Question 1

Which of the following best describes the primary structure of a protein?

Accepted Answer

The linear sequence of amino acids linked by peptide bonds.

Question 2

Amino acids are linked together by which type of bond to form proteins?

Accepted Answer

Peptide bonds

Question 3

Which component of an amino acid varies among different amino acids and determines their unique properties?

Accepted Answer

R-group (side chain)

Question 4

Which of the following is an example of a protein found in milk?

Accepted Answer

Casein

Question 5

What is the correct general formula for a saccharide unit in carbohydrates?

Accepted Answer

$$C_n(H_2O)_n$$,\ n \geq 3$

Question 6

Which of the following statements about essential amino acids is TRUE?

Accepted Answer

They must be obtained from the diet.

Question 7

Which protein structure level is most difficult to destroy and consists of a linear sequence of amino acids?

Accepted Answer

Primary structure

Question 8

Which of the following is a soy protein?

Accepted Answer

Tofu

Question 9

If a protein is denatured by heat, which of its properties is most likely to change?

Accepted Answer

Its functional property as a food ingredient

Question 10

Which of the following correctly matches a protein source with its type?

Accepted Answer

Meat protein: collagen

Question 11

Which of the following is NOT a function of proteins in food products?

Accepted Answer

Acting as a primary energy source

Question 12

Which protein structure is characterized by the arrangement of two or more tertiary structures?

Accepted Answer

Quaternary structure

Question 13

Which of the following is a correct description of a peptide bond?

Accepted Answer

A bond between the carboxyl group of one amino acid and the amino group of another

Question 14

Which of the following is a complete protein source?

Accepted Answer

Beans

Question 15

Which of the following is TRUE about the secondary structure of proteins?

Accepted Answer

It involves alpha-helix and beta-sheet arrangements.

Question 16

Which of the following is NOT a typical element found in amino acids?

Accepted Answer

Phosphorus

Question 17

Which of the following statements about peptide bonds is correct?

Accepted Answer

They link amino acids to form proteins.

Question 18

Which of the following is an example of a protein that provides elasticity to dough?

Accepted Answer

Gluten

Question 19

Which of the following is a property of the tertiary structure of proteins?

Accepted Answer

Further folding of the chain to form a three-dimensional shape

Question 20

Which of the following is a correct match between a protein and its food source?

Accepted Answer

Collagen: meat

Food Proteins: Structure, Types, and Functions in Nutrition

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