NEET Zoology Microbes in Human Welfare MCQs

Certain bacteria found in traditionally fermented Indian foods like idli and dosa produce a unique exopolysaccharide that contributes to their texture. This EPS also exhibits prebiotic properties, selectively promoting the growth of beneficial gut microbes. Which of the following is this EPS?

The 'Swiss cheese' effect in some fermented dairy products is attributed to the metabolic activity of certain bacteria. These bacteria produce which of the following gases responsible for the characteristic holes?

Which specific bacterial enzyme plays a crucial role in the curd formation during the preparation of yogurt by hydrolyzing milk proteins?

During bread making, the characteristic 'sourdough' flavor is primarily due to the production of which acid by heterofermentative lactic acid bacteria?

Which specific group of bacteria plays a critical role in the production of biogas, particularly methane, by carrying out methanogenesis in anaerobic digesters within household biogas plants?

Certain fungi are employed in the production of specific cheeses, contributing to their unique flavor and texture. Which fungal genus is traditionally used in the ripening of Roquefort cheese, imparting its characteristic blue veins and pungent aroma?

A mixture of gases containing 0.2 moles of O2, 0.3 moles of N2, and 0.5 moles of H2 is collected at STP. If 20% of the H2 escapes due to a leak, what is the final volume occupied by the remaining gas mixture?

A real gas deviates most from ideal behavior at STP when it has:

If the density of a gas at STP is $1.96\:g/L$, what is its molar mass?

A gaseous mixture of ethane (C2H6) and propane (C3H8) occupies 44.8 L at STP. If the mass of the mixture is 80g, what is the mole fraction of ethane?