Chapter 2 - Homework Quiz

________ reactions release energy.

Catabolic, exergonic, and decomposition

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

amino

The smallest unit of an element that still retains the distinctive behavior of that element is an ________.

atom

What organic compound do brain cells primarily rely on for fuel?

glucose

A phospholipid ________.

has both polar and non polar regions

On the periodic table of the elements, mercury (Hg) has an atomic number of 80 and a mass number of 200.59. It has seven stable isotopes. The most abundant of these probably have ________.

more than 80 neutrons each

A pentose sugar is a part of the monomer used to build which type of macromolecule?

nucleic acids

CH4 is methane. This compound is ________.

organic

A molecule of ammonia contains one atom of nitrogen and three atoms of hydrogen. These are linked with ________.

polar covalent bonds

The characteristic that gives an element its distinctive properties is its number of ________.

protons

Chewing a bite of bread mixes it with saliva and facilitates its chemical breakdown. This is most likely due to the fact that ________.

saliva contains enzymes

A substance dissociates into K+ and Clâ " in solution. The substance is a(n) ________.

salt

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 distributed in water in a homogeneous 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

The bonding of calcium, phosphorus, and other elements produces mineral crystals that are found in bone. This is an example of a(n) ________ reaction.

synthesis

Nitrogen has an atomic number of seven. How many electron shells does it likely have?

two