Which of the following microorganisms is used in the production of curd from milk? MCQ with Answer and Explanation

Which of the following microorganisms is used in the production of curd from milk?
A. Salmonella typhi
B. Lactobacillus
C. Clostridium botulinum
D. Streptococcus pneumoniae
Answer: Option B
Solution (By JKSSB Mock Tests)
Lactobacillus species convert lactose (milk sugar) into lactic acid, which lowers the pH and causes milk protein casein to coagulate, forming curd. This fermentation process also gives curd its characteristic sour taste. S. pneumoniae causes pneumonia, Salmonella typhi typhoid, Clostridium botulinum botulism. Lactobacillus is also a probiotic.

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The first cloned mammal, Dolly the sheep, was created using:
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B. Artificial insemination
C. Recombinant DNA
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Correct Answer: Option D


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A. Palmitic acid
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Correct Answer: Option A


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Saturated fatty acids have no double bonds between the carbon atoms in their hydrocarbon chain, making them 'saturated' with hydrogen atoms. They are typically solid at room temperature. Palmitic acid and stearic acid are common saturated fats. Oleic, linoleic, and linolenic acids are unsaturated fatty acids, containing one or more double bonds.

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