The conversion of milk to curd is primarily caused by which microorganism? MCQ with Answer and Explanation

The conversion of milk to curd is primarily caused by which microorganism?
A. Lactobacillus
B. Penicillium notatum
C. Aspergillus niger
D. Saccharomyces cerevisiae
Answer: Option A
Solution (By JKExamLibrary)
The conversion of milk to curd (yogurt) is a fermentation process primarily caused by lactic acid bacteria (LAB), such as Lactobacillus. These bacteria ferment the lactose (milk sugar) into lactic acid. The lactic acid lowers the pH, causing the milk protein (casein) to coagulate and solidify, forming curd. It also improves the nutritional value by producing Vitamin B12.

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During transcription, the enzyme RNA polymerase binds to the:
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B. Terminator
C. Enhancer
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Correct Answer: Option A


Explanation:
RNA polymerase recognizes and binds to the promoter region of DNA, which is located upstream of the coding sequence. This initiates transcription. The terminator signals the end of transcription. Start codon (AUG) is on mRNA where translation begins. Enhancers are regulatory DNA sequences that increase transcription but are not the primary binding site for polymerase.

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Question #2
The vitamin that is part of coenzyme A and is involved in acyl group transfer is:
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Correct Answer: Option D


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The structure in the nephron that filters blood under high pressure is the:
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Correct Answer: Option A


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