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Harmful and Useful Bacteria

Lactobacilli ...

Question

Lactobacilli are harmful bacteria.

A

True

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B

False

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Solution

The correct option is B False
Lactobacilli:
Also known as lactic acid bacteria, Lactobacillus acidophilus is a gram-positive bacterium.
This group of bacteria provides us with a lot of benefits which include improvement in digestion and immunity to curdling milk and many more.
This bacterium also protects us from infectious diseases like traveler's diarrhea and rotaviral diarrhea.
Final answer: The given statement is false.

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Q. State whether the following statements are true or false. Explain your statement.
A. Lactobacilli are harmful bacteria.
B. Cell wall of fungi is made up of chitin.
C. Organ of locomotion in amoeba is pseudopodia.
E. Tomato wilt is viral disease.

Q. Rewrite the following statements using correct of the options and explain the completed statements.
(gluconic acid, coagulation, amino acid, acetic acid, Clostridium, Lactobacilli)
a. Process of -- -- -- -- of milk proteins occurs due to lactic acid.
b. Harmful bacteria in like -- -- -- in the intestine are destroyed due to probiotics.
c. Chemically, vinegar is -- -- --.
d. Salts which can be used as supplement of calcium and iron are obtained from -------- acid.

Write notes on :

(a) mitochondria (b) antibiotics

(c) harmful bacteria (d) useful bacteria

Q. There are more friendly bacteria than harmful bacteria. Explain.

Q. Probiotics are harmful bacteria that cause diseases.

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