Protein Folding MCQs with Answers

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Protein Folding Online Quiz

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• Test Name: Protein Folding MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Protein Folding

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1 / 40

What is the Anfinsen's dogma?

Protein sequence determines folding

Proteins need chaperones

Proteins can refold independently

2 / 40

What determines the primary structure of a protein?

Presence of cofactors

Sequence of amino acids

Type of chaperones

3 / 40

What is the role of the proteasome?

Synthesize proteins

Transport proteins

Degrade misfolded proteins

4 / 40

What is the main driving force for protein folding?

Hydrophobic interactions

Hydrogen bonding

Covalent bonding

5 / 40

What technique is commonly used to determine protein structure?

X-ray crystallography

Polymerase chain reaction

Gel electrophoresis

6 / 40

What term describes a protein's loss of its native structure?

Denaturation

Aggregation

Renaturation

7 / 40

What does the term "denaturation" refer to?

Loss of 3D structure

Synthesis of new proteins

Formation of peptide bonds

8 / 40

What can mutations in the coding sequence of a protein lead to?

Misfolding

Correct folding

Increased expression

9 / 40

Which type of bond is NOT commonly involved in stabilizing protein tertiary structure?

Hydrogen bond

Disulfide bond

Phosphodiester bond

10 / 40

Which amino acid is known as a helix breaker?

Alanine

Proline

Glycine

11 / 40

What is the native state of a protein?

The functional 3D form

The denatured form

The unfolded form

12 / 40

What effect does pH have on protein folding?

Increases hydrophobic interactions

Stabilizes disulfide bonds

Alters ionic interactions

13 / 40

What term describes the overall 3D structure of a single protein molecule?

Secondary structure

Tertiary structure

Quaternary structure

14 / 40

What can be used to refold denatured proteins?

RNA

Chaperones

ATP

15 / 40

What is an example of a post-translational modification affecting protein folding?

Translation

Transcription

Phosphorylation

16 / 40

What is the Levinthal's paradox in protein folding?

All proteins fold at the same rate

Protein folding is not random

Protein folding is spontaneous

17 / 40

What can cause protein aggregation?

Misfolding

Correct folding

Gene expression

18 / 40

Which type of protein structure involves the assembly of multiple polypeptide chains?

Quaternary structure

Secondary structure

Tertiary structure

19 / 40

What structural feature is common in transmembrane proteins?

Random coils

Alpha helices

Beta sheets

20 / 40

What does CD spectroscopy measure in proteins?

Protein concentration

Primary structure

Secondary structure

21 / 40

Which interaction is NOT involved in maintaining protein tertiary structure?

Ionic bonds

Hydrogen bonds

Phosphodiester bonds

22 / 40

What is the role of chaperone proteins?

Transport proteins

Degrade misfolded proteins

Assist in protein folding

23 / 40

What is the significance of beta-turns in protein structure?

Connects alpha helices and beta sheets

Stabilizes the tertiary structure

Forms the protein core

24 / 40

What is the unfolded protein response?

Protein synthesis regulation

Cellular stress response

Formation of beta sheets

25 / 40

What is protein crystallography used for?

Measure protein size

Determine 3D structure

Analyze protein function

26 / 40

What is the molten globule state in protein folding?

Unfolded state

Intermediate state

Fully folded state

27 / 40

Which factor can induce protein denaturation?

High pH

Heat

Low light

28 / 40

What is the primary driving force behind the formation of alpha helices and beta sheets?

Covalent bonding

Ionic bonding

Hydrogen bonding

29 / 40

Which protein misfolding disease is characterized by the accumulation of amyloid plaques?

Parkinson's disease

Cystic fibrosis

Alzheimer's disease

30 / 40

What is a prion?

Infectious protein

Carbohydrate

Nucleic acid

31 / 40

What happens during protein misfolding?

Increased stability

New functions are gained

Function is lost

32 / 40

What does the term "protein folding funnel" refer to?

Energy landscape of folding

Protein synthesis process

Protein degradation pathway

33 / 40

Which molecule assists in protein folding by preventing aggregation?

ATP

Chaperone

Ribosome

34 / 40

What is the term for proteins that assist other proteins to fold correctly?

Enzymes

Receptors

Chaperones

35 / 40

What structure is characterized by alpha helices and beta sheets?

Quaternary structure

Primary structure

Secondary structure

36 / 40

What is the first step of protein folding?

Formation of quaternary structure

Protein denaturation

Formation of secondary structure

37 / 40

What technique can be used to monitor protein folding in real-time?

PCR

Western blotting

Fluorescence spectroscopy

38 / 40

Which structure is described by the sequence of amino acids in a protein?

Tertiary structure

Primary structure

Secondary structure

39 / 40

What is the significance of disulfide bonds in proteins?

Stabilize protein structure

Signal transduction

Catalyze reactions

40 / 40

What disease is associated with protein misfolding and aggregation?

Diabetes

Alzheimer's disease

Hypertension

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