Chapter 2 Chem. of Life Review

Which two subatomic particles are equal numbers in a neutral atom, but not in an ion (ion is an atom with a charge)? Mark only one oval.

• protons and electrons

• protons and neutrons

• inner-shell electrons and outer-shell electrons

• protons and inner-shell electrons

Household bleach has a pH between 12 and 13. From this information, which of the following BEST describes the bleach solution? Mark only one oval.

• The solution is acidic

• The solution is basic

• The solution is neutral

• none of the above are correct

In a chemical reaction, which event ALWAYS occurs as the reaction proceeds?

• the rearrangement of electrons to break or form chemical bonds

• the release of energy to the environment

• the absorption of energy from the environment

• a change in total mass

What is the effect of an enzyme on the energy of a chemical reaction?

• Enzymes increase the free energy of the products.

• Enzymes decrease the free energy of the reactants.

• Enzymes decrease the difference in energy between products and reactants.

• Enzymes decrease the activation energy of the reaction.

Which type of macromolecule has the function of storing and transmitting hereditary or genetic information?

• lipid

• protein

• nucleic acid

• carbohydrate

What is the monomer for carbohydrates?

• glycerol

• monosaccharide

• nucleotide

• all of the above

What is the arrow pointing to in the picture below?

• a positively charged proton

• a negatively charged electron

• a negatively charged proton

• a radioactive isotope

What characteristic of water is shown in the picture below?

• adhesion

• cohesion

• high specific heat

• both A and B

How many protons are in Iron (Fe)?

• 55

• 55.8

• 26

• 29

How many neutrons are in Carbon-14?

• 5

• 6

• 7

• 8