Question

pants, Louir part
receiving a nucleus
conditions, the cyst ruptures
releasing many daughter cells.
Step 2
of Amo
Fig 2.12 Binary fission in Amoeba
Fig 2.13 Multiple fission in A
Questions
Name the bacteria that are responsible for each of the following conditions.
1. Spoilage of food
2. Causing cholera
3. Making curd
4. Living symbiotically in root nodules of legume
5. Synthesis of vitamin B
ngdom Fungi TP
ngdom Fungi consists of plant-like
ganisms that are mostly multicellular
Yeasts are the only unicellular
fungi; all other fungi are multic
Funai are oukarotin oraanism​

Answer 1

${\overbrace{\underbrace{\orange{Q}\green{U}\orange{E}\green{S}\orange{T}\green{I}\orange{O}\green{N}}}}$

Name the bacteria that are responsible for each of the following conditions.

1. Spoilage of food

2. Causing cholera

3. Making curd

4. Living symbiotically in root nodules of legume

5. Synthesis of vitamin B

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$\huge\mathfrak\red{A}\orange{N}\blue{S}\orange{W}\green{E}\pink{R}$

$\bf\purple{\implies\:spoilage\:of\:food\:}$

moulds and yeasts

• It is the change of look, consistency, flavor and odor of foods, and is caused by bacteria, moulds and yeasts. Bacteria: Examples of action of bacteria involved in food spoilage: Lactic acid formation: Lactobacillus, Leuconostoc. Lipolysis: Pseudomonas, Alcaligenes, Serratia, Micrococcus

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$\bf\purple{\implies\:causing\:cholera\:}$

Vibrio cholerae.

• Cholera is an acute diarrhoeal infection caused by ingestion of food or water contaminated with the bacterium Vibrio cholerae.

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$\bf\purple{\implies\:making\:curd\:}$

Lactobacillus

• Curd may contain a wide variety of bacteria like Lactobacillus acidophilus, Lactococcus lactis, Lactococcus lactis cremoris etc, whereas yoghurt contains Streptococcus thermophillus and Lactobacillus bulgaricus but mainly lactobacillus

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$\bf\purple{\implies\:synthesis\:of\: vitamin\:B}$

Pseudomonas denitrificans, Bacillus megaterium, and Propionibacterium freudenreichi

• Humans cannot synthesize vitamin B12, and, thus must obtain it from organisms that can. Only a limited number of bacteria are known to produce vitamin B12, three of which—Pseudomonas denitrificans, Bacillus megaterium, and Propionibacterium freudenreichii—are used for commercial production [46–48].