Single Cell Protein

Q. Assertion : Spirulina can help to reduce environmental pollution.
Reason : Spirulina can be easily grown on straw, molasses, waste water from potato processing plant, sewage, etc.

1. Both assertion and reason are true and reason is the correct explanation of the assertion
2. Both reason and assertion are true, and the reason is not the correct explanation of the assertion
3. Assertion is a true statement but reason is false
4. Both assertion and reason are false

Q. Which of the following is/are example(s) of SCP?

1. Bread mould
2. E. coli
3. Spirulina
4. Methylophilus methylotrophus

Q.

Which one of the following organisms is scientifically correctly named, correctly printed according to the international rules of nomenclature and correctly described?

1. Plasmodium falcipartim - A protozoa pathogen causing the most serious type of malaria.

2. Fells tigris - The Indian tiger, well protected in Gir forests.

3. E.coli - Full name Entamoeba coli a commonly occurring bacterium in human intestine

4. Musca domestica - The common house lizard, a reptile.

Q.

Phytochrome is a:

1. Chromoprotein

2. Flavoprotein

3. Lipoprotein

4. Glycoprotein

Q.

Find out the role of microbes in the following and discuss it with your teacher.

(a) Single Cell Protein (SCP)

(b) Soil

Q.

Rennin used in the cheese industry is

1. Alkaloid

2. Antibiotic

3. Enzyme

4. Inhibitor

Q.

People recovering from long illness are often advised to include the alga Spirulina in their diet because it:

1. Is richest source of protein

2. Has antibiotic properties

3. Makes the food easy to digest

4. Restores the intestinal microflora

Q. Before inoculation into the culture media in tissue culture, the explant is sterilised by _________________.

1. autoclaving
2. treatment with 1% sodium hypochlorite
3. exposure to UV radiation
4. boiling in water for 10 minutes

Q.

Nif gene occurs in which of the following

1. Penicillium

2. Aspergillus

3. Streptococcus

4. Rhizobium

Q.

Is Azotobacter aerobic?

Q. Short / Long answer type questions.
Describe in brief the economic importance of bacteria.

Q. Which of the following statement(s) is/are not correct for single cell protein (SCP)?

(i) The biomass is obtained from unicellular
microorganisms only.
(ii) It provides a protein rich supplement.
(iii) SCP can be produced by using bacteria
and algae but not fungi.
(iv) It helps to minimise environmental
pollution.
(v) SCP has to be processed before use.

1. (i), (iii) and (iv)
2. (iii) only
3. (iv) only
4. (i) and (iii)

Q. An element that is present in the middle lamella of plant cell is

1. Cu
2. Zn
3. Ca
4. K

Q. Identify the set with a common feature.

1. Spirulina, Methylophilus, Amanita phalloides, Saccharomyces
2. Spirulina, Methylophilus, Chlorella, Saccharomyces
3. Spirulina, E. coli, Cladophora, Amanita phalloides
4. Spirulina, Methylophilus, Chlorella, Amanita phalloides

Q. Single cell proteins are rich sources of protein and are a good alternative. What are they?

1. Enzymes
2. Antibiotics
3. Toxins
4. Micro-organisms

Q. Protein content which is extracted from mixed or pure cultures of yeasts, bacteria, algae and fungi is called

1. Triple Cell Protein
2. Single Cell Protein
3. Double Cell Protein
4. Tetra Cell Protein

Q.

What are the benefits of proteases?

Q. What is SCP?

Q. Which of the following statement is/are not correct for single cell protein (SCP)?
(i) The biomass is obtained from unicellular microorganisms only.
(ii) It provides a protein rich supplement.
(iii) They can be grown easily on materials like waste water from potato processing plants, straw, manure, sewage etc.
(iv) It helps to minimise environmental pollution.
(v) SCP has to be processed before use.

1. (i), (iii) and (iv)
2. (iii) only
3. (iv) only
4. (i) only

Q. ____ and ____ are unicellular algae, rich in proteins, that are used as food supplements even by space travellers.

1. Porphyra, Spirogyra
2. Gelidium, Gracilaria
3. Chlorella, Spirulina
4. Laminaria, Spirogyra

Q. Which of the following statements is wrong for viroids?

1. They lack a protein coat
2. They are smaller than viruses
3. They cause infections
4. Their RNA is of high molecular weight

Q. All plant cells possess

1. Middle lamella
2. Centrioles
3. Primary wall
4. Lysosomes

Q. Which organism is used as a major source to obtain the single cell protein?

1. Bacteria
2. Yeast
3. None of the above
4. Filamentous fungi

Q. Write a note on Single Cell Protein (SCP).

Q.

Which of these is most commonly used for green manuring in India??

Q. Microbes can also be used as a source of energy. Substantiate with suitable examples.

Q. 250 Kg cow produces 200 g of protein/day, in the same period 250 g of Methylophilyus methylotrophus produce 25 tonnes of protein. Then what is single cell protein?

Q. Give two examples of fungi used in SCP production.

Q. Which non-toxic, fast growing cyanobacterium is cultivated in tanks as a protein-rich animal feed?

1. Stigonema
2. Spirulina
3. Nostoc
4. Oscillatoria

Q.

Find out the role of microbes in the following and discuss it with your teacher.

(a) Single cell protein (SCP)

(b) Soil