Chemistry of Life

The following elements are all essential for life except

• carbon
• helium
• oxygen
• nitrogen

Enzymes affect the reactions in living cells by changing the

• products of the reaction
• speed of the reaction
• temperature of the reaction
• pH of the reaction

Tags

NGSS.HS-PS1-5

A substance that accelerates the rate of a chemical reaction is called a(an)

• lipid
• molecule
• element
• catalyst

Tags

NGSS.HS-PS1-5

A substance with the pH of 4 is called

• an acid

• base

• both

• neither

When salt is dissolved in water, water is the 

• Reactant
• Solution
• Solvent
• Solute

All of the following are examples of lipids except

• oil

• fats

• candle wax

• starches

Examples of nucleic acids?

• DNA and RNA
• carbohydrates
• potatoes
• meats

The basic unit of any molecule; The six common _________ that are necessary for life are SPONCH.

• Elements

• Monomers

• Polymers

• Compounds

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

Tags

NGSS.HS-ESS2-5

What is the building block of a polymer?

• monomer

• polypeptide

• monosaccharide

• glycerol