Amino Acids and Proteins

What are simple proteins?

Coagulated egg white can be renatured.

What are derived proteins?

The reversible process by which the original form of the denatured protein can be regained is called _____. 

Renaturation of proteins is always a reversible process.

Explain renaturation of proteins.

What are the biological importance of proteins?

Identify the naturally occurring amino acids from the following.

Valine is a naturally occurring amino acid.

Which of the following is not a naturally occurring amino acid?

Give examples of some naturally occurring amino acids?

Which protein structure is the most complex?  (primary / tertiary / quaternary) 

The spatial arrangement of subunits with respect to each other is known as _____ structure of proteins.

The isoelectric point is a

Amino acids are classified as acidic, basic, or neutral depending upon the relative number of amino and carboxyl acid groups in their molecule. Which among the following are acidic?

(a) 

(b) 

(c) 

(d) 

Amino acids are classified as acidic, basic, or neutral depending upon the relative number of amino and carboxyl acid groups in their molecule. Which among the following are acidic?

(a) 

(b) 

(c) 

(d) 

Which of the list shown below have the correct pair of the structure of alanine in $\mathrm{pH}$ ranges $2-4$ and $9-11$ is

I. ${\mathrm{H}}_3\stackrel{+}{\mathrm{N}}-\mathrm{CH}\left({\mathrm{CH}}_3\right){\mathrm{CO}}_2\mathrm{H}$

II. ${\mathrm{H}}_2\mathrm{N}-\mathrm{CH}\left({\mathrm{CH}}_3\right){\mathrm{CO}}_2^{-}$

III. ${\mathrm{H}}_3\stackrel{+}{\mathrm{N}}-\mathrm{CH}\left({\mathrm{CH}}_3\right){\mathrm{CO}}_2^{-}$

IV. ${\mathrm{H}}_2\mathrm{N}-\mathrm{CH}\left({\mathrm{CH}}_3\right){\mathrm{CO}}_2\mathrm{H}$