Chemistry of Life Pre-Test

The electrons of an atom

• are found in the nucleus along with the protons.

• occupy the space surrounding the nucleus.

• have a positive charge.

• are attracted to the positive charge of neutrons.

All matter is composed of

• Cells

• Oxygen

• atoms

• Carbon

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Phosphorous has an atomic number of 15 and an atomic mass of 31. Which of the following is true?

• Phosphorous has 15 neutrons.

• Phosphorous has 15 protons.

• Phosphorous has 31 neutrons.

• Phosphorous has 46 protons.

Which of the following is not a macromolecule?

• ice

• carbohydrate

• lipid

• protein

• These are all macromolecules.

Atoms of the same element that have a different number of neutrons are called

• molecules.

• lipids.

• polar.

• isotopes.

The 2 types of nucleic acids are

• Catalase and lactase

• DNA and RNA

• Lipids and sugars

• Glucose and glycogen

When an electron is transferred from one atom to another, this forms a(n)

• Ionic bond

• Hydrogen bond

• Covalent bond

• Polar molecule

Which of the following bonds is the weakest?

• covalent

• ionic

• hydrogen

• polar

Tags

NGSS.HS-PS1-3

The molecule that is formed at the end of a chemical reaction using an enzyme is called a(n)

• product

• substrate

• active site

• inhibitor

The oxygen side of a water molecule is slightly attracted to the hydrogen side of another water molecule. This is caused by water's ________ and causes water to _________.

• capillary action; divide into hydrogen and hydroxide ions

• acidity; creep up thin tubes

• adhesion; neutralize bases

• polarity; form hydrogen bonds