Chapter 3 Test Review

Water molecules stick to other _____ substances.

• non-polar

• chemical

• polar

• solid

The role of carbohydrates is to supply ____ to cells.

• rest

• energy

• blood

• protection

Enzymes _____the speed of biochemical reactions.

• pause

• decrease

• stop

• increase

RNA is largely _______ stranded.

• multi

• double

• single

• triple

Atoms are composed of protons, neutrons and _____.

• chemical bonds

• buffers

• electrons

• acids

Electrons of an atom are found _____the necleus.

• inside

• outside

A _____ is composed of only one type of atom.

• element

• compound

• molecule

• cell

Ionic bonds form between particles that have _____

• no charges.

• opposite charges.

• neutral charges.

• the same charges.

Which of the following are properties of water. (Choose all that apply)

• Water molecules stick to each other.

• Water absorbs and retains heat.

• Water cools rapidly.

• Frozen water (ice) floats.

Which of the following is not a biomolecule?

• ice

• lipid

• carbohydrate

• nucleic acid