Q 1 – Fungus can be seen with a
(a) microscope
(b) telescope
(c) magnifying glass
(d) both (a) and (c)
Q 2 – Microorganisms are also known as
(a) yeast
(b) microbes
(c) viruses
(d) Amoeba
Q 3 – Pathogens are also called
(a) germs
(b) antigen
(c) antibody
(d) carrier
Q 4 – Bacilli are the bacteria that are
(a) rod-shaped
(b) comma-shaped
(c) curved-shaped
(d) spiral
Q 5 – Spherical-shaped bacteria are called
(a) bacilli
(b) vibrio
(c) spirilla
(d) cocci
Q 6 – Medium that transmits pathogens from an infected person to a healthy one is called
(a) fungi
(b) germs
(c) carrier
(d) none of these
Q 7 – The fungus that is commonly used in bakery and beverage industries is
(a) Penicillium
(b) Yeast
(c) Agaricus
(d) Rhizopus
Q 8 – Substance used to produce immunity against diseases in the living body is called
(a) immune
(b) vaccine
(c) antibody
(d) antigen
Q 9 – Malaria is caused by which type of microbe?
(a) Bacteria
(b) Fungi
(c) Algae
(d) Protozoa
Q 10 – Common cold is caused by which type of microbe?
(a) Bacteria
(b) Virus
(c) Algae
(d) Fungi
Q 11 – Fill in the blanks
1. Bacteria, fungi, protozoa and _______ are the major four groups in which microorganisms are classified.
2. Two microorganisms which live in symbiotic association in lichens are _______
and _______.
3 .We use a _______ to see the microorganisms.
4. The gas released during the preparation of bread is _______
5. Saprophytes and _______ are the two main categories of fungi.
Q 12 – True or false
1.Microbiology is the science of study of microbes.
- All the microorganisms are harmful.
- An instrument called microscope is required to see the microorganisms.
- Microorganisms are found in large number around us.
- Viruses are the most useful microbes.
Q 13 – Match the following
Column A | Column B |
1. Bread making | a. Nitrogen fixation |
2. Rhizobium | b. Yeast |
3. Alexander Fleming | c. Bacteria |
4. Proteus | d. Viral disease |
5. Polio | e. Antibiotics |
Q 14 – What are microorganisms? Give four examples.
Q 15 – Define communicable diseases. Give some examples.
Q 16 – Differentiate between viruses and other microorganisms.
Q 17 – How are carriers harmful to us?
Q 18 – What is the role of bacteria in increasing the soil fertility?
Q 19 – What is sterilisation?
Q 20 – Mention any three ways through which pathogens are transmitted.
Q 21 – Explain various types of bacteria.
Q 22 – It is always suggested that not to eat anything from street hawkers. Why?
Q 23 – Why do idli and dosa maker add some yeast or old batter of pervious day to the newly-made batter and keep it for one day?
Q 23 – Why do idli and dosa maker add some yeast or old batter of pervious day to the newly-made batter and keep it for one day?
Q 25 – Project: Requirements 2 test tubes, marker pen, sugar, yeast powder, 2 balloons and lime water.
Take two test tubes and mark them A and B. Clamp these tubes in a stand and fill them with water leaving some space at the top. Put two spoonfuls of sugar in each of the test tubes. Add a spoonful of yeast in test tube B, Inflate the two balloons incompletely. Now tie the balloons on the mouths of each test tube. Keep them in a warm place, away from sunlight. Watch the setup every day for next 3-4 days. Record your observations and think of an explanation.
Now take another test tube filled 1/4 with lime water. Remove the balloon from test tube B in such a manner that gas inside the balloon does not escape. Fit the balloon on the test tube and shake well. Observe and explain.
Q 26 – Classify bacteria on the basis of their shapes.