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B
Secondary metabolites
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C
Feed stock
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D
Inoculum
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Solution
The correct option is A Primary metabolites
Sugars are carbohydrates that are sweet in taste.
Amino acids are constituent monomers of proteins.
Both are primary metabolites because they are the first biomolecules synthesized from inorganic elements like nitrogen, carbon, hydrogen, and oxygen.
Secondary metabolites include resins, alkaloids, terpenes, etc which are synthesized in plants from primary metabolites and are not directly involved in the primary metabolism of plants but confer some special properties like defense, aroma, color, etc.
Inoculum is used in microbiology to denote a part of a microbial culture that can be used for various purposes.
Feedstock has a different meaning in different concepts and may be used to denote raw material or start material in industrial microbiology.