Which of the following amino acids does not contain an asymmetric carbon?

The general structure of $\alpha$-amino acid can be represented as shown below. Which amino acid is not correctly matched with the $R$ group given?

In the given pentapeptide,find out an essential amino acid $(Y)$ and the sequence present in the pentapeptide: Choose the correct answer from the options given below:

Define the following terms related to proteins: $(i)$ Peptide linkage,$(ii)$ Primary structure,$(iii)$ Denaturation.

The central dogma of molecular genetics states that the genetic information flows from

Globular protein is present in -