Units 1-3 Review

The following list represents characteristics of a living thing :

• made of cells, has lungs, can reproduce

• grows and develops, responds to surroundings, can move

• has similar chemicals, makes noises, made of cells

• made of cells, grows and develops, uses energy

A molecule that contains hereditary information.....

• carbohydrate

• protein

• Lipid

• Nucleic Acid

An organism made up of more than one cell would be called:

• multicellular

• unicellular

• heterotroph

• autotroph

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

Which of the following is LEAST likely to dissolve in water?

• nonpolar fats and oils
• polar sugar molecules
• salt made of a positive sodium ion and a negative chloride ion
• all of the substances will dissolve easily in water

The element _______is found in all of the organic compounds.

• Iron
• Nitrogen
• Carbon
• Oxygen

What are the building blocks of proteins?

• amino acid
• fatty acid
• nucleotide
• lipid

Where does the energy from our food originally come from?

• the Sun
• chemical reactions
• carbohydrates
• mitochondria

What is the primary function of carbohydrates in your body?

• Speed up chemical reactions.
• Give immediate energy.
• Help to store energy.
• Build cell walls in plants.