Biomolecules and Chemistry of Life

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 makes carbon so important to life?

• bonding properties

• its place on the Periodic Table

• it is a reactant in all chemical reactions

• it is an enzyme

What are the smallest basic units of matter?

• molecules

• atoms

• elements

• 7th graders

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

The building blocks of most living things contain the element

• carbon

• nitrogen

• calcium

• sodium

Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?

• Water expands as it freezes

• Water is an excellent solvent

• Water exhibits cohesive behavior

• Water is able to moderate temperature