Ch 2 Chemistry of Life

Which of the following organic compounds is the main source of energy for living things?

• Proteins

• Nucleic Acids

• Lipids

• Carbohydrates

Tags

NGSS.MS-LS1-7

A substance with a pH of 8 is called

• a base.

• an acid.

• both an acid and a base.

• neither an acid nor a base.

The three particles that make up an atom are

• protons, neutrons, and electrons.

• protons, neutrons, and isotopes.

• positives, negatives, and electrons.

• neutrons, isotopes, and electrons.

Tags

NGSS.MS-PS1-1

A monosaccharide is a

• nucleic acid.

• protein.

• lipid.

• carbohydrate.

A solution with a pH of 0 is considered to be a (an)

• acid.

• base.

• neutral substance.

• sugar.

A solution with a pH of 11 is

• a base.

• a neutral substance.

• an acid.

• none of the above.

What is the term used to describe the energy needed to get a reaction started?

• chemical energy

• cohesion energy

• adhesion energy

• activation energy

Tags

NGSS.HS-PS1-4

Which type of chemical bond involves the sharing of electrons?

• ionic bond

• carbon bond.

• covalent bond.

• hydrogen bond.

Which type of bond involves the transferring of electrons?

• ionic bond

• carbon bond

• covalent bond

• hydrogen bond

which of the following are the building blocks of proteins?

• monosaccharides

• amino acids

• peptides

• nucleotides

Tags

NGSS.HS-LS1-6