Antibiotics

Q.

Short note on antibiotics.

Q.

Match the micro-organisms in column A with their action in column B:

(i) Bacteria (a) Fixing nitrogen

(ii) Rhizobium (b) Setting of curd

(iii) Lactobacillus (c) Baking of bread

(iv) Yeast (d) Causing malaria

(v) A protozoan (e) Causing cholera

(vi) A virus (f) Causing AIDS

(vii) Penicillium (g) Producing antibiotics

Q. Which of the following is not an antibiotic?

1. Penicillin
2. Paracetamol
3. Erythromycin
4. Streptomycin

Q.

Ancient Egyptians applied mouldy bread on infected cuts & wounds to heal them , why do you think this helps in healing the wounds. Now a days we do not use mouldy breads to cure infections. what do we use instead ?

Q.

Why are antibiotics not effective against 'common cold' and 'flu'?

Q.

Name any two antibiotics.

Q. Question 9
What are antibiotics? What precautions must be taken while taking antibiotics?

Q.

The first antibiotic called penicillin was extracted from :

(a) a bacterium (b) a protozoan (c) a fungus (d) an alga

Q.

What is the difference between antibiotics and antiseptics?

Q.

What are probiotics?

Q. What is immunization

Q. Question 2 (b)
Which of the following is an antibiotic?

a) Sodium bicarbonate
b) Streptomycin
c) Alcohol
d) Yeast

Q. The medicines which stop the growth of other disease causing microorganisms are known as _____.

1. antidotes
2. antigens
3. antibiotics
4. antiserums

Q. Dr. Alexander Fleming was awarded the Nobel Prize in the year 1945 for the discovery of ________.

1. vaccine
2. penicillin
3. streptomycin
4. erythromycin

Q.

Penicillin is obtained from a protozoan.

1. True
2. False

Q.

Name any three antibiotics.

Q.

Name an antibiotic extracted from fungus (mould).Name the fungus.

Q. What are probiotics? give examples.

Q.

How useful are non-pathogenic bacteria in food?

Q. Dr Alexander Fleming discovered the first anibiotic called _________ in the year 1929.

1. streptomycin
2. tetracycline
3. penicillin
4. vaccine

Q.

What are anitibiotics ? What precautions must be taken, while taking antibiotics ?

Q. Explain the discovery of penicillin.

Q.

What is an allergen? Give three examples

Q. Penicillin is an antibiotic, which is extracted from ________

[Review question: Pg. No: 202 ]

1. Pteridophytes
2. Fungi
3. Bryophytes
4. Algae

Q.

Antibiotics are ineffective against ___.

Q. Match the plant diseases with the type of microrganisms that causes it.

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{a. Citrus canker}& \text{i. Fungi}\\ \text{b. Rust of wheat}& \text{ii. Bacteria}\\ \text{c. Yellow vein mosaic}& \text{iii. Virus}\end{array}$$

1. a­ - i, b­ - ii, c - i­ii

2. a - ­ii, b - ­i, c­ - iii

3. a - iii, b - ­ii, c - i

4. a - ­ii, b­ - iii, c - i

Q. Rahul has caught the flu and is terribly sick. His doctor prescribed him some antibiotics. Which one of the following is the best reason why Rahul was prescribed antibiotics?

1. Antibiotics will prevent other bacteria from attacking.
2. Antibiotics will prevent the flu virus from attacking in future.
3. Antibiotics will attack and kill the flu virus.

Q. The precaution is observed in the use of antibiotics. Choose the incorrect statement

1. Antibiotic may kill the useful bacteria in the body and harm us.
2. Antibiotics should be taken only on the advice of perfect doctor.
3. Wrong dose of antibiotics makes the antibiotic less effective.
4. None of these

Q.

Name the scientist who discoverd 'penicillin'.

Q. Doctors commonly prescribe antibiotics during bacterial infections. Penicillin is one such example. It is produced by fungi, which are microorganisms.
How does an antibiotic work?

1. It reduces body temperature
2. It provides immunity
3. It becomes a food resource for bacteria
4. It kills pathogen