1 The quaternary structure of proteins is represented by the

1. The quaternary structure of proteins is represented by the

a.Amino acid sequence

b.Alpha helix

c. Arrangement of subunits

d.Beta pleated sheet

e.Three dimensional conformation

2. Termination of translation occurs when a stop codon is reached within the ribosome’s P site which binds to a protein that mimics tRNAs and releases the peptide chain.

a.true

b.false

Solution

1. Option C. Arrangement of subunits.

Aminoacid sequence refers to the primary structure. Alpha helix and beta sheets refers to the secondary structure, three dimensional shape refers to the tertiary structure and arrangement and interaction of protein subunit is referred as quaternary structure of protein.

2. True.

When the ribosome reaches the stop codon no tRNA with specific Aminoacid binds to ribosome A site, instead a protein which mimics tRNA binds to P site and stops the translation.