Proteins

Question 1

What are proteins made of?

Answer 1

Proteins are made of amino acids.

Question 2

True or False: Proteins are only found in animal products.

Answer 2

False.

Question 3

Fill in the blank: The sequence of amino acids in a protein is known as its _____ structure.

Answer 3

primary

Question 4

What type of bond links amino acids together in a protein?

Answer 4

Peptide bond.

Question 5

What is the function of enzymes in biological systems?

Answer 5

Enzymes act as catalysts to speed up chemical reactions.

Question 6

Multiple Choice: Which of the following is NOT a function of proteins? A) Transport B) Storage C) Photosynthesis D) Defense

Answer 6

C) Photosynthesis.

Question 7

What is the name of the process by which proteins are synthesized?

Answer 7

Translation.

Question 8

True or False: All proteins are enzymes.

Answer 8

False.

Question 9

What structural level of proteins involves the folding of the polypeptide chain into a 3D shape?

Answer 9

Tertiary structure.

Question 10

Fill in the blank: The _____ structure of a protein is formed by multiple polypeptide chains coming together.

Answer 10

quaternary

Question 11

What is the role of hemoglobin in the body?

Answer 11

Hemoglobin carries oxygen in the blood.

Question 12

True or False: Proteins can serve as hormones.

Answer 12

True.

Question 13

Multiple Choice: Which amino acid is essential and must be obtained from the diet? A) Glycine B) Alanine C) Leucine D) Glutamine

Answer 13

C) Leucine.

Question 14

What is the term for proteins that assist in the proper folding of other proteins?

Answer 14

Chaperones.

Question 15

What are the building blocks of proteins?

Answer 15

Amino acids.

Question 16

Fill in the blank: Proteins that speed up chemical reactions are called _____ .

Answer 16

enzymes.

Question 17

What is the function of antibodies in the immune system?

Answer 17

Antibodies help to identify and neutralize pathogens.

Question 18

True or False: The shape of a protein is crucial for its function.

Answer 18

True.

Question 19

Multiple Choice: Which structure is primarily responsible for the specificity of enzyme activity? A) Primary B) Secondary C) Tertiary D) Quaternary

Answer 19

C) Tertiary.

Question 20

What is the role of collagen in the body?

Answer 20

Collagen provides structural support in connective tissues.

Question 21

Fill in the blank: The _____ structure of a protein is determined by hydrogen bonds between the backbone atoms.

Answer 21

secondary

Question 22

What are the two main types of protein structures?

Answer 22

Fibrous and globular.

Question 23

True or False: Proteins can be denatured by changes in temperature and pH.

Answer 23

True.

Question 24

Multiple Choice: Which of the following is a globular protein? A) Keratin B) Hemoglobin C) Collagen D) Elastin

Answer 24

B) Hemoglobin.

Question 25

What is the function of transport proteins?

Answer 25

Transport proteins move molecules across cell membranes.

Question 26

Fill in the blank: The _____ model describes how enzymes and substrates fit together.

Answer 26

lock and key

Question 27

What is a protein's isoelectric point?

Answer 27

The pH at which a protein has no net charge.

Question 28

True or False: Proteins are not involved in cellular signaling.

Answer 28

False.

Question 29

Multiple Choice: Which of the following amino acids is nonpolar? A) Serine B) Proline C) Aspartic acid D) Lysine

Answer 29

B) Proline.

Question 30

What is the significance of protein folding?

Answer 30

Proper folding is essential for protein function.

Question 31

Fill in the blank: The _____ structure of a protein is determined by the sequence of amino acids.

Answer 31

primary

Question 32

What type of interaction stabilizes the tertiary structure of proteins?

Answer 32

Hydrophobic interactions, ionic bonds, hydrogen bonds, and disulfide bridges.

Question 33

True or False: All proteins consist of the same 20 amino acids.

Answer 33

True.

Question 34

What is the role of signaling proteins?

Answer 34

Signaling proteins transmit information within and between cells.

Question 35

Multiple Choice: Which type of protein is involved in muscle contraction? A) Structural B) Enzymatic C) Contractile D) Storage

Answer 35

C) Contractile.