Question

Question #c96f9

Answer 1

Well, before answering the question, it's always useful to actually look at a Michaelis-Menten plot

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The plot describes the rate of a catalyzed reaction, `v`, as a function of the concentration of the substrate, or `[S]`.

So, starting with the first option

• A straight line connecting the points

This is clearly not correct, since the plot actually uses a curve to connect the points.

• x-axis label of concentration units

As you can see, this is correct, the x-axis does indeed feature concentration units; more precisely, the x-axis of a Michaelis-Menten plot represents the concentration of the substrate, or `[S]`.

• Points of initial velocity measured at `[S]` concentration

This one is correct as well, since various substrate concentration will have corresponding initial velocities on the y-axis of the plot.

• A value of `K_m` half up the y-axis

I'm not sure about the wording on this one. `K_m` is not on the y-axis, but its x-axis value does correspond to a value half way up the y-axis.

So, if the question implies that `K_m` is half way on the y-axis, then it is incorrect. If it implies that `K_m` corresponds to a value located half way up the y-axis, then it is correct.

In this case, it would correspond to `V_"max"/2`, which is indeed half way between `V_"max"` and `0` on the y-axis.