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