A&P Quiz #1 (Chapter 2)

Which of the following is a functional group that is part of a building block of protein?

Amino

__________ reactions release energy.

Catabolic, exergonic, and decomposition

Which of the following statements about chemical bonds is true?

Covalent bonds are stronger than iconic bonds

AB -> A + B is a general notation for a(n) __________ reaction.

Decomposition

C6H12O6 is the chemical formula for a ________.

Hexose monosaccharide

AB + CD -> AD + BE. Is this a legitimate example of an exchange reaction? Why or why not?

It is not. An exchange reaction might be AB + CD --> AC + BD or AB + CD --> AD + BC. In all chemical reactions, including change reactions, the components of the reactions are identical to the components of the products. A component present among the reactants cannot disappear nor can a component not present in the reactants suddenly appear in the products.

CH4 is methane. This compound is _________.

Organic

Together, just four elements make up more than 95 percent of the body's mass. These include _________.

Oxygen, carbon, hydrogen, and nitrogen

A substance formed of crystals of equal numbers of cations and anions held together by ionic bonds is called a(n) _________.

Salt

Which of the following is most likely to be found evenly disturbed in water in a homogenous solution?

Sodium ions and chloride ions

Jenny mixes up a batch of pancake batter, then stirs in some chocolate chips. As she is waiting for the first few pancakes to cook, she notices the chocolate chips sinking to the bottom of the clear glass mixing bowl. The chocolate-chip batter is an example of a _________.

Suspension

In a hurry one day, you rely rinse your lunch dishes with water. As you are drying your salad bowl, you notice that it still has an oily film. Why was the water alone not effective in cleaning the bowl?

Water is a polar molecule. It has a region of weakly positive charge and a region of weakly negative charge. These regions are attracted to ions as well as to other polar molecules. Oils are non polar, and are repelled by water.