SI Week 1

Question 1

enzymatic protein
function?

Answer 1

Function:
- accelerate chemical rxn
- digestive enzymes catalyze hydrolysis of bonds in food

Question 2

defensive protein
function?

Answer 2

Function:
- protect against disease
- antibodies inactive and destroy viruses

Question 3

storage proteins
function?

Answer 3

Function:
- store amino acids
- ex: ovalbumin is egg white for protein

Question 4

transport protein
function?

Answer 4

Function:
transport substances
- membranes transport proteins
- hemoglobin transports O2

Question 5

hormonal protein
function?

Answer 5

Function:
- coordination of organism activity
- insulin causes other tissues to take up glucose to regulate (blood sugar)

Question 6

contractile/motor proteins
function?

Answer 6

Function:
- movement = cilia and flagella
- motor proteins = actin and myosin muscle cells

Question 7

structural proteins
function?

Answer 7

Function:
- support
ex: collagen/keratin and elastin

Question 8

receptor protein
function?

Answer 8

Function:
- response of cell to chemical stimuli
- receptors for signaling cells

Question 9

Levels of protein structure

Answer 9

Primary: string of amino acids from DNA
Secondary: Beta pleated sheets and Alpha helix
Tertiary: rxn b/w side chains, ex: ionic/disulfide bridge/van der wal
Quaternary: interaction b/w 2 or more polypeptide chains

Question 10

8 functions of proteins

Answer 10

1. enzymes
2. defensive
3. storage
4. transport
5. structural
6. contractile/motor
7. receptor
8. hormonal

Question 11

Lipid Functions (3)

Answer 11

extra= held together by ester linkages
1. fuel- store more energy than carbs but takes longer to break down
2. energy storage- adipocytes
3. structural- phospholipids and steroids(also act as chem signals)

Question 12

Saturated v Unsaturated Fatty acids

Answer 12

Saturated= saturated w/ hydrogens and solid
unsaturated= double bonds and liquid and cant pack together (liq)

Question 13

Categorize these Polysaccharides
Amylose
Amylopectin
Glycogen
Cellulose

Answer 13

Amylose
- Alpha 1-4
- unbranched
- store energy (starch)
Amylopectin
- Alpha 1-4 ; 1-6 branch
- somewhat branched
Glycogen
- Alpha 1-4 ; 1-6 branch
- branched
- muscle tissue
Cellulose
- Beta 1-4
- NO branching b/c straight (H+ bonds hold together in straight lines)