Question

In Ascidia, the testis is soft thick and transparent it is composed of.

• A. Mucin
• B. Tunicirine
• C. Bilirubin
• D. Porphine

Answer 1

The correct option is B

Tunicirine

The correct option is B.

Explanation of correct option:

Option B:

1. Ascdia belongs to the phylum Chordata.
2. They are aquatic organisms belonging to the invertebrate genus tunicates.
3. They have a barrel-like structure with their posterior end attached to a fixed object.
4. They have two siphons (openings) to draw water and filter out food.
5. They have a tunic that is tough and made up of polysaccharide cellulose.
6. The tunic is present on the outer side.

Explanation of the incorrect options:

Option A:

1. Mucin is one of the most abundant biomolecules found in mucus secretion (slippery aqueous secretions produced by mucus membranes).
2. Its major function is to provide lubrication.
3. They tend to cover various protozoan organisms, fungi, viruses, human organs, etc.
4. The testis of Ascidia is not made up of mucin.

Option C:

1. It is a pigment that is yellow.
2. It is produced upon the breakdown of red blood cells.
3. It may act as an indicator of liver or bile duct problems.
4. The testis of Ascidia is not made up of bilirubin.

Option D:

1. It is an aromatic organic chemical compound that is composed of four heterocyclic pyrrole-like rings.
2. It forms a large macrocycle ring.
3. They are found in hemoglobin molecules in the blood and play an essential role in carrying oxygen while binding to the iron group.
4. The testis of Ascidia is not made up of porphine.

Final answer: In Ascidia, the testis is soft thick, and transparent it is composed of Tunicirine.