Question

which term among a - d is not correctly matched with its proper definition? carbon: generally has the biggest influence in determining the level of biomass that can be achieved by a bacterial culture. auxotrophs: deficient in a particular metabolic pathway. macronutrient: phosphorous and sulfur are in this category. growth factor: components, either defined or undefined (like vitamins, blood), that promote/support growth. a - d are all correctly matched.

Explanation:

Macronutrients typically include carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur. Phosphorus and sulfur are macronutrients, but the description in option B is incomplete as it doesn't comprehensively define macronutrients. Growth factors are substances like vitamins, amino - acids etc. that promote growth. Auxotrophs are organisms deficient in a particular metabolic pathway. Carbon is a crucial element influencing bacterial biomass.

Answer:

B. Macronutrient: phosphorous and sulfur are in this category