Ch. 6 Chem in Bio

How many different kinds of atoms does an element contain?

• six
• two 
• four 
• one

Atoms of the same element that have different numbers of neutrons are called ____.

• isotopes
• compounds
• neutrino elements
• molecules

When added to water, how does an acid affect the pH and H+ concentration?

• Both pH and H+ decrease
• Bot pH and H+ increase
• The pH decreases while the H+ increases
• The pH increases while the H+ decreases

Glycogen, used to store energy in the liver and muscle tissue, is an example of which type of molecule?

• Carbohydrate
• Protein
• Saturated fatty acid
• Steroid

In which type of bond are electrons shared

• Covalent
• Ionic

Water is a ____________ molecule, meaning that it has ___________ sharing of electrons

• polar, unequal
• nonpolar, unequal
• polar, equal
• nonpolar, equal

What principle can be applied to all chemical reactions?

• Conservation of mass
• Reactants formed by products
• Energy loss theory
• Coefficient principle

The minimum amount of energy needed for a chemical reaction is called ____.

• product threshold
• absorbent energy
• principle mass
• activation energy

How can enzymes benefit chemical reactions, as shown in this energy diagram?

• lowering activation energy
• raising activation energy
• slowing reactions
• increasing the amount of product

Acid solutions are produced by the release of ____ ions.

• potassium
• hydrogen
• oxygen
• sodium