Problem:

Question 1: Nuclear pores are most similar to which of the following?

a)Gap junctions

b)Desmosomes

c)microtubules

d)Tight junctions

e)Ion channels

Question 2: If the 4th enzyme of an enzymatic pathway is inhibited by the end product of the pathway, which of

the following is most likely true?

a) The end product of the pathway binds the enzyme reversibly.

b) This particular pathway has five enzymatic steps in total.

c) The enzyme catalyzes an exergonic reaction.

d) The enzyme does not undergo a conformational change upon binding the end product.

e) a) and b)

Give reasoning with your answer.