Two directly transmitted viral disease have the same basic reproduction number (r0), even though their dynamics are different. Which of the following differences between the two diseases could lead to the same basic reproduction number? a. One disease has a higher transmission rate and a longer recovery period than the other.
b. One disease has a lower transmission rate and a longer recovery period than the other.
c. One disease has a lower transmission rate and a shorter recovery period than the other.
d. For one disease, the recovery period is long; for the other, no one recovers.

Explanation:

An allosteric enzyme is one in which the activity of the enzyme can be controlled by the biniding of a molecule to the "allosteric site". This really just means somewhere other than the active site. Thus allosteric control of an enzyme can be classed in two ways. A positive allosteric modification is the binding of a molecule to the enzyme which increase the rate of reaction. Sort of like catalysing the catalysing effect of an enzyme. Obviously the opposite is true of negative allosteric modification. A good example for this is the activity of phosphofructokinase, which is promoted by a high AMP concentration, and inhibited by a high ATP concentration. This should make sense if you think about the action of a kinase etc.

(◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕) (◕ᴥ◕)