#1
Which element is the primary building block of organic molecules?
Hydrogen
Oxygen
Carbon
Nitrogen
#2
Which type of macromolecule is primarily responsible for energy storage in living organisms?
Proteins
Carbohydrates
Lipids
Nucleic acids
#3
Which of the following macromolecules is a polymer of nucleotides?
Protein
Carbohydrate
Lipid
Nucleic acid
#4
Which of the following is not a function of lipids in living organisms?
Energy storage
Cellular structure
Hormone production
Insulation
#5
Which of the following is a characteristic feature of saturated fatty acids?
They contain double bonds between carbon atoms.
They are typically liquid at room temperature.
They have a straight chain structure.
They are found primarily in plant oils.
#6
Which of the following is a function of RNA?
Storing genetic information
Providing structural support
Acting as an enzyme
Transferring genetic information from DNA to ribosomes
#7
What is the main function of enzymes in biological systems?
Transporting molecules
Storing genetic information
Speeding up chemical reactions
Providing structural support
#8
Which of the following is not a type of carbohydrate?
Glucose
Starch
Cholesterol
Cellulose
#9
What is the monomer unit of proteins?
Nucleotide
Amino acid
Monosaccharide
Fatty acid
#10
Which of the following is a polysaccharide?
Glucose
Sucrose
Starch
Fructose
#11
Which of the following is a structural carbohydrate found in the cell walls of plants?
Glucose
Fructose
Cellulose
Glycogen
#12
What is the primary function of ATP (adenosine triphosphate) in cells?
Energy storage
Storing genetic information
Providing structural support
Facilitating enzyme reactions
#13
What is the primary structure of proteins determined by?
The sequence of amino acids
The arrangement of secondary structures
The interaction between different polypeptide chains
The presence of disulfide bonds
#14
What is the primary function of DNA in cells?
Energy storage
Catalyzing chemical reactions
Storing genetic information
Providing structural support
#15
Which of the following is not a type of protein structure?
Primary
Secondary
Tertiary
Quaternary
#16
Which of the following is not a component of a nucleotide?
Phosphate group
Deoxyribose sugar
Nitrogenous base
Amino group
#17
Which of the following is a function of nucleic acids in living organisms?
Energy storage
Catalyzing chemical reactions
Storing and transmitting genetic information
Providing structural support