I use an affinity column to purify a protein, “X” from cell lysate. The specific activity of the protein is very low after this step. So I run the affinity-purified sample through an anion exchanger, and collect the early fraction. This eluate has very high specific activity. My results from […]

(a) L1 is a slide of a stained transverse section through a plant stem. This plant species is a native of Europe and parts of Asia. You are not expected to be familiar with this specimen. (b) Draw a large plan diagram of the quarter of the stem, as shown […]

5. Action potentials normally travel along an axon in either direction depending on the needs of the animal. )        True        False    Question 6.6. The thalamus relays information to the body.)        True        False    Question 7.7. The resting membrane allows much more potassium than sodium to diffuse across so that the concentration of potassium inside […]

Before this module evaluation you were very nervous.  Thinking a snack might help, you ate a large bowl of pasta and some bread (high carbohydrate) a couple of hourse before you started this quiz..  Right about now the carbohydrates (glucose) has been oxidized to [1] (Compound) in the mitochodria.  This compound (from the previous blank) […]