3. Multiple choice. Which of the following about polysaccharides is not true? (1

Question

3. Multiple choice. Which of the following about polysaccharides is not true? (1 point) a. Provides a source of carbon to the cell b. Can be used as an energy source c. Made of amino acids d. Can be used for cellular structures e. All the above are true 4. Calcium chloride is an ionic compound important to microbiology. You mix a small portion of calcium chloride with water. Do you expect it to dissolve, why or why not? (2 points) Last question on back of page 5. Describe three (3) different reasons why studying microbiology is important or unique. Said differently, what are three (3) things that microbes do that other types of organisms do not do. (3 points)

Explanation / Answer

Answer:

3)(c) made of amino acids

Explanation :

-Carbohydrates are the main source of Carbon and energy to the cell.

- Some carbohydrates such as cellulose provides structural support to the cell

- proteins are made of amino acids

- polysaccharides are made up of sugars

4) Calcium chloride is an ionic compound i.e polar compound. When it is mixed with water it will get dissolved in water as water is also an ionic solvent. And by Like dissolve like phenomenon, polar particles are soluble in polar solvent.

5) Microbiology is the study of microorganisms. These include bacteria, protozoal parasites, viruses and fungi. Such organisms are so minute that they can only be viewed through a microscope

Study of microbiology is important

i) for combating the diseases:

Microbes are responsible for large number of disease. With the study of microbiology we can overcome these diseases

ii) Agricultural purpose :

Many microbes are useful for increasing productivity of crops by making soil fertile and favourable.

iii) As Chemical products :

Many microbes produce useful products such as antibiotics which can be used to combat against many pathogenic microbes

iv) in Biotechnology : Many microbes and their products such as E.coli and plasmids serve important role in biotechnology

Things that microbes do but other organism do not are:

i) Microorganisms are used in the production of fermented food and beverages. E.g. Yeast, Penicillium, Lactobacillus.

ii) Microorganisms is used in making medicines. E.g. In Antibiotics- Penicilium Notatum.

iii) Microorganisms is used in making curd/Yoghurt. E.g. Streptococcus Thermophilus or Lactobacillus.

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