Antibiotics

Q. Name any five antibiotics. State their source and the disease against which they are used. [5 MARKS]

Q.

What is methanogenesis?

Q. Common cold is not cured by antibiotics because:

1. It is caused by a bacteria
2. It is not an infectious disease
3. It is caused by a virus
4. It is cured by vaccines

Q.

What are antigens and antibodies on rbc

Q.

The term antibiotics was coined by__.

Q. ___ is an effective antibiotic against tuberculosis.

1. Rifamycin
2. Gentamycin
3. Streptomycin
4. Vancomycin

Q.

Edward Jenner is the scientist who first discovered antibiotics.

1. False

2. True

Q.

What are antibiotics?

Q. Which of these following statements are true about antibiotics?

1. It destroys the bacteria that are useful to the body.
2. It reduces quantity of some vitamins within our body.
3. The pathogens tend develop resistance against them.
4. It causes the number of pathogens to increase before destroying them.

Q. The following experiment was conducted by Edward Jenner. What is the name of the process observed?

1. Vaccination
2. Sign
3. Symptom
4. Identification

Q. Penicillin is

1. An antiseptic
2. An anti-toxin
3. An antibiotic
4. A disinfectant

Q. In 1928, a scientist discovered the first effective antibiotic. The scientist and antibiotic are ___.

1. Alexander Fleming - Streptomycin
2. Alexander Fleming - penicillin
3. Selman Waksman - Penicillin
4. Selman Waksman - Streptomycin

Q. Differentiate between antiseptic and antibiotic. [2 MARKS]

Q.

Antibiotics are chemicalsubstances that are derived from microbes like ______.

1. fungi

2. bacteria

3. both A and B

4. virus

Q. Name the antibiotic invented by Alexander Fleming.

1. Pencillin
2. Ampicillin
3. Amoxicillin
4. None of these

Q.

Streptomycin is an antibiotic.

1. Alcohol

2. Metronidazole

Q.

Can bacterial infection go away with antibiotics?

Q.

Find the odd one out:
Lactobacillus acidophilus, Lactobacillus casei, Bifidobacterium bifidum, Streptococcus thermophilus

Q.

The first antibiotic penicillin was discovered in _______.

1. 1932

2. 1934

3. 1928

4. 1930

Q. List any four ways in which the antibiotics are being used. [4 MARKS]

Q.

Azospirillium and Azotobactor are examples for:

1. Decomposers

2. Pathogens

3. Free-living N2 fixating bacteria

4. Symbiotic N2 fixative

Q.

Which of the following statements are false regarding antibiotics?

1. Destroys useful bacteria in the body.

2. Increases the number of pathogens before it begins its action.

3. Regular use develops immunity in pathogens against antibiotics

4. Reduces the quantity of some vitamins, in the body.

Q. Dumping sewage into lakes the BOD of the water in the lakes.

1. does not affect
2. increases
3. decreases
4. nullifies

Q.

___ is a milk product that contains active bacteria.

1. Yoghurt

2. Probiotics

3. Butter

4. Cheese

Q.

Sita was ill so she went to a hospital. The doctor prescribed antibiotics. Why did the doctor prescribe antibiotics to sita for her illness?

Q.

Rifamycin is effective against ___

1. jaundice

2. Maleria

3. tuberculosis

4. dengue

Q. What is the primary source of antibiotics?

1. Plants
2. Chemical synthesis
3. Microbes
4. All of the above

Q.

What are the uses of antibiotics and vitamin $B_{12}$?

Q. Ram was suggested to take antibiotics when he previously had an infection. Remembering this, everytime he had an infection, he directly started taking antibiotics. Eventually when he consulted the doctor, he was advised against regular use of antibiotics. What could the reason(s) be for him being advised?

1. Antibiotics may end up destroying useful bacteria.
2. Harmful bacteria may develop resistance to the medicine.
3. Antibiotics may eventually start promoting the growth of pathogen.
4. Antibiotics cause reduction of quantity of certain vitamins in our body.

Q. Antibiotic works only on bacteria.

1. True
2. False