AC HPAT BIOLOGY PRACTICE EXAMINATION
2026 QUESTIONS AND CORRECT ANSWERS
GRADED A+
◉ passive transport. Answer: Requires NO energy, movement of
molecules from high to low concentration, moves with the concentration
gradient
◉ covalent bond. Answer: A chemical bond that involves sharing a pair
of electrons between atoms in a molecule
◉ ionic bond. Answer: Linkage formed from the electrostatic attraction
between oppositely charged ions in a chemical compound. Such a bond
forms when the valence (outermost) electrons of one atom are
transferred permanently to another atom.
◉ allosteric bond. Answer: The regulation of an enzyme by binding an
effector molecule at a site other than the enzyme's active site.
◉ Substrate. Answer: reactant of an enzyme-catalyzed reaction
◉ substrate-enzyme complex. Answer: The substrate connects to the
enzyme to perform chemical reactions. It connects to the enzyme at the
active site.
, ◉ substrate enzyme inhibition. Answer: the substrate or product of an
enzyme reaction inhibit the enzyme's activity.
◉ Carbohydrates. Answer: Are sugar molecules- our body breaks down
carbohydrates into glucose. Glucose, or blood sugar, is the main source
of energy for your body's cells, tissues, and organs.
◉ Proteins. Answer: Chains of amino acids
◉ Lipids. Answer: Energy-rich organic compounds, such as fats, oils,
and waxes, that are made of carbon, hydrogen, and oxygen.
◉ nucleic acids. Answer: Nucleic acids are naturally occurring chemical
compounds that serve as the primary information-carrying molecules in
cells. The two main classes of nucleic acids are deoxyribonucleic acid
(DNA) and ribonucleic acid (RNA).
◉ Lysosomes. Answer: An organelle containing digestive enzymes
◉ Vacuole. Answer: Cell organelle that stores materials such as water,
salts, proteins, and carbohydrates
2026 QUESTIONS AND CORRECT ANSWERS
GRADED A+
◉ passive transport. Answer: Requires NO energy, movement of
molecules from high to low concentration, moves with the concentration
gradient
◉ covalent bond. Answer: A chemical bond that involves sharing a pair
of electrons between atoms in a molecule
◉ ionic bond. Answer: Linkage formed from the electrostatic attraction
between oppositely charged ions in a chemical compound. Such a bond
forms when the valence (outermost) electrons of one atom are
transferred permanently to another atom.
◉ allosteric bond. Answer: The regulation of an enzyme by binding an
effector molecule at a site other than the enzyme's active site.
◉ Substrate. Answer: reactant of an enzyme-catalyzed reaction
◉ substrate-enzyme complex. Answer: The substrate connects to the
enzyme to perform chemical reactions. It connects to the enzyme at the
active site.
, ◉ substrate enzyme inhibition. Answer: the substrate or product of an
enzyme reaction inhibit the enzyme's activity.
◉ Carbohydrates. Answer: Are sugar molecules- our body breaks down
carbohydrates into glucose. Glucose, or blood sugar, is the main source
of energy for your body's cells, tissues, and organs.
◉ Proteins. Answer: Chains of amino acids
◉ Lipids. Answer: Energy-rich organic compounds, such as fats, oils,
and waxes, that are made of carbon, hydrogen, and oxygen.
◉ nucleic acids. Answer: Nucleic acids are naturally occurring chemical
compounds that serve as the primary information-carrying molecules in
cells. The two main classes of nucleic acids are deoxyribonucleic acid
(DNA) and ribonucleic acid (RNA).
◉ Lysosomes. Answer: An organelle containing digestive enzymes
◉ Vacuole. Answer: Cell organelle that stores materials such as water,
salts, proteins, and carbohydrates
