NEET · Biology · Microbes in Human Welfare doubts
10 doubts found
How does a spoonful of old curd turn a bowl of warm milk into fresh curd?
The starter curd carries Lactobacillus bacteria.
What makes bread rise and dough fluffy, and how is the same microbe used to brew alcohol?
Both use yeast, a fungus that ferments sugars.
Where do antibiotics like penicillin actually come from?
Many antibiotics are made BY microbes to fight other microbes.
How is cattle dung turned into biogas for cooking, and why is it 'green' fuel?
In a biogas plant, cattle dung and water are digested by anaerobic bacteria, including methanogens (found in the gut of cattle).
How do Rhizobium bacteria act as a natural fertiliser for crops?
Rhizobium lives in the root nodules of legumes (peas, beans, gram) in a symbiosis.
What does “Fermentation by microbes” actually mean in Microbes in Human Welfare, and why does it matter for NEET?
microbes break down sugars anaerobically into useful products — lactic acid (curd), or ethanol and CO₂ (bread, alcohol).
I keep getting “Fermentation by microbes” questions wrong in Microbes in Human Welfare. What's the trap?
thinking fermentation always needs oxygen.
What does “Biofertilisers” actually mean in Microbes in Human Welfare, and why does it matter for NEET?
living microbes like Rhizobium and cyanobacteria enrich soil naturally by fixing atmospheric nitrogen.
I keep getting “Biofertilisers” questions wrong in Microbes in Human Welfare. What's the trap?
assuming only chemical fertilisers can supply nitrogen.
What is the difference between Lactobacillus (curd) and yeast (bread/alcohol)?
Lactobacillus ferments milk sugar into lactic acid, setting milk into curd; yeast ferments sugars into ethanol and CO₂, leavening bread and brewing alcohol.