#1
Which of the following is not a biological macromolecule?
Protein
Lipid
Glucose
Nucleic Acid
#2
Which of the following is a polysaccharide?
Glucose
Fructose
Starch
Sucrose
#3
Which of the following is NOT a component of a nucleotide?
Phosphate group
Ribose sugar
Nitrogenous base
Fatty acid
#4
What is the monomer unit of proteins?
Monosaccharide
Amino acid
Nucleotide
Fatty acid
#5
What is the primary function of triglycerides in organisms?
To provide insulation and regulate body temperature
To act as enzymes for metabolic reactions
To form the structural framework of cell membranes
To store energy for long-term use
#6
Which of the following is NOT a type of RNA?
#7
Which bond is responsible for holding together the primary structure of proteins?
Ionic bond
Hydrogen bond
Peptide bond
Disulfide bond
#8
In which cellular organelle does protein synthesis occur?
Nucleus
Endoplasmic reticulum
Golgi apparatus
Ribosome
#9
Which of the following is a characteristic of saturated fatty acids?
They contain double bonds between carbon atoms.
They are typically liquid at room temperature.
They have a higher melting point compared to unsaturated fatty acids.
They are commonly found in olive oil.
#10
What is the primary function of RNA polymerase?
To synthesize RNA from a DNA template
To synthesize DNA from an RNA template
To repair damaged DNA strands
To degrade RNA molecules
#11
What is the function of ATP in cellular processes?
To store genetic information
To act as a structural component of cell membranes
To provide energy for cellular activities
To facilitate protein synthesis
#12
Which of the following is a function of carbohydrates in living organisms?
To provide long-term energy storage
To form the structural components of cell membranes
To facilitate cellular communication
To catalyze biochemical reactions
#13
What is the primary function of DNA polymerase during DNA replication?
To unwind the double helix
To synthesize new DNA strands
To proofread newly synthesized DNA
To stabilize single-stranded DNA
#14
Which of the following is an example of a quaternary structure in proteins?
Alpha-helix
Beta-pleated sheet
Hemoglobin
Collagen
#15
What is the primary function of cholesterol in cell membranes?
To provide rigidity and structure
To enhance membrane fluidity
To prevent the entry of small molecules
To catalyze enzymatic reactions
#16
What is the role of DNA helicase during DNA replication?
It adds nucleotides to the new DNA strand.
It unwinds and separates the DNA double helix.
It proofreads the newly synthesized DNA strand.
It joins Okazaki fragments together.
#17
Which of the following is a characteristic feature of quaternary protein structure?
It involves the folding of a single polypeptide chain.
It is stabilized by disulfide bonds.
It is formed by the association of multiple polypeptide subunits.
It is primarily determined by the sequence of amino acids.