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Biomolecules and Cellular Metabolism Quiz

#1

Which biomolecule is the main source of energy for cellular processes?

Carbohydrates
Explanation

Carbohydrates are the primary energy source for cellular processes.

#2

Which of the following is NOT a function of proteins in the cell?

Energy storage
Explanation

Proteins do not serve as energy storage in cells.

#3

Which of the following is a characteristic feature of carbohydrates?

Have a general formula of (CH2O)n
Explanation

Carbohydrates have a general formula of (CH2O)n.

#4

Which enzyme catalyzes the conversion of sucrose into glucose and fructose?

Sucrase
Explanation

Sucrase catalyzes the conversion of sucrose into glucose and fructose.

#5

Which of the following is NOT a function of lipids in cellular metabolism?

Enzymatic catalysis
Explanation

Lipids do not participate in enzymatic catalysis in cellular metabolism.

#6

What is the name of the process by which cells break down glucose in the absence of oxygen to produce energy?

Fermentation
Explanation

Fermentation is the process of breaking down glucose in the absence of oxygen to produce energy.

#7

What is the primary function of ATP in cellular metabolism?

To transfer energy within cells
Explanation

ATP primarily functions to transfer energy within cells.

#8

During glycolysis, glucose is converted into which molecule?

Pyruvate
Explanation

Glucose is converted into pyruvate during glycolysis.

#9

Which organelle is responsible for producing ATP through oxidative phosphorylation?

Mitochondrion
Explanation

Mitochondria produce ATP through oxidative phosphorylation.

#10

What is the primary function of the citric acid cycle (Krebs cycle) in cellular metabolism?

To oxidize acetyl-CoA to produce CO2 and high-energy electrons
Explanation

The primary function of the citric acid cycle is to oxidize acetyl-CoA to produce CO2 and high-energy electrons.

#11

Which of the following is a characteristic of RNA but NOT DNA?

Contains uracil nucleotide
Explanation

RNA contains uracil nucleotide, unlike DNA.

#12

Which of the following is NOT a component of an amino acid?

Phosphate group
Explanation

Phosphate group is not a component of an amino acid.

#13

What is the function of DNA polymerase in DNA replication?

Synthesizes new DNA strands
Explanation

DNA polymerase synthesizes new DNA strands during DNA replication.

#14

What is the function of ribosomes in cellular metabolism?

Protein synthesis
Explanation

Ribosomes are responsible for protein synthesis.

#15

Which of the following is NOT a component of a nucleotide?

Hydrogen atom
Explanation

Hydrogen atom is not a component of a nucleotide.

#16

Which of the following is an example of a secondary structure in proteins?

Alpha helix
Explanation

Alpha helix is an example of a secondary structure in proteins.

#17

Which of the following is an example of a reducing sugar?

Glucose
Explanation

Glucose is an example of a reducing sugar.

#18

What is the role of phospholipids in cellular metabolism?

Cell membrane structure
Explanation

Phospholipids contribute to cell membrane structure.

#19

Which of the following is NOT a component of a triglyceride?

Phosphate group
Explanation

Phosphate group is not a component of a triglyceride.

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