Molecular Biophysics Quiz with Answers

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Molecular Biophysics Online Quiz

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• Test Name: Molecular Biophysics MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Molecular Biophysics

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1 / 40

What is the effect of a competitive inhibitor on an enzyme?

Competes with substrate for active site

Denatures the enzyme

Binds to allosteric site

2 / 40

Which method is used to measure protein-ligand interactions?

PCR

SDS-PAGE

Surface plasmon resonance

3 / 40

Which type of molecule is an enzyme?

Lipid

Protein

Carbohydrate

4 / 40

Which structure forms the backbone of a DNA molecule?

Sugar-phosphate backbone

Fatty acid chains

Peptide bonds

5 / 40

Which molecule acts as the energy currency of the cell?

DNA

ATP

RNA

6 / 40

What type of RNA carries the genetic code from DNA to the ribosome?

tRNA

rRNA

mRNA

7 / 40

What is the role of NADH in cellular respiration?

Hormone

Electron carrier

Structural support

8 / 40

What is the role of hydrogen bonds in DNA structure?

Signal transduction

Stabilize the double helix

Catalyze reactions

9 / 40

What is the purpose of a molecular chaperone?

Transcribe DNA

Degrade misfolded proteins

Assist in protein folding

10 / 40

What is the primary function of DNA polymerase?

Replicate DNA

Repair DNA

Transcribe RNA

11 / 40

What technique is used to amplify specific DNA sequences?

PCR

Flow cytometry

ELISA

12 / 40

What is the basic unit of chromatin?

Ribosome

Nucleosome

Lysosome

13 / 40

What is the main role of tRNA in protein synthesis?

Replicate DNA

Transfer amino acids

Catalyze peptide bonds

14 / 40

Which technique measures the mass-to-charge ratio of ions?

Chromatography

Mass spectrometry

Western blotting

15 / 40

What is the function of a ribosome?

Synthesize proteins

Degrade mRNA

Replicate DNA

16 / 40

What is an example of a quaternary protein structure?

Beta turn

Hemoglobin

Alpha helix

17 / 40

What is the main function of a lysosome?

Synthesize proteins

Replicate DNA

Degrade cellular waste

18 / 40

What is an example of a secondary structure in proteins?

Primary sequence

Disulfide bond

Beta sheet

19 / 40

What is a ligand?

Molecule that binds to a receptor

Component of cell membrane

Enzyme that catalyzes reactions

20 / 40

What does a Michaelis-Menten plot describe?

Enzyme kinetics

Protein folding

DNA melting

21 / 40

What is the main purpose of molecular dynamics simulations?

Amplify RNA

Study movement of molecules

Sequence DNA

22 / 40

What does NMR spectroscopy measure in biomolecules?

Atomic-level structure

Protein-ligand interactions

Enzyme activity

23 / 40

What is the significance of van der Waals forces in biomolecular interactions?

Form strong covalent bonds

Stabilize protein structures

Transfer electrons

24 / 40

What is the purpose of a Western blot?

Detect specific proteins

Amplify DNA

Separate RNA

25 / 40

Which technique uses antibodies to detect specific proteins?

ELISA

Gel electrophoresis

PCR

26 / 40

What is the purpose of molecular docking in drug design?

Determine molecular weight

Predict binding affinity

Sequence DNA

27 / 40

What is the effect of phosphorylation on proteins?

Denatures the protein

Modifies activity and function

Degrades the protein

28 / 40

What type of bond links amino acids in a protein?

Peptide bond

Ionic bond

Hydrogen bond

29 / 40

What is fluorescence resonance energy transfer (FRET) used for?

Study molecular interactions

Measure enzyme activity

Sequence DNA

30 / 40

What is the role of hemoglobin?

Catalyze reactions

Replicate DNA

Transport oxygen

31 / 40

What is the typical structure of a phospholipid bilayer?

All hydrophilic

Hydrophilic heads and hydrophobic tails

Hydrophobic heads and hydrophilic tails

32 / 40

Which spectroscopy technique is used to determine protein secondary structure?

Mass spectrometry

UV-Vis spectroscopy

Circular dichroism

33 / 40

What technique is commonly used to determine the 3D structure of proteins?

Gel electrophoresis

X-ray crystallography

Northern blotting

34 / 40

What is a common use of cryo-electron microscopy?

Determine structures of large complexes

Measure DNA concentration

Separate proteins

35 / 40

Which technique is used to separate proteins based on size?

NMR spectroscopy

Mass spectrometry

SDS-PAGE

36 / 40

What is the primary force driving protein folding?

Covalent bonding

Hydrophobic interactions

Ionic bonding

37 / 40

What is the Gibbs free energy change (ΔG) indicative of in a biochemical reaction?

Speed of the reaction

Temperature dependence

Spontaneity of the reaction

38 / 40

What is the main function of a mitochondrion?

Store calcium

Synthesize proteins

Produce ATP

39 / 40

What is the function of an ion channel in a cell membrane?

Anchor proteins

Allow ions to pass through

Signal transduction

40 / 40

What is an alpha helix?

A type of secondary structure

A type of tertiary structure

A type of quaternary structure

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