Biology MCQs

Biochemistry MCQs with Answers

Which of the following is the primary energy storage molecule in cells?
a) Glucose
b) ATP
c) DNA
d) RNA
Answer: b) ATP

Which of the following is the monomer unit of proteins?
a) Amino acids
b) Nucleotides
c) Fatty acids
d) Monosaccharides
Answer: a) Amino acids

Which of the following is the process by which a double-stranded DNA molecule is separated into two single strands?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: d) Denaturation

Which of the following is the major carbohydrate storage molecule in animals?
a) Glycogen
b) Starch
c) Cellulose
d) Chitin
Answer: a) Glycogen

Which of the following is the process by which genetic information is transferred from DNA to RNA?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: a) Transcription

Which of the following is the enzyme responsible for breaking down carbohydrates in the mouth?
a) Amylase
b) Lipase
c) Protease
d) Pepsin
Answer: a) Amylase

Which of the following is the process by which amino acids are joined together to form a protein?
a) Transcription
b) Translation
c) Replication
d) Condensation
Answer: b) Translation

Which of the following is the primary component of cell membranes?
a) Proteins
b) Carbohydrates
c) Lipids
d) Nucleic acids
Answer: c) Lipids

Which of the following is the process by which glucose is converted into pyruvate in the cytoplasm?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Oxidative phosphorylation
Answer: a) Glycolysis

Which of the following is the molecule that carries the genetic information in cells?
a) DNA
b) RNA
c) ATP
d) Glucose
Answer: a) DNA

Which of the following is the process by which ATP is synthesized from ADP and inorganic phosphate?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Oxidative phosphorylation
Answer: d) Oxidative phosphorylation

Which of the following is the enzyme responsible for breaking down proteins in the stomach?
a) Amylase
b) Lipase
c) Protease
d) Pepsin
Answer: d) Pepsin

Which of the following is the process by which RNA is used to synthesize a protein?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: b) Translation

Which of the following is the process by which a single-stranded RNA molecule is synthesized from a DNA template?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: a) Transcription

Which of the following is the process by which glucose is converted into pyruvate in the presence of oxygen?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Oxidative phosphorylation
Answer: b) Krebs cycle

Which of the following is the monomer unit of nucleic acids?
a) Amino acids
b) Nucleotides
c) Fatty acids
d) Monosaccharides
Answer: b) Nucleotides

Which of the following is the process by which a double-stranded DNA molecule is replicated to produce two identical copies?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: c) Replication

Which of the following is the primary storage form of lipids in plants?
a) Glycogen
b) Starch
c) Cellulose
d) Chitin
Answer: b) Starch

Which of the following is the process by which genetic information is used to synthesize a protein?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: b) Translation

Which of the following is the enzyme responsible for breaking down lipids in the small intestine?
a) Amylase
b) Lipase
c) Protease
d) Pepsin
Answer: b) Lipase

Which of the following is the process by which glucose is converted into lactic acid in the absence of oxygen?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Fermentation
Answer: d) Fermentation

Which of the following is the process by which glucose is converted into ATP in the presence of oxygen?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Oxidative phosphorylation
Answer: d) Oxidative phosphorylation

Which of the following is the process by which nucleotides are joined together to form a DNA molecule?
a) Transcription
b) Translation
c) Replication
d) Condensation
Answer: c) Replication

Which of the following is the process by which proteins are broken down into amino acids?
a) Hydrolysis
b) Condensation
c) Dehydration synthesis
d) Denaturation
Answer: a) Hydrolysis

Which of the following is the process by which RNA is used to synthesize a complementary RNA molecule?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: a) Transcription

Which of the following is the molecule that serves as a temporary carrier of energy in cells?
a) DNA
b) RNA
c) ATP
d) Glucose
Answer: c) ATP

Which of the following is the process by which glucose is converted into ATP in the cytoplasm?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Oxidative phosphorylation
Answer: a) Glycolysis

Which of the following is the process by which lipids are broken down into fatty acids and glycerol?
a) Hydrolysis
b) Condensation
c) Dehydration synthesis
d) Denaturation
Answer: a) Hydrolysis

Which of the following is the process by which a protein’s three-dimensional structure is disrupted?
a) Denaturation
b) Hydrolysis
c) Condensation
d) Dehydration synthesis
Answer: a) Denaturation

Which of the following is the enzyme responsible for catalyzing the synthesis of DNA?
a) DNA polymerase
b) RNA polymerase
c) DNA ligase
d) DNA helicase
Answer: a) DNA polymerase

Which of the following is the process by which ATP is synthesized directly from ADP and inorganic phosphate?
a) Glycolysis
b) Krebs cycle
c) Substrate-level phosphorylation
d) Oxidative phosphorylation
Answer: c) Substrate-level phosphorylation

Which of the following is the process by which glucose is converted into ATP using the energy released from the electron transport chain?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Oxidative phosphorylation
Answer: d) Oxidative phosphorylation

Which of the following is the process by which DNA is copied to produce a new DNA molecule?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: c) Replication

Which of the following is the enzyme responsible for catalyzing the synthesis of RNA?
a) DNA polymerase
b) RNA polymerase
c) DNA ligase
d) DNA helicase
Answer: b) RNA polymerase

Which of the following is the process by which glucose is converted into pyruvate in the absence of oxygen?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Fermentation
Answer: a) Glycolysis

Which of the following is the process by which ATP is synthesized using the energy released from the movement of protons across a membrane?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Chemiosmosis
Answer: d) Chemiosmosis

Which of the following is the process by which glucose is converted into ATP in the presence of oxygen?
a) Glycolysis
b) Krebs cycle
c) Electron transport chain
d) Oxidative phosphorylation
Answer: d) Oxidative phosphorylation

Which of the following is the process by which lipids are synthesized from fatty acids and glycerol?
a) Hydrolysis
b) Condensation
c) Dehydration synthesis
d) Lipogenesis
Answer: d) Lipogenesis

Which of the following is the process by which proteins are synthesized using the genetic information carried by RNA?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: b) Translation

Which of the following is the process by which DNA is transcribed into RNA?
a) Transcription
b) Translation
c) Replication
d) Denaturation
Answer: a) Transcription

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button