What is an allele? 

Variations in the reactive properties of different organic molecules are most closely associated with _____.

Sometimes when I have my morning coffee, which I drink black with no cream or sugar, I notice a thin film floating on top of the coffee. Since I have learned biology, I now realize the nature of this substance and so I run to my friend screaming, “Look at this ________ in my coffee!”

The process by which white blood cells engulf bacteria is known as: 

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by:

Which enzyme catalyzes the elongation of a new DNA strand in the 5′ → 3′ direction?

When light strikes chlorophyll molecules, they lose electrons, which are ultimately replaced by _____. 

The products of mitosis are _________________.

Which of the following processes occurs when termination of translation takes place?

Density-dependent inhibition is explained by which of the following processes?