Ch 2

When an atom donates an electron to another atom, it becomes a. an ion b. an anion c. nonpolar d. all of the above

An ion

In which phase are the paired chromatids separating and being pulled to opposite ends of the cell?

Anaphase

During prophase, as the centrioles are migrating to opposite ends of the cell, their spindle fibers attach to what part of the chromatids?

Centromeres

The cell membrane is composed of numerous proteins, some of which allow for passage of material in and out of the cell. Which of the following proteins allow large molecules to pass through passively?

Channel

Which of the following is NOT a role of glycocalyces? A. Contain enzymes to break down nutrients B. Prevent donated organ rejection C. Contain molecules that allow the cell to bind to other cells D. Contain receptors for hormones

Contain molecules that allow the cell to bind to other cells

Which nitrogenous base found in DNA and RNA pairs with guanine?

Cytosine

Of these statements about chemical reactions, which one is FALSE? A. Gases tend to react quicker than liquids or solids. B. Smaller molecules with fewer bonds react slower than large molecules with more bonds. C. Some elements are more reactive than others. D. The higher the temperature, the faster the particles move.

Gases tend to react quicker than liquids or solids.

A saturated fatty acid has the maximum number of which atoms in its chain?

Hydrogen

Since muscle cells make and utilize an abundance of ATP (energy) for muscle activity, which of these does each muscle cell most likely have more of?

Mitochondria

Which of the following is a function of the rough ER?

Production of proteins

Which of the following structures could be found within the nucleolus?

Ribosomes

Which of the following is a dissacharide? A. Fructose B. Glucose C. Ribose D. Sucrose

Sucrose

What does the phospholipid bilayer consist of?

Two adjacent sheets of phospholipids

Which of these is not one of the fundamental chemical reactions? A. Decomposition B. Exchange C. Synthesis D. Yield

Yield

Together, just four elements make up more than 95 percent of the body's mass. These include ________. a. calcium, magnesium, iron, and carbon b. oxygen, calcium, iron, and nitrogen c. sodium, chlorine, carbon, and hydrogen d. oxygen, carbon, hydrogen, and nitrogen

oxygen, carbon, hydrogen, and nitrogen

The energy stored in a foot of snow on a steep roof is ________. a. potential energy b. kinetic energy c. radiant energy d. activation energy

potential energy

The characteristic that gives an element its distinctive properties is its number of ________. a. protons b. neutrons c. electrons d. atoms

protons

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. What is the chocolate chip batter an example of?

suspension

Nitrogen has an atomic number of seven. How many electron shells does it likely have? a. one b. two c. three d. four

two