C190 WGU BIOLOGY PRACTICE TEST 2026
QUESTIONS WITH CORRECT ANSWERS
◉ Ionic bond. Answer: Moderately strong chemical bond. Occurs
between atoms in the same molecule. Electrons transfer from one
atom to another.
◉ Isotope. Answer: Any or two or more forms of a chemical element,
having the same number of protons in the nucleus, or the same
atomic number, but having different numbers of neutrons in the
nucleus, or different atomic weights.
◉ Matter. Answer: Anything that occupies space and has mass.
◉ molecular formula. Answer: A formula giving the number of atoms
of each of the elements present in one molecule of a specific
compound.
◉ neutron. Answer: Subatomic particle, electrically neutral, located
in the nucleus. Mass of one amu.
◉ nucleus. Answer: Center of the atom. Contains equal number of
protons and neutrons.
,◉ Periodic Table. Answer: Chart organizing elements by atomic
number and weight.
◉ proton. Answer: Subatomic particle, located in the nucleus, with a
positive charge. Mass of one amu.
◉ valence electron. Answer: Electrons on the outermost shell of the
atom. Involved in chemical bonds.
◉ Adhesion. Answer: The attraction between water molecules and
other molecules.
◉ Cohesion. Answer: Water molecules are attracted to each other,
keeping the molecules together.
◉ Hydrophilic. Answer: Substances that will dissolve in water. Polar.
They split into positive and negative ions and dissolve in water.
Examples: sugars and alcohols.
◉ Hydrophobic. Answer: Substances that do not dissolve in water.
Non-polar. Examples: hydrocarbons and fatty acids.
◉ Surface Tension. Answer: The capacity of a liquid's surface to
resist being ruptured when placed under tension or stress.
,◉ Solute. Answer: The component(s) present in lower quantities.
◉ Solution. Answer: Homogeneous mixtures, with 2 components:
solvent and solutes.
◉ Solvent. Answer: The component of the solution in the greatest
quantity.
◉ Carbohydrate. Answer: Biological macromolecule. Sugars.
Essential for energy storage, cellular communication and structural
support.
◉ Chemical potential energy. Answer: The energy stored in the
chemical bonds of a substance.
◉ inorganic molecule. Answer: Molecules like water, oxygen gas,
carbon dioxide, and ionic salts. Relatively stable, simple, and store
little chemical energy.
◉ lipid. Answer: Biological macromolecules. Fatty acids. Essential
for energy storage and maintaining a boundary between the living
organism and its environment.
, ◉ nucleic acid. Answer: Biological macromolecules. Nucleotides.
Essential for information storage within a cell and passing on this
information to the next generation. Examples: DNA.
◉ organic molecule. Answer: Any molecule that contains a carbon to
hydrogen covalent bond. Often complex and many store a lot of
chemical potential energy.
◉ protein. Answer: Biological macromolecules. Amino acids.
Essential for carrying out most of the necessary functions of life.
◉ Dietary Fiber. Answer: Indigestible carbohydrates, which cannot
be degraded by human digestive enzymes.
◉ Disaccharide. Answer: 2 sugar subunits. Lactose: dairy products.
Sucrose: 'Table sugar', sugarcane, sugar beets, candy. Maltose:
germinating seeds, beer.
◉ Glycogen. Answer: Polysaccharide. Mainly used for energy storage
in animals.
◉ Monosaccharide. Answer: Simple sugars. 1 sugar subunit.
Glucose: many plants and fruits, honey, sports drinks. Fructose: fruit,
honey, sweetener in many processed foods.
QUESTIONS WITH CORRECT ANSWERS
◉ Ionic bond. Answer: Moderately strong chemical bond. Occurs
between atoms in the same molecule. Electrons transfer from one
atom to another.
◉ Isotope. Answer: Any or two or more forms of a chemical element,
having the same number of protons in the nucleus, or the same
atomic number, but having different numbers of neutrons in the
nucleus, or different atomic weights.
◉ Matter. Answer: Anything that occupies space and has mass.
◉ molecular formula. Answer: A formula giving the number of atoms
of each of the elements present in one molecule of a specific
compound.
◉ neutron. Answer: Subatomic particle, electrically neutral, located
in the nucleus. Mass of one amu.
◉ nucleus. Answer: Center of the atom. Contains equal number of
protons and neutrons.
,◉ Periodic Table. Answer: Chart organizing elements by atomic
number and weight.
◉ proton. Answer: Subatomic particle, located in the nucleus, with a
positive charge. Mass of one amu.
◉ valence electron. Answer: Electrons on the outermost shell of the
atom. Involved in chemical bonds.
◉ Adhesion. Answer: The attraction between water molecules and
other molecules.
◉ Cohesion. Answer: Water molecules are attracted to each other,
keeping the molecules together.
◉ Hydrophilic. Answer: Substances that will dissolve in water. Polar.
They split into positive and negative ions and dissolve in water.
Examples: sugars and alcohols.
◉ Hydrophobic. Answer: Substances that do not dissolve in water.
Non-polar. Examples: hydrocarbons and fatty acids.
◉ Surface Tension. Answer: The capacity of a liquid's surface to
resist being ruptured when placed under tension or stress.
,◉ Solute. Answer: The component(s) present in lower quantities.
◉ Solution. Answer: Homogeneous mixtures, with 2 components:
solvent and solutes.
◉ Solvent. Answer: The component of the solution in the greatest
quantity.
◉ Carbohydrate. Answer: Biological macromolecule. Sugars.
Essential for energy storage, cellular communication and structural
support.
◉ Chemical potential energy. Answer: The energy stored in the
chemical bonds of a substance.
◉ inorganic molecule. Answer: Molecules like water, oxygen gas,
carbon dioxide, and ionic salts. Relatively stable, simple, and store
little chemical energy.
◉ lipid. Answer: Biological macromolecules. Fatty acids. Essential
for energy storage and maintaining a boundary between the living
organism and its environment.
, ◉ nucleic acid. Answer: Biological macromolecules. Nucleotides.
Essential for information storage within a cell and passing on this
information to the next generation. Examples: DNA.
◉ organic molecule. Answer: Any molecule that contains a carbon to
hydrogen covalent bond. Often complex and many store a lot of
chemical potential energy.
◉ protein. Answer: Biological macromolecules. Amino acids.
Essential for carrying out most of the necessary functions of life.
◉ Dietary Fiber. Answer: Indigestible carbohydrates, which cannot
be degraded by human digestive enzymes.
◉ Disaccharide. Answer: 2 sugar subunits. Lactose: dairy products.
Sucrose: 'Table sugar', sugarcane, sugar beets, candy. Maltose:
germinating seeds, beer.
◉ Glycogen. Answer: Polysaccharide. Mainly used for energy storage
in animals.
◉ Monosaccharide. Answer: Simple sugars. 1 sugar subunit.
Glucose: many plants and fruits, honey, sports drinks. Fructose: fruit,
honey, sweetener in many processed foods.
