Chemistry of Life

What are the smallest basic units of matter?

• molecules

• atoms

• elements

• 7th graders

When is an ionic bond formed?

• when electrons are shared

• when protons are shared

• when oppositely charged atoms gain or lose electrons

• when oppositely charged atoms gain or lose a proton

What gives water so many important properties for life?

• adhesion and cohesion

• the amount of carbon in each molecule

• energy released exothermically

• hydrogen bonds give it polarity

Enzymes act on

• products

• proteins

• amino acids

• substrates

Atoms that share electrons are

• in a covalent bond

• in an ionic bond

• are usually salts

• always metals

What are the 4 types of carbon-based molecules in organisms?

• carbohydrates, lipids, fatty acids, and monomers

• polymers, monomers, acids, bases

• adhesion, cohesion, evaporative cooling, and high specific heat

• nucleic acids, proteins, lipids, and carbohydrates

What are proteins made of?

• amino acids

• monosaccharides

• nucleic acids

• fatty acids

Which carbon-based molecule includes sugar and starches?

• carbohydrates

• lipids

• proteins

• nucleic acids

What is the primary function of DNA?

• to make nucleic acids

• long term energy storage

• store genetic information

• to function as RNA

All living things are made of________.

• Atoms

• chemicals

• lipids

• Ionic bonds.