Proteins

Question 1

Chemical bond in the primary structure of proteins is?

Answer 1

Covalent Bonds

Question 2

Prolamins are proteins soluble in what?

Answer 2

alcohol

Question 3

Number of amino acids serving as monomer units (building blocks) in food proteins is?

Answer 3

20

Question 4

Amino acids in proteins are in what form?

Answer 4

L-amino acids

Question 5

Which amino acids have the highest reactivity in Maillard reactions?

Answer 5

Arginine and Lysine

Question 6

At pH=pI, proteins are general solubility is what?

Answer 6

least soluble in aqueous solutions

Question 7

Chemical bond in secondary structure of proteins is what kind of bonding?

Answer 7

Hydrogen bonding

Question 8

Affinity of proteins to make foams can be increased by what?

Answer 8

by partial denaturation

Question 9

What two amino acids are involved in synthesis of lysinoalanine?

Answer 9

Cysteine/cysteine and lysine

Question 10

The collagen molecule is rich in what amino acids?

Answer 10

Glycine, proline, hydroxyproline

Question 11

Myosin and actin are?

Answer 11

Contractile proteins

Question 12

Myosin molecules are held together in thick filaments due to?

Answer 12

ionic interactions

Question 13

Water activity of raw meat is?

Answer 13

>0.95

Question 14

pH of meat is?

Answer 14

5-5.5

Question 15

Histidine is what type of molecule?

Answer 15

Polar, positively charged amino acid

Question 16

The first increase in toughness during cooking of meat (~40-40 degrees Celsius) happens due to ?

Answer 16

Partial denaturation of actomyosin

Question 17

When does collagen (gelatin) form gels?

Answer 17

Upon cooling of hot solutions

Question 18

Protein content in milk is?

Answer 18

3-5%

Question 19

What is the pH at which casein coagulates at room temperature?

Answer 19

4.6

Question 20

Proteins can foam or serve as emulsifiers due to what?

Answer 20

Amphiphilic nature

Question 21

Affinity of proteins to make foams can be increased by what?

Answer 21

Partial denaturation

Question 22

Casein micelles stay dispersed in milk due to what?

Answer 22

highly hydrophilic and charged kappa-casein

Question 23

Collagen (gelatin) forms gels by forming junctions zones caused by?

Answer 23

Hydrogen Bonds

Question 24

T or F. Gluten is soluble in water.

Answer 24

False

Question 25

The major reaction during dough formation is:

Answer 25

Sulfhydryl-disulfide interchange (intra and intermolecular) in gliadins and glutelins

Question 26

Globulins proteins are generally:

Answer 26

Soluble in diluted salt solutions

Question 27

Egg Protein that has antimicrobial activity is:

Answer 27

Lysozyme

Question 28

Define what carbohydrates are.

Answer 28

Polyhydroxy aldehydes, polyhydroxy ketons, and compounds derived from simple carbohydrates through reduction, oxidation, substitution, and condensation

Question 29

T or F. All carbohydrates are sweet and digestible.

Answer 29

False

Question 30

Egg protein that binds to biotin is?

Answer 30

Avidin

Question 31

Name the Amino Acid from it's structure, give it's polarity.

Answer 31

Arginine, polar and positively charged, basic amine side chain

Question 32

Name the Amino Acid from its structure, give its polarity.

Answer 32

Lysine, polar and positively charged, basic amine side chain

Question 33

Name the Amino Acid from its structure, give its polarity.

Answer 33

Histidine, polar and positively charged, basic amine side chain

Question 34

Name the Amino Acid from its structure, give its polarity.

Answer 34

Aspartic Acid, polar and negitively charged, acidic (carboxly side chain)

Question 35

Name the Amino Acid from its structure, give its polarity.

Answer 35

Glutamic Acid, polar and negitively charged, acidic (carboxly side chain)

Question 36

Name the Amino Acid from its structure, give its polarity.

Answer 36

Serine, Polar and uncharged, hydrophilic

Question 37

Name the Amino Acid from its structure, give its polarity.

Answer 37

Threonine, Polar and uncharged, hydrophilic

Question 38

Name the Amino Acid from its structure, give its polarity.

Answer 38

Asparagine, Polar and uncharged, hydrophilic

Question 39

Name the Amino Acid from its structure, give its polarity.

Answer 39

Glutamine, Polar and uncharged, hydrophilic

Question 40

Name the Amino Acid from its structure, give its polarity.

Answer 40

Cysteine, Polar and uncharged, hydrophilic

Question 41

Name the Amino Acid from its structure, give its polarity.

Answer 41

Selnocysteine, Polar and uncharged, hydrophilic

Question 42

Name the Amino Acid from its structure, give its polarity.

Answer 42

Glycine, Polar and uncharged, hydrophilic

Question 43

Name the Amino Acid from its structure, give its polarity.

Answer 43

Proline, Non-polar and hydrophobic with an amino group ring

Question 44

Name the Amino Acid from its structure, give its polarity.

Answer 44

Alanine

Question 45

Name the Amino Acid from its structure, give its polarity.

Answer 45

Isoleucine

Question 46

Name the Amino Acid from its structure, give its polarity.

Answer 46

Leucine

Question 47

Name the Amino Acid from its structure, give its polarity.

Answer 47

Methionine

Question 48

Name the Amino Acid from its structure, give its polarity.

Answer 48

Phenylalanine

Question 49

Name the Amino Acid from its structure, give its polarity.

Answer 49

Tryptophan

Question 50

Name the Amino Acid from its structure, give its polarity.

Answer 50

Valine

Question 51

Name the Amino Acid from its structure, give its polarity.

Answer 51

Tryosine, polar and uncharged, hydrophilic