MCQ
Among the following, $L-$ serine is
- A

- B

- ✓

- D






serine is (figure)
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The structure of Major Product will be
Reason : Addition of $HBr$ on $2-$ butene follows Markovnikov rule.
$(A)$ Sulphanilic acid $(B)$ Picric acid $(C)$ Aspirin $(D)$ Ascorbic acid
If the absolute values of the net charge of the peptide at $pH =2, pH =6$, and $pH =11$ are $\left| z _1\right|,\left| z _2\right|$ and $\left|z_3\right|$, respectively, then what is $\left|z_1\right|+\left|z_2\right|+\left|z_3\right|$ ?