If raw milk contains 10,000 LAB, and a small amount of curd (inoculum) containing millions of LAB is added, what condition is necessary for the rapid multiplication of LAB?
A small amount of curd... contain millions of LAB, which at suitable temperatures multiply, thus converting milk to curd.
Question 132 of 455
📘 CLASS XII
Which food item is one of the oldest in which microbes were used?
Cheese, is one of the oldest food items in which microbes were used.
Question 133 of 455
📘 CLASS XII
The production of beverages like wine, beer, whisky, brandy, or rum has utilized yeasts since when?
Microbes especially yeasts have been used from time immemorial for the production of beverages like wine, beer, whisky, brandy or rum.
Question 134 of 455
📘 CLASS XII
Antibiotics are generally defined as chemical substances produced by some microbes that function to:
Antibiotics are chemical substances, which are produced by some microbes and can kill or retard the growth of other (disease-causing) microbes.
Question 135 of 455
📘 CLASS XII
Which bacterial species produces the organic acid Butyric acid?
Clostridium butylicum (a bacterium) is an acid producer of butyric acid.
Question 136 of 455
📘 CLASS XII
Which enzyme is utilized to clarify bottled fruit juices, making them clearer than homemade ones?
The bottled juices are clarified by the use of pectinases and proteases.
Question 137 of 455
📘 CLASS XII
Which bioactive molecule helps in lowering blood cholesterol?
Statins... have been commercialised as blood-cholesterol lowering agents.
Question 138 of 455
📘 CLASS XII
Sewage treatment plants (STPs) are essential before disposal of municipal waste water because it contains large amounts of organic matter and microbes, many of which are:
Sewage... contains large amounts of organic matter and microbes. Many of which are pathogenic.
Question 139 of 455
📘 CLASS XII
What phase of sewage treatment involves the removal of floating debris and grit?
Primary treatment: These treatment steps basically involve physical removal of particles—large and small—from the sewage through filtration and sedimentation.
Question 140 of 455
📘 CLASS XII
If a sample of water has a BOD value of 8 mg/L (Sample B), and untreated sewage has 400 mg/L (Sample C), Sample B most likely represents:
A low BOD value indicates low organic matter/low pollution potential. The river water is assumed to be relatively clean.
