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The bacteria which spoil cooked food are...

The bacteria which spoil cooked food are……..

A

Saccharomyces

B

Lactobacilli

C

Clostridium

D

Rhizobium

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Answer the following Read the paragraph and answer the questions given below it. Food poisoning can occur due to contamination of food by various bacteria and fungi.Clostridia are bacteria responsible for spoilage of cooked food. There are around 100 species of this bacteria viz. Clostridium tetani, Clostridium botulinum, etc. that are present either free living in soil or the alimentary canal of humans and other animals. The bacteria are rod- shaped and produce pottle-shaped endospores in adverse environmental conditions. These microbes cannot withstand normal oxygen levels in air and grow under anaerobic conditions. How does Clostridium survive even under adverse conditions?

Answer the following Read the paragraph and answer the questions given below it. Food poisoning can occur due to contamination of food by various bacteria and fungi.Clostridia are bacteria responsible for spoilage of cooked food. There are around 100 species of this bacteria viz. Clostridium tetani, Clostridium botulinum, etc. that are present either free living in soil or the alimentary canal of humans and other animals. The bacteria are rod- shaped and produce pottle-shaped endospores in adverse environmental conditions. These microbes cannot withstand normal oxygen levels in air and grow under anaerobic conditions. Why is Clostridium mostly found to contaminate tinned or canned foodstuff?

Answer the following Read the paragraph and answer the questions given below it. Food poisoning can occur due to contamination of food by various bacteria and fungi.Clostridia are bacteria responsible for spoilage of cooked food. There are around 100 species of this bacteria viz. Clostridium tetani, Clostridium botulinum, etc. that are present either free living in soil or the alimentary canal of humans and other animals. The bacteria are rod- shaped and produce pottle-shaped endospores in adverse environmental conditions. These microbes cannot withstand normal oxygen levels in air and grow under anaerobic conditions. Do you know about any rod-shaped, anaerobic micro-organism that is useful to humans?

State whether the following statements are true or false. Correct the false statements: The bacteria Lactobacilli cause food-poisoning.

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CHETANA PUBLICATION-Useful and Harmful Microbes-EXERCICE
  1. Molasses is fermented with the help of yeast called………..

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  2. A yeast…...is used to absorb the toxins released during the production...

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  3. The bacteria which spoil cooked food are……..

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  4. …………….can grow and reproduce only in living cells.

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  5. Asexual reproduction occurs by budding in yeast.

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  6. Explain the statements: Toxins of fungal origin are called mycotoxin...

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  7. Answer the following question: How to Lactobacilli convert milk into ...

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  8. What are the disadvantages of inorganic fertilizers?

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  9. Explain the statements: Amoxicillin is a broad-spectrum antibiotic

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  10. Explain the statements: Ethanol is produced by the fermentation of mo...

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  11. Explain the statements: Clostridium bacteria produce bottle-shaped e...

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  12. Complete the statements using the proper option from those given below...

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  13. Foam accumulates on the surface of 'dal' kept for a long time in summe...

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  14. Why are naphthalene balls kept with clothes to be put away?

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  15. Answer the following question: How to Lactobacilli convert milk into ...

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  16. Antibiotics can be taken only when prescribed by doctors.

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  17. Nowadays, seeds are coated with Rhizobial solution or powder before so...

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  18. Antibiotics are not effective against common cold or influenza.

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  19. Cotton fabrics, gunny bags, leather items and wooden items do not last...

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  20. Food on which fungi has grown cannot be eaten

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