Biology Test 5: The Chemistry of Life CH 2

Atoms in molecules loose or gain electrons when they make _____.

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Peptide bonds

Atoms in molecules share pairs of electrons when they make _____.

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Peptide bonds

A solution is made combining a solvent and a solute. Which has more volume?

• The solvent

• The solute

Which substance represented in the figure (A or B) is the solvent?

• A

• B

The ability of water molecules to stick to each other is called _____, and the ability of water molecules to stick to the other surfaces is called _____.

• cohesion; adhesion

• adhesion;adhesion

• adhesion;cohesion

• cohesion; cohesion

Tags

NGSS.HS-ESS2-5

The four main types of carbon-based molecules in organisms are

• carbohydrates, lipids, proteins, nucleic acids

• carbohydrates, fatty acids, proteins, nucleic acids

• glucose, fatty acids, amino acids, nucleic acids

• none of the above

A polar molecule likes a polar molecule because charges attract, then a non-polar molecule likes a _______________

• non-polar molecule because there is no charges

• a polar molecule because there is no charges

When you mix water and oil, they separate. Why?

• because water is polar and oil is nonpolar.

• because water is polar and oil is polar

• because water is nonpolar and oil is polar

The smallest basic unit of matter is the _____.

• cell

• atom

• molecule

• compound

Tags

NGSS.HS-PS1-1

a protein is denatured (looses function) when:

• the pH or temperature is altered.

• chemically reacted

• catalyzed

• it is an enzyme