Biochemistry Important MCQs

By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

Set of Important MCQs on Basics and foundations of Biochemistry for the preparation of tests for chemistry and biology. 

The diameter of a typical plant or animal cell is

  1. 5 to 10 μm
  2. 1 to 5 μm
  3. 10 to 20 µm
  4. 5 to 100 μm

Question Answer: 5 to 100 μm

The characterization of the structure, function, evolution and mapping is known as______

  1. Bioenergetics
  2. Genomics
  3. Glycolysis
  4. Proteomics

Question Answer: Proteomics

Shorter polymers are known as______

  1. Monomer
  2. Oligomers
  3. Dimers
  4. Tetramers

Question Answer: Oligomers

___ is the  component of the cell enclosed by the plasma membrane?

  1. Cytosol
  2. Cytoplasm
  3. Nuclear membrane
  4. Ribosomes

Question Answer: Cytoplasm

Which of the mentioned is particulate component of the cell?

  1. Mitochondria
  2. Chloroplast
  3. Ribosomes
  4. All A, B, and C

Question Answer: All A, B, and C

Which of the mentioned structural components separates the contents of the cell from the surroundings?

  1. Cytosol
  2. Cytoplasm
  3. Nucleus
  4. Plasma membrane

Question Answer: Plasma membrane

Which is the site for protein synthesis and degradation?

  1. Ribosome
  2. Golgi apparatus
  3. Chloroplast
  4. Mitochondria

Question Answer: Ribosome

In which part of the cell the genome is replicated?

  1. Nuclear membrane
  2. Cytoplasm
  3. Nucleus apparatus
  4. Golgi

Question Answer: Nucleus apparatus

Cells with nuclear envelop belongs to

  1. Prokaryotes
  2. Eukaryotes
  3. Polykaryotes
  4. None of A, B, and C

Question Answer: Eukaryotes

Bactearia and archaca are also known as______

  1. Prokaryotes
  2. Polykaryotes
  3. Eukaryotes
  4. None of A, B, and C

Question Answer: Prokaryotes

The branch of science concerned with the chemical and physico-chemical processes and substances that occur within living organisms is known as______

  1. Analytical Chemistry
  2. Biochemistry
  3. Physical Chemistry
  4. Organic Chemistry

Question Answer: Biochemistry

Which of the mentioned substances belong to complex biomolecules?

  1. Lipids
  2. Carbohydrates
  3. Proteins

D All

Question Answer: All

Which of the mentioned is not habitat of archaea?

A: Salt lakes

  1. Hot spring
  2. Acidic boga

D: Soils

Question Answer: Soils

The obligate organisms die when exposed to les

  1. Hydrogen
  2. Oxygen
  3. Nitrogen
  4. Methanel

Question Answer: Oxygen

The organisms which obtain their energy from sunlight are known as______

  1. Autotrophs
  2. Chemotrophs
  3. Phototrophs
  4. Heterotrophs

Question Answer: Phototrophs

The organisms which obtain their energy from oxidation of a chemical fuel are known as______

  1. Chemotrophe
  2. Autotrophs
  3. Heterotrophs
  4. Autotropha

Question Answer: Chemotrophe

Which of the following are the organisms which synthesize all of their biomolecules directly from carbon dioxide.

  1. Autotrophs
  2. Chemotrophs
  3. Heterotrophs
  4. Autotrophe

Question Answer: Autotrophe

Which of the mentioned cell organelles is concerned with energy extraction reactions of the cell?

  1. Ribosomes
  2. Lysosomes
  3. Mitochondria
  4. Golgi complex

Question Answer: Mitochondria

Which of the mentioned cell organelles is concerned with degradation of cell debris?

  1. Lysosomes
  2. Endoplasmic reticulum
  3. Golgi complex
  4. Nucleotide

Question Answer: Lysosomes

Which of the following are the small circular segments of DNA in nucleus?

  1. Endoplasmic reticulum
  2. Plasmids
  3. Lysosomes
  4. Nucleotide

Question Answer: Plasmids

Which of the following is the mechanism of transport of metabolites from the cell to its surroundings?

  1. Endocytosis
  2. Osmosis
  3. Diffusion
  4. Exocytosis

Question Answer: Exocytosis

The monomeric subunits of proteins, nucleic acids and polysaccharadies are joined through

  1. Covalent bonds
  2. H-bonds
  3. Ionic bonds
  4. Metallic bonds

Question Answer: Covalent bonds

Which of the mentioned non-covalent interactions are present in macromolecules like proteins, enzymes, polysaccharides etc.?

  1. Hydrophobic interactions
  2. van der Waals interactions
  3. H-bonds
  4. All A, B, and C

Question Answer: All A, B, and C

One Dalton is equal to one twelth the mass of an atom of

  1. H-1
  2. O-16
  3. N-14
  4. C-12

Question Answer: C-12

Which of the mentioned functional groups are present in the biomolecules like proteins, nucleotides etc.

  1. Carboxylic
  2. Amino
  3. Hydroxyl
  4. All A, B, and C

Question Answer: All A, B, and C

The sum of all the proteins functioning in a given cell is known as.

  1. Enzymology
  2. Proteomics
  3. Microbiology
  4. Virology

Question Answer: Proteomics

The lipid comprising molecules in a cell constitute its________.

  1. Lipidome
  2. Glycome
  3. Proteome
  4. Metabolome

Question Answer: Lipidome

The carbohydrate comprising molecules in a cell constitute its ______.

  1. Proteome
  2. Lipidome
  3. Glycome
  4. Metabolome

Question Answer: Glycome

The entire collection of small molecules in a given cell under a specific set of conditions is known as

  1. Proteome
  2. Lipidome
  3. Glycome
  4. Metabolome

Question Answer: Glycome

The systematic characterization of the metabolome under very specific conditions is known as ______

  1. Genomics
  2. Proteomics
  3. Metabolomics
  4. Genetics

Question Answer: Metabolomics

The particulate components sediment when cytoplasm is centrifuged at—

  1. 15,000 g
  2. 1700 g
  3. 230,000 g
  4. 130 g.

Question Answer: 15000 g

The aqueous component of the cytoplasm of a cell, within which various organelles and particles are suspended, is known as______

  1. Nucleus
  2. Cytosol
  3. Proteasomes
  4. Ribosome

Question Answer: Cytosol

Which of the mentioned components is part of cytosol?

  1. Inorganic ions
  2. RNA molecules
  3. Enzymes
  4. All A, B, and C

Question Answer: All A, B, and C

What is the diameter of many unicellular microorganism?

  1. 12 to 22 μm
  2. 3 to 7 μm
  3. 1 to 2 μm
  4. 5 to 100 μm

Question Answer: 1 to 2 μm

Which of the mentioned is not habitat of bacteria?

  1. Soils
  2. Surface water
  3. Salt lakes
  4. Tissues of decaying materails

Question Answer: Salt lakes

More Biochemistry MCQs

  1. Acid and Base MCQs
  2. Carbohydrate MCQs
  3. Proteins MCQs
  4. Lipids and Biomembranes MCQs
  5. Nucleic acids MCQs
  6. Metabolism of Carbohydrates MCQs
  7. Enzymes MCQs
  8. Vitamins and Hormones MCQs
  9. Bioenergetic MCQs
  10. Biotechnology MCQs
  11. Biotechnology MCQs 2
  12. Basic Biochemistry MCQs (important)
  13. CHEMISTRY MCQs From all subjects of  Chemistry

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