Proteins

Question 1

Major structural components of many natural foods, often determining their overall texture such as tenderness of
meat or fish products.

Answer 1

Proteins

Question 2

Also known as polypeptides

Answer 2

Proteins

Question 3

Proteins are organic compounds made up of —– —– arranged in a linear chain and folded into a globular form

Answer 3

Amino acids

Question 4

Amino acids in a polymer are joined
together by the ——- —– between the —— and —– —- residues.

Answer 4

Peptide bonds

Carboxyl

Amino acids

Question 5

How many types of amino acids occur
naturally in proteins?

Answer 5

20

Question 6

Proteins differ from each other to the type, number and sequence of amino acids that make up the

Answer 6

Polypeptide backbone

Question 7

Protein molecules range from the long, ——– —- that make up connective tissue and hair to the compact, ——- —— that can pass through cell membranes and set off metabolic reactions.

Answer 7

insoluble fibers

soluble globules

Question 8

Types of Proteins

Example of this type of protein are
– Collagen, keratin, fibrinogen, muscle protein

Answer 8

Fibrous protein

Question 9

can be obtained by boiling animal bones and connective tissue

Answer 9

Gelatin

Question 10

purified form of gelatin is obtained
from ———— of the certain fishes
including sturgeon, cod, catfish and carp

Answer 10

Air bladders

Question 11

What type of protein contain these examples — Albumin, globulin, casein, hemoglobin, all enzymes and hormones.

Answer 11

Globular Proteins

Question 12

one of a class of simple
proteins, composed of C,H,O,N and
small amount of S.

Answer 12

Albumin

Question 13

Globular proteins Forms insoluble compounds with many
metallic salts, such as —— of
mercury, —— of copper, and —– of
silver, and is, therefore, used as an
antidote to these poisons.

Answer 13

bichloride
sulfate
nitrate

Question 14

Building blocks of proteins

Answer 14

Amino acids

Question 15

Amino acids is composed of 3 groups

What are those?

Answer 15

Carboxylic Acid group
Amino group
And R group

Question 16

Amino acids is composed of 3 groups

What are those?

Answer 16

Carboxylic Acid group
Amino group
And R group

Question 17

are molecules containing an
amine group, a carboxylic acid group and a side chain that varies between different —— —–

Answer 17

Amino acids

Question 18

The key elements of an amino acid are

Answer 18

carbon, hydrogen, oxygen, and nitrogen.

Question 19

What type of proteins contain these examples tendons, cartilage, hair, nails?

Answer 19

Structural

Question 20

Muscles

Answer 20

Contractile

Question 21

Hemoglobin

Answer 21

Transport

Question 22

Milk

Answer 22

Storage

Question 23

insulin, growth hormone

Answer 23

Hormonal

Question 24

catalyzes reactions in cells

Answer 24

Enzymes

Question 25

Immune Response

Answer 25

Protection

Question 26

10 amino acids not synthesized by the body arg, his, ile, leu, lys, met, phe, thr, trp, val

Answer 26

Arginine Histidine Isoleucine Lysine Methionine Phenylalanine Threonine Tryptophan Valine

Question 27

How many amino acids cannot be synthesized by the body?

Answer 27

10

Question 28

R = H, CH3, alkyl groups, aromatic

Answer 28

Nonpolar

Question 29

R = –CH2OH, –CH2SH, –CH2C–NH2 , ( groups with –O-, -SH, -N-)

Answer 29

Polar

Question 30

R = –CH2COOH, or -COOH

Answer 30

Polar/Acidic

Question 31

R = –CH2CH2NH2

Answer 31

Polar/Acidic

Question 32

This type of amino acid Must be obtain from the diet • All in diary products • 1 or more missing in grains and vegetables

Answer 32

Essential Amino Acid

Question 33

What kind of bond is formed when the –COOH of an amino acid and the –NH2 of the next amino acid bonded?

Answer 33

Amide (peptide) bond

Question 34

Three-dimensional arrangement of amino acids with the polypeptide chain in a corkscrew shape • Held by H bonds between the H of –N-H group and the –O of C=O of the fourth amino acid along the chain • Looks like a coiled “telephone cord”

Answer 34

Secondary Structure – Alpha Helix

Question 35

Polypeptide chains are arranged side by side • Hydrogen bonds form between chains • R groups of extend above and below the sheet • Typical of fibrous proteins such as silk

Answer 35

Secondary Structure - Beta Pleaded Sheets