BIO 156 PRACTICE EXAMINATION 2026
QUESTIONS WITH ANSWERS
GUARANTEED TO PASS.
⩥ Explain how electron configuration influences the chemical
properties of an atom. Answer: Each cloud can hold a determinant
number of electrons. When the electron number changes, ions are
formed. The number of electrons influences the bonding between
atoms
⩥ hydrogen bond. Answer: weak attraction between a hydrogen atom
and another atom. Usually attracted to opposite charge to create bond
⩥ covalent bond. Answer: A chemical bond that involves sharing a
pair of electrons between atoms in a molecule
⩥ ionic bond. Answer: Formed when one or more electrons are
transferred/given up from one atom to another and become charged
⩥ Anion. Answer: A negatively charged ion
⩥ Cation. Answer: A positively charged ion
⩥ Describe how water contributes to the fitness of the environment
that supports life. Answer: Cells are mostly composed of water
Stabilizes temperature
, Acts as a good solvent
⩥ Explain the basis for the pH scale.. Answer: The basis for the pH
scale is the amount of H+ and OH- ions in a solution. More H+ ions
means a solution is more acidic, while more OH- ions means the
solution is more basic
⩥ Carbohydrates. Answer: Aka sugars, made of aldehyde and alcohol
functional group. 1 carbon : 2 hydrogen : 1 oxygen ratio
⩥ Lipids. Answer: Energy-rich organic compounds, such as fats, oils,
and waxes, that posses hydrocarbon functional group
⩥ Proteins. Answer: Chains of amino acids, has four different
dimensional structures which the function of protein depends on
shape
⩥ nucleic acids. Answer: Made up of nucleotides; contains a sugar,
nitrogen base, and one or more phosphate groups
⩥ Key features of the Cell theory. Answer: Cell is the basic structural
and functional unit of life
All living things are composed of cells
All cells come from pre-existing cells
Cells contain DNA which they pass to their offspring during cell
division
QUESTIONS WITH ANSWERS
GUARANTEED TO PASS.
⩥ Explain how electron configuration influences the chemical
properties of an atom. Answer: Each cloud can hold a determinant
number of electrons. When the electron number changes, ions are
formed. The number of electrons influences the bonding between
atoms
⩥ hydrogen bond. Answer: weak attraction between a hydrogen atom
and another atom. Usually attracted to opposite charge to create bond
⩥ covalent bond. Answer: A chemical bond that involves sharing a
pair of electrons between atoms in a molecule
⩥ ionic bond. Answer: Formed when one or more electrons are
transferred/given up from one atom to another and become charged
⩥ Anion. Answer: A negatively charged ion
⩥ Cation. Answer: A positively charged ion
⩥ Describe how water contributes to the fitness of the environment
that supports life. Answer: Cells are mostly composed of water
Stabilizes temperature
, Acts as a good solvent
⩥ Explain the basis for the pH scale.. Answer: The basis for the pH
scale is the amount of H+ and OH- ions in a solution. More H+ ions
means a solution is more acidic, while more OH- ions means the
solution is more basic
⩥ Carbohydrates. Answer: Aka sugars, made of aldehyde and alcohol
functional group. 1 carbon : 2 hydrogen : 1 oxygen ratio
⩥ Lipids. Answer: Energy-rich organic compounds, such as fats, oils,
and waxes, that posses hydrocarbon functional group
⩥ Proteins. Answer: Chains of amino acids, has four different
dimensional structures which the function of protein depends on
shape
⩥ nucleic acids. Answer: Made up of nucleotides; contains a sugar,
nitrogen base, and one or more phosphate groups
⩥ Key features of the Cell theory. Answer: Cell is the basic structural
and functional unit of life
All living things are composed of cells
All cells come from pre-existing cells
Cells contain DNA which they pass to their offspring during cell
division
