5 Most VSAQ’s of Biomolecules Chapter in Inter 2nd Year Chemistry (TS/AP)

2 Marks

VSAQ-1 : What is Zwitter ion? Give an example.

A Zwitterion, also known as an amphoteric ion or dipolar ion, is a molecule that possesses both positive and negative charges within its structure, rendering it electrically neutral overall. This intriguing property arises from the presence of both acidic and basic functional groups within the same molecule, allowing for intra-molecular proton transfer.

VSAQ-2 : What are amino acids? Give two examples.

Amino acids are organic compounds essential as the basic building blocks of proteins. They possess both an amino group (-NH₂) and a carboxylic acid group (-COOH) within their molecular structure.

VSAQ-3 : What are essential and non-essential amino acids? Give one example for each.

Essential amino acids are those that the body cannot synthesize and must be obtained through the diet. An example is valine. Non-essential amino acids can be produced by the body itself. An example is glycine. Both essential and non-essential amino acids are vital for maintaining good health and supporting various biological functions in the body.

VSAQ-4 : What are proteins? Give an example.

Proteins are complex biomolecules composed of amino acids linked together by peptide bonds. They serve diverse and critical functions in the body, including providing structural support, facilitating biochemical reactions, and regulating various cellular processes.

VSAQ-5 : Differentiate between globular and fibrous proteins.

Globular Proteins:

  1. Structure: Compact, spherical shape.
  2. Solubility: Highly soluble in water due to hydrophilic regions on the surface.
  3. Function: Versatile, involved in metabolic and regulatory functions. Examples include enzymes, transport proteins, and antibodies.

Fibrous Proteins:

  1. Structure: Long, thread-like or fibrous shape.
  2. Solubility: Typically insoluble or slightly soluble in water, mainly hydrophobic.
  3. Function: Primarily provide structural support and stability to tissues and organs. Examples include collagen, keratin, and fibroin.