Advertisements
Advertisements
प्रश्न
The following is an antibiotic.
पर्याय
Sodium bicarbonate
Streptomycin
Alcohol
Yeast
Advertisements
उत्तर
Streptomycin
Explanation:
Antibiotics are chemical compounds produced by some microorganisms that, in low concentrations, can kill or slow the growth of hazardous microbes while having no adverse effects on their hosts. Streptomycin is an antibiotic derived from the fungus Streptomyces griseus. It is beneficial against certain local infections, including pneumonia and tuberculosis.
APPEARS IN
संबंधित प्रश्न
Give reasons.
Fodder is soaked in water before offering to cattle.
Shelf life of yogurt can be increased by pasteurization.
Give scientific reason.
The landfill pit is lined with plastic sheets.
Read the following paragraph and write the answers to the questions asked.
Sulphuric acid is present in the acid rain and materials coming out of mines. You know that erosion of metals present in statues, bridges and buildings occurs due to it. Sulphuric acid is a source of energy for some species of bacteria like Acidiphilium spp. and Acidithiobacillus ferrooxidans. Hence, these bacteria can control the soil pollution occurring due to acid rain. Water soluble salts of uranium are present in the wastes produced during electroplating and in effluent released in the environment from the atomic energy plant. Geobacter convert these salts of uranium into insoluble salts and thereby prevent those salts from mixing with groundwater sources.
- What causes metal erosion in statues, bridges and buildings?
- Sulphuric acid is the source of energy for which bacteria?
- What kind of pollution do these bacteria control?
- What are the water soluble salts in atomic energy plants and in the process of electroplating?
- Which bacteria prevent these salts from mixing with ground water by converting them Into insoluble salts?
Write the answers to the questions by observing the figure.
- What type of fuel production process is shown in the figure?
- Write two examples of each of the solid, liquid and gaseous fuels produced in this fuel production process?
- How do microorganisms play their role in this process?
Microorganism can be seen with the help of a _______.
Unscramble the jumbled word underlined in the following statement.
Curbossulite is an air-borne disease caused by a bacterium
Match the microorganisms given in the Column A to the group to which they belong in Column B.
| Column A | Column B |
| (a) Lactobacillus | (i) Algae |
| (b) Aspergillus | (ii) Protozoa |
| (c) Spirogyra | (iii) Fungi |
| (d) Paramecium | (iv) Bacteria |
What is pasteurization?
Baker’s yeast is ______.
