In the first unit, we studied biological molecules. In this unit, we looked at how cells build and break down those molecules. Identify the organelle that carries out the function stated.

PFK is an enzyme that catalyzes a reaction early in glycolysis. When it catalyzes the reaction, it causes glycolysis to proceed. If the reaction is not catalyzed, the sugar is instead directed to pathways that convert the sugar to forms of energy that can be stored. PFK’s activity is regulated by cAMP. cAMP is present in cells when ATP levels are low. cAMP can bind to PFK and allosterically regulate its activity.  In order for a cell to maintain appropriate levels of ATP production, cAMP binding to PFK should cause the activity of PFK to ______.

Below is a diagram of a DNA molecule that is early in the process of replication.  The bottom strand is the original; the top shows the start of the new DNA strand. On the newly synthesized strand, the # represents the [a] end of the new DNA. The next nucleotide added to the DNA being synthesized would be [b]. The enzyme that adds a DNA nucleotide to an elongating strand of DNA is [c].

The carbon that makes up a plant’s biological molecules comes primarily from ________.

The Calvin cycle uses energy from the light reactions. What products of the light reaction provide energy to the Calvin cycle? Choose all correct answers.

A chemical makes plant thylakoid membranes permeable to hydrogen ions. How would this affect the plant’s ability to produce sugar by photosynthesis? This would [a], which would cause sugar production to [b].

Which of the following correctly states the function of a protein involved in DNA replication?

Which of the following is TRUE about intimate relationships?

During pregnancy, a woman could increase her folic acid intake by eating

What should the nurse explain to the parent of a child with exercise-induced asthma about when to inhale Cromolyn?