Question

The size of chlorophyll molecule is
a. Head \[15 \times 15 A^0 \], tail \[25\, A^0 \]
b. Head \[20 \times 20 A^0 \], tail \[25\, A^0 \]
c. Head \[15 \times 15 A^0 \], tail \[20\, A^0 \]
d. Head \[10 \times 12 A^0 \], tail \[10\, A^0 \]

Answer 1

Hint: The chlorophyll pigment is one of the several related green pigments found in many algae and green plants. In general, it is found in any of the mesosomes of blue-green bacteria and in the chloroplasts of plants and algae. According to the terminology, the word chlorophyll is derived from the Greek language. In biological terms, it is said that the Chlorophyll which is also called a green pigment is essential in photosynthesis which allows the plants to captivate the energy from light.

Complete answer:
- The structure of this green pigment called chlorophyll looks just like a tadpole.
It is said that the molecules in chlorophyll have a Porphyrin head and phytol tail.
- The size of the head of Porphyrin is of \[15 \times 15 A^0 \]. The head of porphyrin is said to be hydrophilic and acidic in nature. The shape of its structure is said to be in tetrapyrrole in nature. Magnesium is held by 2 covalent bonds and 2 coordinates.
- The size of the tails of phytol is \[20\, A^0 \] long. The tail of porphyrin is said to be hydrophobic and alcoholic in nature. As we already know, the tail of the molecules of chlorophyll is said to be embedded in the lipid bilayer of the thylakoid membrane.

Hence, the correct answer is option (C), Head \[15 \times 15 A^0 \], tail \[20\, A^0 \].

Note: As we already know the molecules of chlorophyll are distinguished into heads of size $15 \times 15$ angstrom and a tail of 20-angstrom length. The head of the molecule is said to be made up of a cyclic tetrapyrrole closed ring derivative called porphyrin. In addition, the tail of the molecule is made up of a fifth isocyclic ring of cyclopentanone which is called phytol.