BSC2023 quizzes
What sort of bond exists within a water molecule?
Polar covalent bond
Substances that donate hydrogen ions (protons) to a solution are called
acids
Glycogen is a polysaccharide used for energy storage by
animals
The smallest particle of an element that has the chemical characteristics of that element is a(n)
atom
The atom diagnostically associated with organic compounds is
carbon
A solution with a pH of 4 would have _____ hydrogen ions than a solution with a pH of
100 times more
Atom Y has 11 protons, 11 electrons, and 12 neutrons. What is the mass number of Atom Y?
23
True of False: A substance that releases hydrogen ions in water is a base.
False
___________ are a common fuel nutrient that has triglyceride as a storage form
Lipids
A molecule is
a combination of two or more atoms
Cellulose is
a material found in cell walls.
If a molecule consists of two or more different kinds of atoms, it is a(n)
compound
When atoms combine with other atoms, interactions occur between their __________. (one word)
electrons
A hydrogen bond is
formed when an electronegative atom of a molecule weakly interacts with a hydrogen atom that is already participating in a separate polar covalent bond meaning the bond is the result of a weak electrical attraction between the positive end of one molecule and the negative end of another
Polyunsaturated fats
have fewer hydrogen atoms than do saturated fats
This attractive force, referred to as a type of chemical bond, contributes to the shape of large molecules.
hydrogen
Two atoms with the same number of protons and electrons, but different numbers of neutrons, are called
isotopes
Oils are
liquid at room temperature
The amount of matter in an object is its
mass
The atoms of the isotopes of a particular element vary in the number of:
neutrons
The macromolecules that function as the genetic material and are involved in protein synthesis are
nucleic acids
What is the role of oxygen in water?
oxygen contributes to water solubility in molecules
The difference in hydrogen ion concentration between solutions with pH 7 and pH 5 is
pH5 has 100 times more hydrogen ions than pH7
Plants store their excess carbohydrates in the form of
starch
