Which can preserve food stuff?
A. Sugar and vinegar
B. Salt and sugar
C. Vinegar
D. All of these
Answer: Option D
Solution(By Examveda Team)
Sugar and vinegar, Salt and sugar and Vinegar can preserve food stuff.Vinegar may be used to pickle food, a preservation method that extends the shelf life of perishable foods by killing bacteria. Pickling involves soaking a food in a brine solution made from vinegar, water, salt, and sugar, which also changes the food's flavor.
Use of salt and sugar curing to prevent microbial growth. Sugar as a preservative by acting as a humectant (maintaining and stabilising the water content in foods) sugar helps to prevent or slow the growth of bacteria, moulds and yeast in food like jam and preserves.
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Which photosynthetic bacteria possess both PS I and PS II?
A. Purple sulphur bacteria
B. Cyanobacteria
C. Purple nonsulphur bacteria
D. Green sulphur bacteria
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