Molecular Biophysics MCQs 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 type of RNA carries the genetic code from DNA to the ribosome?

rRNA

tRNA

mRNA

2 / 40

What is the main function of a mitochondrion?

Store calcium

Synthesize proteins

Produce ATP

3 / 40

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

Stabilize protein structures

Transfer electrons

Form strong covalent bonds

4 / 40

What is the role of hemoglobin?

Catalyze reactions

Transport oxygen

Replicate DNA

5 / 40

What is the purpose of molecular docking in drug design?

Sequence DNA

Determine molecular weight

Predict binding affinity

6 / 40

What is the role of hydrogen bonds in DNA structure?

Catalyze reactions

Stabilize the double helix

Signal transduction

7 / 40

What is the primary force driving protein folding?

Hydrophobic interactions

Covalent bonding

Ionic bonding

8 / 40

What technique is used to amplify specific DNA sequences?

Flow cytometry

PCR

ELISA

9 / 40

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

Western blotting

Mass spectrometry

Chromatography

10 / 40

What is the purpose of a Western blot?

Amplify DNA

Separate RNA

Detect specific proteins

11 / 40

What is the main purpose of molecular dynamics simulations?

Sequence DNA

Amplify RNA

Study movement of molecules

12 / 40

What is the main role of tRNA in protein synthesis?

Replicate DNA

Catalyze peptide bonds

Transfer amino acids

13 / 40

What is the main function of a lysosome?

Synthesize proteins

Replicate DNA

Degrade cellular waste

14 / 40

What is a ligand?

Component of cell membrane

Enzyme that catalyzes reactions

Molecule that binds to a receptor

15 / 40

Which spectroscopy technique is used to determine protein secondary structure?

Mass spectrometry

Circular dichroism

UV-Vis spectroscopy

16 / 40

Which structure forms the backbone of a DNA molecule?

Fatty acid chains

Peptide bonds

Sugar-phosphate backbone

17 / 40

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

Binds to allosteric site

Denatures the enzyme

Competes with substrate for active site

18 / 40

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

Study molecular interactions

Measure enzyme activity

Sequence DNA

19 / 40

What is the primary function of DNA polymerase?

Repair DNA

Replicate DNA

Transcribe RNA

20 / 40

What does NMR spectroscopy measure in biomolecules?

Enzyme activity

Atomic-level structure

Protein-ligand interactions

21 / 40

What is an alpha helix?

A type of tertiary structure

A type of secondary structure

A type of quaternary structure

22 / 40

What is a common use of cryo-electron microscopy?

Measure DNA concentration

Determine structures of large complexes

Separate proteins

23 / 40

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

Gel electrophoresis

X-ray crystallography

Northern blotting

24 / 40

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

Anchor proteins

Allow ions to pass through

Signal transduction

25 / 40

What does a Michaelis-Menten plot describe?

Enzyme kinetics

DNA melting

Protein folding

26 / 40

What is the role of NADH in cellular respiration?

Hormone

Electron carrier

Structural support

27 / 40

What is an example of a quaternary protein structure?

Beta turn

Hemoglobin

Alpha helix

28 / 40

Which molecule acts as the energy currency of the cell?

ATP

DNA

RNA

29 / 40

What is the purpose of a molecular chaperone?

Transcribe DNA

Degrade misfolded proteins

Assist in protein folding

30 / 40

Which type of molecule is an enzyme?

Protein

Lipid

Carbohydrate

31 / 40

Which technique uses antibodies to detect specific proteins?

Gel electrophoresis

PCR

ELISA

32 / 40

What is the function of a ribosome?

Degrade mRNA

Synthesize proteins

Replicate DNA

33 / 40

Which technique is used to separate proteins based on size?

Mass spectrometry

SDS-PAGE

NMR spectroscopy

34 / 40

What is an example of a secondary structure in proteins?

Disulfide bond

Primary sequence

Beta sheet

35 / 40

Which method is used to measure protein-ligand interactions?

Surface plasmon resonance

SDS-PAGE

PCR

36 / 40

What is the effect of phosphorylation on proteins?

Denatures the protein

Modifies activity and function

Degrades the protein

37 / 40

What type of bond links amino acids in a protein?

Ionic bond

Hydrogen bond

Peptide bond

38 / 40

What is the typical structure of a phospholipid bilayer?

Hydrophilic heads and hydrophobic tails

Hydrophobic heads and hydrophilic tails

All hydrophilic

39 / 40

What is the basic unit of chromatin?

Ribosome

Lysosome

Nucleosome

40 / 40

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

Spontaneity of the reaction

Speed of the reaction

Temperature dependence

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