log[H+]

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the pH of a solution with high [H+]?

A

Low pH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the pH of a solution with low [H+]?

A

High pH

17
Q

What is the formula for Ka?

A

Ka = [H+][A-] / [HA]

18
Q

What does Ka tell us?

A

The strength of the acid

19
Q

What is the formula for pKa?

A

pKa = -logKa

20
Q

What does a high pKa tell us?

A

There is a small amount of dissociation (weak acid)

21
Q

What does a low pKa tell us?

A

There is a large amount of dissociation (strong acid)

22
Q

What is the pKa of a strong acid?

A

Low pKa

23
Q

What is the pKa of a weak acid?

A

High pKa

24
Q

What is the function of a buffer?

A

Resist change in pH

25
Q

What range is a buffer reliable within?

A

One pH unit from their pKa

26
Q

What is the physiological pH?

A

7.4

27
Q

What range does log10 [A-]/[H-] need to be a good buffer?

A

-1 and 1

28
Q

What range does the ratio of [A-]/[H+] to be a good buffer?

A

1/10 to 10/1

29
Q

What does the midpoint of a titration curve show?

A

The point where pH and pKa are the same (pH = pKa)

30
Q

How much can physiological pH vary before it is considered an issue

A

+/- 0.05
Acidosis - blood pH is below 7.35
Alkalosis - blood pH is above 7.45

Biochemistry (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions