Pigmented epithelium is found in the choroid layer of the eyes.

The graph below depicts the velocity of an enzyme-catalyzed reaction vs. substrate concentration. Identify the alphabets with the correct descriptions.

I. $\mathrm{A}=$ Enzyme activity

II. $\mathrm{B}=$ Substrate concentration at maximum velocity

III. $\mathrm{A}=$ Substrate concentration at which half of the maximum velocity

IV. $\mathrm{B}=$ Half of the maximum velocity

Match list - I with the list - II.

Choose the correct answer from the options given below:

Statement I : Tendons attach one bone with another bone.
Statement II : Epiglottis is formed by elastic cartilage.

The correct option among the following is

The graph given below shows the Michaelis-Menten kinetics for two reactions ($R_1$ and $R_2$; represented as solid and dotted lines, respectively). Enzymes $E_1$ and $E_2$ have $V_{\max }$ values, $V_{\max 1}$ and $V_{\max 2}$, respectively. The respective $K_M$ values for $E_1$ and $E_2$ are $K_{M1}$ and $K_{M2}$. ($K_{M1}=K_{M2}$).

The correct statement(s) for reactions $R_1$ and $R_2$ is/are