Mid-Unit Biology Quiz

_{What particle is found in the nucleus and has no charge?}

• electron
• neutron
• proton
• atom

What are the smallest basic units of matter?

• molecules

• atoms

• elements

• 10th 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

The ability of water molecules to stick together is called:

• Adhesion

• Cohesion

• Transpiration

• Solvency

A slight attraction between oppositely charged regions of nearby molecules are called:

• Van Der Waals forces
• ionic bonds
• covalent bonds
• hydrogen bonds

Atoms that share electrons are

• in a covalent bond

• in an ionic bond

• are usually salts

• always metals

Why does water move from the roots to the leaves of plants?

• Water is pushed by solutes

• Water is pulled by gravity

• Capillary action pulls the water molecules like a chain

• Water's cohesion causes it to "pull" towards the leaves

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

A substance of a pH of 7 would be

• neutral

• positive

• acid

• base

What are proteins made of?

• amino acids

• monosaccharides

• nucleic acids

• fatty acids