Proteins

Define zwitterion.

Which of the following ions are electrically neutral?

Amino acids can exist in _____ (zwitter/negative) ions.

Which of the following substance can exist as zwitterion?

Two functional groups having the opposite charge is present in zwitter ions.

Fill in the blank with the correct option provided in the bracket.

Adult haemoglobin possesses a total of _____(2/4/6) subunits. 

There are 2 subunits present in a haemoglobin molecule.

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

How many subunits are present in one haemoglobin molecule?

Write what will happen while titrating an amino acid against a weak base and discover the number of dissociating (ionizable) functional groups in the amino acid.

Can you describe what happens when milk is converted into curd or yoghurt, based on your understanding 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.