1. Proteins
are composed of building blocks known as:
a. Nucleotides
b. Fatty
acids
c. Amino
acids
d. Monosaccharides
2. How
many standard amino acids are commonly found in proteins?
a. 20
b. 10
c. 5
d. 50
3. The
primary structure of a protein refers to:
a. Its
three-dimensional shape
b. Its
overall size and mass
c. The
linear sequence of amino acids
d. The
presence of disulfide bonds
4. The
alpha helix and beta sheet are examples of:
a. Secondary
structures
b. Tertiary
structures
c. Quaternary
structures
d. Supersecondary
structures
5. Which
of the following amino acids is considered nonpolar?
a. Glycine
b. Serine
c. Valine
d. Aspartic
acid
6. The
process of converting a protein's native structure into a nonfunctional shape
is called:
a. Denaturation
b. Hydrolysis
c. Synthesis
d. Polymerization
7. Enzymes
are a type of protein that function as:
a. Catalysts
b. Structural
components
c. Energy
storage molecules
d. Signaling
molecules
8. Which
of the following is an essential amino acid?
a. Alanine
b. Glutamine
c. Lysine
d. Tyrosine
9. The
amino acid sequence of a protein is determined by:
a. DNA
sequence
b. RNA
sequence
c. Protein
folding
d. Post-translational
modifications
10. Hemoglobin
is an example of a protein that functions in:
a. Oxygen
transport
b. Lipid
digestion
c. Muscle
contraction
d. Signal
transduction
11. The
bond formed between two amino acids during protein synthesis is called a:
a. Glycosidic
bond
b. Peptide
bond
c. Phosphodiester
bond
d. Disulfide
bond
12. The
structure of a protein can be visualized using techniques such as:
a. X-ray
crystallography
b. Polymerase
chain reaction (PCR)
c. Gel
electrophoresis
d. Western
blotting
13. Which
of the following is an example of a post-translational modification?
a. Splicing
of introns
b. mRNA
transcription
c. Addition
of phosphate groups
d. DNA
replication
14. Which
amino acid is responsible for forming disulfide bonds in proteins?
a. Cysteine
b. Methionine
c. Proline
d. Glutamic
acid
15. The
secondary structure of a protein is stabilized by:
a. Hydrogen
bonds
b. Covalent
bonds
c. Ionic
bonds
d. Peptide
bonds
16. Which
of the following amino acids is positively charged at physiological pH?
a. Arginine
b. Asparagine
c. Threonine
d. Leucine
17. The
process by which a protein loses its structure and biological activity is
called:
a. Denaturation
b. Folding
c. Polymerization
d. Dimerization
18. Collagen
is a protein that provides structural support to:
a. Skin,
tendons, and bones
b. Blood
vessels
c. Nervous
tissue
d. Enzymes
19. Which
of the following is an example of a globular protein?
a. Insulin
b. Keratin
c. Collagen
d. Myosin
20. The
primary function of antibodies is:
a. Immune
defense
b. Enzymatic
catalysis
c. Cell
adhesion
d. Oxygen
transport
21. Which
of the following is a condition caused by protein deficiency?
a. Kwashiorkor
b. Scurvy
c. Rickets
d. Pellagra
22. The
process by which a protein folds into its functional three-dimensional
structure is called:
a. Protein
synthesis
b. Protein
denaturation
c. Protein
folding
d. Protein
digestion
23. Which
of the following amino acids is aromatic?
a. Phenylalanine
b. Glycine
c. Arginine
d. Cysteine
24. The
quaternary structure of a protein refers to:
a. The
arrangement of multiple protein subunits
b. The
overall shape of a single polypeptide chain
c. The
presence of disulfide bonds
d. The
interaction between amino acids in the same chain
25. Which
of the following is an example of a fibrous protein?
a. Keratin
b. Hemoglobin
c. Insulin
d. Myoglobin
26. The
amino acid sequence of a protein is encoded by:
a. DNA
b. RNA
c. Ribosomes
d. Golgi
apparatus
27. Which
of the following is an example of a protease?
a. Trypsin
b. Insulin
c. Hemoglobin
d. Collagen
28. Which
of the following is an example of a protein with a structural function?
a. Actin
b. Amylase
c. Hemoglobin
d. Insulin
29. The
process of breaking down proteins into amino acids is called:
a. Transcription
b. Translation
c. Proteolysis
d. Polymerization
30. The
amino acid sequence of a protein is often represented using the one-letter
code. Which amino acid is represented by the letter "R"?
a. Arginine
b. Leucine
c. Tyrosine
d. Serine
31. Which
of the following is an example of a protein with a transport function?
a. Hemoglobin
b. Insulin
c. Collagen
d. Keratin
32. The
tertiary structure of a protein is determined by:
a. Interactions
between amino acid side chains
b. The
linear sequence of amino acids
c. The
presence of disulfide bonds
d. The
number of protein subunits
33. Which
of the following is an example of a protein hormone?
a. Insulin
b. Collagen
c. Keratin
d. Myoglobin
34. Which
of the following amino acids is negatively charged at physiological pH?
a. Glutamic
acid
b. Glycine
c. Histidine
d. Isoleucine
35. The
process of protein synthesis is also known as:
a. Transcription
b. Translation
c. Replication
d. Polymerization
36. Which
of the following is an example of a protein with an enzymatic function?
a. Catalase
b. Collagen
c. Hemoglobin
d. Myosin
37. Which
of the following is an example of a protein with a signaling function?
a. Insulin
b. Actin
c. Myoglobin
d. Keratin
38. Amino
acids are linked together in proteins by:
a. Peptide
bonds
b. Glycosidic
bonds
c. Phosphodiester
bonds
d. Hydrogen
bonds
39. Which
of the following amino acids is commonly found in collagen?
a. Proline
b. Asparagine
c. Cysteine
d. Valine
40. The
process of converting RNA into protein is called:
a. Transcription
b. Translation
c. Replication
d. Polymerization
41. Which
of the following is an example of a protein with a contractile function?
a. Actin
b. Hemoglobin
c. Insulin
d. Collagen
42. Which
of the following is an example of a protein with a storage function?
a. Ferritin
b. Insulin
c. Hemoglobin
d. Myoglobin
43. The
amino acid sequence of a protein is often referred to as its:
a. Primary
structure
b. Secondary
structure
c. Tertiary
structure
d. Quaternary
structure
44. The
process of breaking down complex proteins into smaller peptides is called:
a. Hydrolysis
b. Polymerization
c. Synthesis
d. Denaturation
45. The
enzyme that catalyzes the addition of phosphate groups to proteins is called a:
a. Protein
kinase
b. Protease
c. Lipase
d. Polymerase
46. Which
of the following amino acids is unique due to its sulfur-containing side chain?
a. Methionine
b. Alanine
c. Glutamine
d. Proline
47. The
structural stability of a protein is primarily determined by its:
a. Hydrophobic
interactions
b. Electrostatic
interactions
c. Peptide
bonds
d. Hydrogen
bonds
48. Which
of the following is an example of a protein with a regulatory function?
a. Insulin
b. Collagen
c. Hemoglobin
d. Transcription
factor
49. The
process of adding carbohydrate molecules to a protein is called:
a. Glycosylation
b. Phosphorylation
c. Acetylation
d. Methylation
50. Which
of the following is an example of a protein with a defense function?
a. Antibody
b. Insulin
c. Actin
d. Hemoglobin
|
Question |
Answer |
Question |
Answer |
Question |
Answer |
Question |
Answer |
Question |
Answer |
|
1 |
C |
11 |
B |
21 |
A |
31 |
A |
41 |
A |
|
2 |
A |
12 |
A |
22 |
C |
32 |
A |
42 |
A |
|
3 |
C |
13 |
C |
23 |
A |
33 |
A |
43 |
A |
|
4 |
A |
14 |
A |
24 |
A |
34 |
A |
44 |
A |
|
5 |
C |
15 |
A |
25 |
A |
35 |
B |
45 |
A |
|
6 |
A |
16 |
A |
26 |
A |
36 |
A |
46 |
A |
|
7 |
A |
17 |
A |
27 |
A |
37 |
A |
47 |
A |
|
8 |
C |
18 |
A |
28 |
A |
38 |
A |
48 |
D |
|
9 |
A |
19 |
A |
29 |
A |
39 |
A |
49 |
A |
|
10 |
A |
20 |
A |
30 |
B |
40 |
B |
50 |
A |
