Question

Study the following type of secondary metabolite and select the correct option.
i) Terpenes: Made from mevalonic acid that is composed mainly of carbon and hydrogen.
ii) Phenolics: Extremely diverse class may also contain sulphur.

• A. i is only correct.
• B. ii is only correct
• C. Both i and ii are correct
• D. Both i and ii are incorrect

Hint:

Terpenes come from the mevalonic acid pathway and are made of carbon and hydrogen, while phenolics are not the sulfur-containing group.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
Secondary metabolites are grouped by chemical nature, including terpenes, phenolics and nitrogen-containing compounds.

Step 2: Statement i
Terpenes are built from isoprene units made through the mevalonic acid pathway, and they consist mainly of carbon and hydrogen. So statement i is correct.

Step 3: Statement ii
Phenolics are made from simple sugars and contain benzene rings with hydrogen and oxygen. They do not contain sulfur, so statement ii is incorrect. The class that may also contain sulfur is the group of nitrogen-containing compounds, such as alkaloids and glucosinolates.

Final Answer:
Only statement i is correct. \[ \boxed{\text{(A) }\text{i is only correct.}} \]