Structure and Functions of Proteins

Which among the following is not an essential amino acid?

Methionine and cysteine contain an element which is

Cereals and millets are mainly deficient in which amino acids?

Which of the following is the simplest amino acid?

How many $\beta$ chains are present in a normal haemoglobin (Hb A) in adults?

How many subunits are present in one haemoglobin molecule?

The smallest structural units of proteins are called

Which of the followings can bring about the denaturation of proteins

Amino acid analysis of two globular protein samples yielded identical composition per mole. Which one of the following characteristics is necessarily identical for the two proteins$?$

If the acidic, basic and hydrophobic residues of proteins are considered to be red, green and blue in colour, respectively, then a globular protein in aqueous solution would have

Which one of the following amino acids is least likely to be in the core of a protein$?$

Which one of the pairs of amino acids contains two chiral centres?

Arrange the following four levels of protein structures - Primary (I), Secondary (II), Tertiary (III), and Quaternary (IV) in a correct match:

Assertion (A): Glucose $+\mathrm{ATP}\stackrel{\text{ Hexokinase }}{⟶}$ Glucose $-6-$ Phosphate $+\mathrm{ADP}$.

Reason (R): The enzyme which catalyzes this reaction belongs to the enzyme class "transferase".

The correct answer is:

Identify the amino acids containing a hydroxyl group in their structure:
i) Cysteine
ii) Threonine
iii) Tyrosine
iv) Glutamic acid

The most abundant protein in the human body is _________.

Select the neutral amino acid among the following.

Find the wrong statement:
(A) Polymers of polysaccharides, fats and proteins are synthesised from monomers by ionic bonding.
(B) Molecules with polar heads and hydrophobic tails are present in the cell membrane.
(C) Left end of the protein chain is N-terminal end.
(D) Right and left-handed helices are observed in protein.
The correct answer is

Which structure of protein is absolutely necessary for the many biological activities of proteins?

Change of $\mathrm{pH}$ may disturb protein structure and thus affecting its functions. Which level of protein structure is not generally affected by the change in $\mathrm{pH}$ ?