#1
Which biomolecule is the main source of energy for cellular processes?
Carbohydrates
ExplanationCarbohydrates are the primary energy source for cellular processes.
#2
Which of the following is NOT a function of proteins in the cell?
Energy storage
ExplanationProteins 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
ExplanationCarbohydrates have a general formula of (CH2O)n.
#4
Which enzyme catalyzes the conversion of sucrose into glucose and fructose?
Sucrase
ExplanationSucrase 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
ExplanationLipids 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
ExplanationFermentation 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
ExplanationATP primarily functions to transfer energy within cells.
#8
During glycolysis, glucose is converted into which molecule?
Pyruvate
ExplanationGlucose is converted into pyruvate during glycolysis.
#9
Which organelle is responsible for producing ATP through oxidative phosphorylation?
Mitochondrion
ExplanationMitochondria 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
ExplanationThe 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
ExplanationRNA contains uracil nucleotide, unlike DNA.
#12
Which of the following is NOT a component of an amino acid?
Phosphate group
ExplanationPhosphate group is not a component of an amino acid.
#13
What is the function of DNA polymerase in DNA replication?
Synthesizes new DNA strands
ExplanationDNA polymerase synthesizes new DNA strands during DNA replication.
#14
What is the function of ribosomes in cellular metabolism?
Protein synthesis
ExplanationRibosomes are responsible for protein synthesis.
#15
Which of the following is NOT a component of a nucleotide?
Hydrogen atom
ExplanationHydrogen atom is not a component of a nucleotide.
#16
Which of the following is an example of a secondary structure in proteins?
Alpha helix
ExplanationAlpha helix is an example of a secondary structure in proteins.
#17
Which of the following is an example of a reducing sugar?
Glucose
ExplanationGlucose is an example of a reducing sugar.
#18
What is the role of phospholipids in cellular metabolism?
Cell membrane structure
ExplanationPhospholipids contribute to cell membrane structure.
#19
Which of the following is NOT a component of a triglyceride?
Phosphate group
ExplanationPhosphate group is not a component of a triglyceride.