• Comparative Proteomics and Genome Architecture:
• Large-scale sequencing and domain architecture analyses (Pfam / SMART) across the Human Genome Project revealed:
• The human proteome is largely modular, built by shuffling ancient, highly conserved eukaryotic protein domains.
• Humans and vertebrates share virtually all of their basic protein domain repertoire with invertebrates; only a very small number ($\lt 7\%$) of protein domains are unique to vertebrates, and virtually no domain is uniquely restricted to humans alone.
• nalysis:
• (human genome contains a small number of protein domains that are unique to vertebrates): Correct.

Correct option: (2) human genome contains a small number of protein domains that are unique to vertebrates

• Chirality of Amino Acids:
• In 19 of the 20 standard proteinogenic amino acids, the central $\alpha$-carbon is covalently bound to four different chemical substituents: $-\text{COOH}$, $-\text{NH}_2$, $-\text{H}$, and a variable side chain ($-\text{R}$). This makes the $\alpha$-carbon an asymmetric (chiral) center.
• In Glycine, the side chain is simply a hydrogen atom ($-\text{H}$). Because the $\alpha$-carbon is bound to two identical hydrogen atoms, it has no chiral center and is optically inactive.

Correct option: (3) Glycin