Ch. 2 The Chemistry of Life Review Quiz

If an atom contains 11 protons and 12 neutrons, its atomic number is

• 1

• 11

• 12

• 23

A covalent bond is formed as the result of

• transferring electrons

• sharing electrons

• transferring protons

• sharing protons

An ionic bond is formed as the result of

• transferring electrons

• sharing electrons

• transferring protons

• sharing protons

Water molecules are polar, with the

• oxygen being slightly positive and the hydrogen being slightly negative

• oxygen and hydrogen sides being slightly positive

• oxygen and hydrogen sides being slightly negative

• oxygen being slightly negative and the hydrogen being slightly positive

A substance with a pH of 6 is called

• an acid

• a base

• water

• a suspension

Solutions that have more OH- than H+ ions are

• reactants

• acids

• bases

• enzymes

Amino acid is to protein as

• fat is to lipid

• DNA is to RNA

• sugar is to fat

• monosaccharide is to carbohydrates

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Which of the following statements about enzymes is NOT true?

• Enzymes work best at a specific pH.

• All enzymes have the same shape as their substrates.

• Enzymes are proteins.

• The shape of an enzyme allows it to do its job.

Which of the following is NOT an organic molecules found in living organisms?

• Protein

• Nucleic Acid

• Sodium Chloride

• Lipid

In which of the following ways to isotopes of the same element differ?

• in number of neutrons only

• in number of protons only

• in numbers of neutrons and protons

• in numbers of neutrons and in mass