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Flashcards in Lecture 3 Deck (20):
1

Titration Curve

Acetic Acid (weak) CH3COOH (99%) --> CH3COO- + H+
CH3COO- = acetate = conjugate base
When adding OH-, it combines with H+ to form water, additionally COOH is falling apart into COO- and H+. This is the reason why it’s slowly rising. AKA law of max action.
Whenever u have a chemical reaction, u add reactants on one side or removal of products, then u shift the reaction to the right side.
When u add a lot of reactants on the right side, u will shift the reaction to the left side.

2

half-equivalent point

50% of acetic acid dissociated.

3

Equivalence point

all acid converted to conjugate base (100 % dissociation). From then onwards, ph rises rapidly. (no more protons around)

4

What acts as a buffer?

Acetic acids, because it buffers all these OH ions. But it only works in one direction.
Can't have strong acid or base

5

Buffers

Buffer make the overall solution resistant to pH change, coz they react with both added bases and acids.

6

Why is buffer important?

- important for chemical reaction to take place
- important for stability of proteins

7

Law of mass action

- Buffer
- addition of reactants accelerates the reaction; removal of products acceleration the reaction (towards the right side)

8

Octane

- found in gasoline, derived from plants, nonpolar covalent bond

9

6 functional groups commonly attached to C:

- hydroxyl
- phosphate
- sulfhydryl
- amino
- carbonyl
- carboxyl

10

Macromolecules

- proteins, nucleic acids, carbohydrates
exception: lipids (smaller in size)
- made the same way in all living organisms, same proportions (coz same ancestor)

11

Polymerization

- bonding tgt of monomers

12

Two types of polymerization

- condensation
- hydrolysis

13

Condensation

- monomer in, water out
- building the polymer
Ex. Making proteins, DNA, RNA, long sugar polymers, require energy input, call it polarization or condensation
Anabolic (require energy input)

14

Hydrolysis

- water in, monomer out
- Breaking down polymer
All these reactions are releasing energy
Ex. Eating food, break down proteins, carbs, further processed by metabolism
Catabolic

15

Collagen (protein)

find in tendons that connects bonds to mussels, rope like

16

Alcohol Dehydrogenase

drinking

17

Deoxy ribonuclease

cuts DNA

18

Proteins

- polymers of amino acids
- folding is crucial to the function of a protein (influenced largely by sequence of amino acids (primary structure))

19

Side Chain - amino acid

- identifies structure, variability lies

20

Amin acids

- amino group is start
- carboxyl is the end