Microorganisms

Q.

Write the advantages and disadvantages of microbes.

Q.

What are the 5 conditions required for bacterial growth?

Q.

Who proposed the cell theory and explain the theory? Also, name the scientist who expanded this theory.

Q.

Cell theory was given by :

1. Schleiden and Schwann

2. Hooke

3. Virchow

4. Hackel

Q.

Write advantages and disadvantages of bacteria.

Q.

What are biopesticides? Name any two biopesticides.

Q. What is the size of a bacteria?

Q.

What is hypersensitivity?

Q.

Are humans prokaryotes or eukaryotes?

Q.

What are the characteristics of pathogenic microorganisms?

Q.

What are micro-organisms ? Give any two examples of micro-organisms .

Q.

What are the exceptions to cell theory?

Q.

Explain the uses of bacteria, fungi and algae

Q.

(a) How do micro-organisms help in increasing soil fertility ?

(b) How do micro-organisms help in cleaning the environment ?

Q. Name the locomotory organ of the organism given in the diagram below.

1. Flagella
2. Limbs
3. Psuedopodia
4. Cilia

Q.

The most abundant microorganism are: -

1. Virus

2. Bacteria

3. Paramecium

4. Amoeba

Q.

(a) Name any five human diseases caused by micro-organisms.Also name the causative micro-organisms and mode of transmission for each of these diseases.

(b) State the various ways of preventing the occurrence and spreading of communicalbe disease.

Q. Francesco Redi experimentally proved

1. Abiogenesis
2. Biogenesis
3. Spontaneous origin of life
4. None of the above

Q.

Who modified cell theory?

Q.

What are the types of cells based on the presence or absence of nucleus?

1. Prokaryotes

2. Eukaryotes

3. Both A and B

4. Either A or B

Q.

Which one of the following equipment is essentially required for growing microbes on a large scale for industrial production of enzymes?

1. BOD incubator

2. Sludge digester

3. Industrial oven

4. Bioreactor

Q.

What are $4$ examples of prokaryotic cells?

Q.

Which of the following is NOT a vector-borne disease?

1. Malaria

2. Diabetes

3. Dengue

4. Plague

Q. State whether the following statements are true or false.
Statement 1: Microorganisms are always harmful in nature.
Statement 2: Harmful microbes are the causative agents of diseases.

Q.

What are the principles of cell theory? Describe it.

Q.

______ is a marine algae used as food.

Q.

What are animalcules?

Q.

Name the instrument used to see microorganisms.

Q.

Suggest a suitable word for each of the following statements.

(a) Chemicals added to food to prevent the growth of microorganisms.

(b) Nitrogen-fixing microorganisms present in the root nodules of legumes.

(c) The agent spreads pathogens from one place to another.

(d) Chemicals which kill or stop the growth of pathogens.

Q.

To which category of micro-organisms do the following belong ?

Amoeba, Lactobacillus, Chamydomonas, Penicillium, Yeast, HIV