Question

Match List I with List II:

List I		List II
A.	Penicillin	I.	Single cell protein
B.	Penicillin	II.	Ion exchange chromato- graphy for recovery
C.	Streptomycin	III.	Primary metabolite
D.	Amino acids	IV.	Phenyl acetic acid as precursor

Choose the correct answer from the options given below:

• A. A-II, B-I, C-IV, D-III
• B. A-III, B-II, C-I, D-IV
• C. A-II, B-III, C-IV, D-I
• D. A-IV, B-I, C-II, D-III

Answer 1

The Correct Option is D

To correctly match List I with List II, we need to understand what each item in List II refers to in terms of the processes or products involved:

1. Penicillin: Penicillin production involves the use of certain precursors. Phenylacetic acid is one such precursor used in the fermentation process to produce Penicillin. Hence, Penicillin (A) matches with IV (Phenyl acetic acid as precursor).
2. Single cell protein: This refers to microbial biomass production, commonly used in producing alternative protein sources for food and feed. Streptomycin does not relate here, and instead, this should relate to Penicillin (B), often isolated using downstream processes like ion exchange chromatography. Therefore, match B with I (Single cell protein).
3. Streptomycin: Streptomycin is an antibiotic that is separated and purified using specific techniques like ion-exchange chromatography, which separates compounds based on their ion charge. Thus, C matches with II (Ion exchange chromatography for recovery).
4. Amino acids: These are typically considered primary metabolites during cellular metabolism. They are essential compounds derived from fundamental biosynthesis pathways and are crucial for various physiological functions. Thus, D matches with III (Primary metabolite).

By analyzing each match based on the relevant biological and chemical processes, we conclude that the correct answer is:

A-IV, B-I, C-II, D-III

Each pairing is based on the specific associations of precursor usage, the process of obtaining antibiotics, and the nature of primary metabolites.