Blog

The burning of methane (the chemical reaction shown below) is a spontaneous reaction. Nonetheless, when methane is exposed to oxygen, water and carbon dioxide are not always quickly formed. What is the most likely explanation for why this is the case?

The transfer of phosphates from ATP and the transfer of electrons in redox reactions are both important in biological systems because:

All of the stages of cell respiration make NADH by adding electrons to NAD+, except:

Humans cannot survive more than about 5 or so minutes without permanent damage if all of their cells are doing fermentation rather than regular cellular respiration. Why does it make sense that fermentation alone is not sufficient to keep most of your cells alive?

NADPH and ATP are two molecules produced during the light-capturing reactions of photosynthesis. What are these molecules used for later in photosynthesis in the Calvin cycle?

During glycolysis, the ATP molecules that are produced are made via:

Based on the equation

You are a scientist researching chemicals that affect corn plants. Among the chemicals that you have tested on your corn plants is one that, once applied to a plant, causes it to lose all of its chlorophyll, stop photosynthesizing, and eventually die. With a little more research, you are able to determine that its mode of action is to halt the production of carotenoids in the plant. (3 pts) a) Why are carotenoids important in plants?  b) Why would losing carotenoids cause the issues listed above? 

In a properly-wired 110-120-volt polarized and grounded household outlet, what is the shape of the grounded slot (neutral)?

Assuming correct color-coding of the wires, which outlet is wired correctly in the image?