Proteins

Question 1

Is an unbranched chain of amino acids, each joined to the next by a peptide bond

Answer 1

Peptide

Question 2

True or False.

Inorganic proteins consists of Phosphoproteins, Metalloproteins, and Hemoproteins

Answer 2

False, Hemoproteins is included in Organic

Question 3

Consists all the essential amino acids in approximately the same relative amounts in which the human body needs them

Answer 3

Complete dietary protein

Question 4

A molecule that has a positive charge on one atom and a negative charge on another atom, but has no net charge

Answer 4

Zwitterion

Question 5

True or False.
Zwitterion proteins does not change its own pH but rather changes the charges of ions between an amino group and carboxyl group

Answer 5

False, they change in pH but does not change in charge

Question 6

It is an amino acid in which the amino group and the carboxyl group are attached to the alpha-carbon atom

Answer 6

Alpha-amino acid

Question 7

It is an organic compound that contains both an amino group and carboxyl group

Answer 7

Amino Acid

Question 8

True or False.

The side chain (R group) distinguishes alpha-amino acids from each other by chemical means only

Answer 8

False, both physically and chemically

Question 9

True or False.

According to the rule for drawing the Fischer projection of amino acids, the carboxyl group as in a horizontal position

Answer 9

False, is at the top of the projection

Question 10

True or False.
According to the rule of drawing for Fischer Projection, the amino group is the only one who can denote whether an amino acid is levorotatory or dextrorotatory

Answer 10

True

Question 11

It is the only standard amino acid that has a side chain that contains a thiol (-SH) group

Answer 11

Cysteine

Question 12

If a cysteine is oxidized, it dimerizes to another cysteine to form what?

Answer 12

Cystine molecule

Question 13

It is necessary in most metabolic processes of the human body that the body itself cannot synthesize

Answer 13

Essential amino acid

Question 14

The strongest of the tertiary-structure interactions A result from the thiol groups of two cysteine residues reacting with each other.

Answer 14

Disulfide Bond

Question 15

True or False

Disulfide Bond is an Ionic Bond

Answer 15

False, Covalent Bond

Question 16

It occurs between amino acids with polar R groups

Answer 16

Hydrogen Bond

Question 17

It results when two nonpolar side chains are close to each other

Answer 17

Hydrophobic interactions

Question 18

It always involve the interaction between an acidic side chain and a basic side chain

Answer 18

Electrostatic Interactions (salt bridges)

Question 19

It is the organization among the the various peptide chains in a multimeric protein.

Answer 19

Quaternary protein structure

Question 20

Morse Type
A quaternary protein structure consists of:
I. Electrostatic Attractions
II. Hydrogen Bonds
III. Disulfide Bond
IV. Hydrophobic Bond

A. II, III, IV
B. I, II, III, IV
C. I, II, IV
D. I, II, III

Answer 20

C. I, II, IV

Question 21

It is a single protein chain that adopts a shape which resembles a coiled spring (helix), with the coil configuration maintained by hydrogen bonds

Answer 21

Alpha helix structure

Question 22

Morse Type
A secondary protein has two types depending on the on the manner of hydrogen bonding:
I. Gamma Pleated Helix
II. Omega Coiled Spring
III. Alpha Helix
IV.  Beta Pleated Sheet

A. I, II, IV
B. II, III
C. I, II, III
D. III, IV

Answer 22

D. III, IV

Question 23

True or False.

The amino acid sequence of myoglobin is identical to all the myoglobin of the body

Answer 23

True

Question 24

True or False.

Pigs, Cows, Horses, and Human have similarities in the sequence of insulin amino acid

Answer 24

True

Question 25

Are molecules that have an elongated shape with one dimension much longer than the others

Answer 25

Fibrous protein

Question 26

Are molecules that have peptide chains that are folded into spherical or globular shapes

Answer 26

Globular protein

Question 27

A kind of protein based on shape which is associated with a membrane system of a cell

Answer 27

Membrane Protein

Question 28

True or False. | The sequence of amino acids present in a protein's peptide chain or chains is a secondary structure

Answer 28

False, Primary Structure

Question 29

The overall three-dimensional shape that results form the attractive forces between amino acid side chains (R groups) that are not near each other in the protein chain

Answer 29

Tertiary Structure

Question 30

True or False. | A protein with only the amino acid residues are present is called Complex (conjugated) protein

Answer 30

False, Simple Protein

Question 31

True or False. | A protein is made up of at least 35 alpha-amino acid residues

Answer 31

False, 40 alpha-amino acid residues

Question 32

Is a naturally occurring, unbranched polymer in which the monomer units are amino acids

Answer 32

Protein

Question 33

True or False. Difference in molecules contain the same amino acids but in different order are called Enantiomeric Peptides. Ex. Ala-Gly and Gly-Ala

Answer 33

False, Isomeric Peptides

Question 34

It is an amide bond between amino acids. It is also a covalent bond between the carboxyl group of one amino acids and the amino group of another amino acid

Answer 34

Peptide Bond

Question 35

It is a portion of an amino acid structure that remains, after the release of H20, when an amino acid participates in peptide bond formation as it becomes part of a peptide chain

Answer 35

Amino acid residue

Question 36

A peptide with 3 amino acid chains

Answer 36

Tripeptide

Question 37

A peptide with 2 amino acid chains

Answer 37

Dipeptide

Question 38

A peptide with 10 to 20 amino acid chains

Answer 38

Oligopeptide

Question 39

A peptide with more than 20 amino acid chains

Answer 39

Polypeptide

Question 40

It contains two amino groups and one carboxyl group, the second amino group being part of the side chain

Answer 40

Polar Basic Amino Acid

Question 41

It contains one amino group and two carboxyl groups, the second carboxyl group being part of the side chain

Answer 41

Polar Acidic Amino Acid

Question 42

It contains one amino group, one carboxyl group, and a side chain that is polar but neutral

Answer 42

Polar Neutral Amino Acid

Question 43

It contains one amino group, one carboxyl group, and a nonpolar side chain.

Answer 43

Nonpolar amino acid

Question 44

True or False. A tertiary consists of four (4) types of peptide unit interactions namely covalent disulfide bonds, hydrogen bonds, hydrophobic attractions, and electrostatic attractions (salt bridges)

Answer 44

True

Question 45

It is a two fully extended protein chain segments in the same or different molecules that are held together by hydrogen bonds

Answer 45

Beta pleated sheet structure

Question 46

A protein with only amino acid residues are present

Answer 46

Simple protein

Question 47

A protein that has non-amino acid entity (prosthetic group) present in its structure

Answer 47

Complex (conjugated) protein

Question 48

Lipoproteins, Glycoproteins, Hemoproteins, and Nucleoproteins are?

Answer 48

Organic

Question 49

Metalloproteins and Phosphoproteins are?

Answer 49

Inorganic

Question 50

A protein that has more than one peptide chain

Answer 50

Multimeric protein

Question 51

A protein that has only one peptide chain

Answer 51

Monomeric protein

Question 52

True or False. | In primary protein structure, the order of attachment of amino acids are linked together in protein

Answer 52

True

Question 53

The overall three-dimensional shape of a protein that results from the interactions between amino acid side chains that are widely separated from each other within a peptide chain

Answer 53

Tertiary protein structure