Macromolecules

Question 1

What percentage of the molecular weight of proteins is nitrogen

Answer 1

16

Question 2

How many different amino acids are there

Answer 2

20

Question 3

What are some simple proteins

Answer 3

albumin, histones, globulin, collagen, glutelin

Question 4

What are conjugated proteins

Answer 4

protein and prosthetic group/ cofactor

Question 5

What are derived proteins

Answer 5

proteins derived by partial to complete hydrolysis of simple or conjugated proteins

Question 6

What are primary derived proteins

Answer 6

they are denatured proteins and some or all crosslinks holding molecular structure are broken

Question 7

what are secondary derived proteins

Answer 7

formed by hydrolysis of simple or conjugated proteins

Question 8

What is primary structure of proteins

Answer 8

shows sequence and number of amino acids in a polypeptide chain

Question 9

What is secondary structure of proteins

Answer 9

folding of amino acids into alpha helix or beta pleated sheets by hydrogen bonding

Question 10

What is tertiary structure

Answer 10

polypeptide undergoes unfolding and refolding on itself and makes 3D structure. makes proteins rounded and somewhat rigid

Question 11

What is quaternary structure

Answer 11

shows individuals protein subunits each with its own tertiary structure

Question 12

What influences solubility of proteins

Answer 12

pH

Question 13

where do proteins rotate plane polarized light

Answer 13

to the left (levorotatory)

Question 14

What is protein coagulation

Answer 14

due to heating or using reagents proteins lose their structue

Question 15

What percentage of dry weight do proteins form

Answer 15

50%

Question 16

What stores iron in blood

Answer 16

ferritin

Question 17

What acts as copper carrier in blood plasma

Answer 17

ceruloplasmin

Question 18

How is copper used in body

Answer 18

to build strong bones and making melanin

Question 19

What are pheromones

Answer 19

substances secreted to outside by an individual and received by other individual of same species

Question 20

What is nitrogen content of enzymes

Answer 20

16%

Question 21

Which enzyme remains active in stomach

Answer 21

lingual lipase

Question 22

What percentage of fat does lingual lipase digest

Answer 22

30%

Question 23

Which enzyme digests all fats in food

Answer 23

steapsin

Question 24

What is carboxypeptidase

Answer 24

hydrolyses first peptide or amide bond at carboxyl end of protein

Question 25

What does carboxypeptidase have a preference for

Answer 25

aromatic or branched hydrocarbons

Question 26

Where is carboxypeptidase made

Answer 26

in pancreas

Question 27

What is elastase

Answer 27

helps break down fats, proteins and carbohydrates

Question 28

where is elastase made

Answer 28

pancreas

Question 29

What is collagenase

Answer 29

breaks peptide bond in collagen

Question 30

What is optimum temperature of urease

Answer 30

60

Question 31

What is optimum pH of pepsin

Answer 31

2

Question 32

What is optimum pH of trypsin

Answer 32

5-9

Question 33

What is uncompetitive inhibition

Answer 33

inhibitor binds to enzyme-substrate complex