1. What is microbial biomass in the context of single-cell protein?
A.
The total mass of microorganisms grown as a food source
B.
The mass of minerals present in soil
C.
The amount of water in a fermentation vessel
D.
The mass of plant roots used for food
Correct Answer:
The total mass of microorganisms grown as a food source
Explanation:
Microbial biomass refers to the total mass of microorganisms such as yeast, bacteria, algae, or fungi produced for use as food or feed.
2. Which organism can be used to produce microbial biomass for single-cell protein?
A.
Yeast
B.
Earthworm
C.
Mango tree
D.
Fish
Correct Answer:
Yeast
Explanation:
Yeast is a microorganism that can be grown in large quantities to produce microbial biomass rich in nutrients.
3. Microbial biomass used as single-cell protein is mainly obtained by growing microorganisms in a:
A.
Suitable nutrient medium
B.
Dry stone surface
C.
Closed seed coat
D.
Metal container without nutrients
Correct Answer:
Suitable nutrient medium
Explanation:
Microorganisms are grown in a nutrient-rich medium so that they multiply and form microbial biomass.
4. Which of the following is a source of microbial biomass?
A.
Algae
B.
Wood
C.
Cotton fibre
D.
Sand
Correct Answer:
Algae
Explanation:
Algae are microorganisms that can be cultivated to produce biomass containing proteins and other nutrients.
5. A major nutritional component of microbial biomass used as single-cell protein is:
A.
Protein
B.
Plastic
C.
Wax
D.
Rubber
Correct Answer:
Protein
Explanation:
Microbial biomass is valued as single-cell protein because it generally contains a high amount of protein.
6. Which microorganism is commonly associated with the production of microbial biomass?
A.
Bacteria
B.
Butterfly
C.
Fern
D.
Moss plant
Correct Answer:
Bacteria
Explanation:
Bacteria can multiply rapidly on suitable substrates and are therefore important sources of microbial biomass.
7. Why is microbial biomass considered useful as a food or feed source?
A.
It can provide protein and other nutrients
B.
It contains only water
C.
It prevents all microbial growth
D.
It is made entirely of minerals
Correct Answer:
It can provide protein and other nutrients
Explanation:
Microbial biomass can supply proteins, vitamins, and other nutrients, making it useful as food or animal feed.
8. Which group is included among organisms that may form microbial biomass?
A.
Fungi
B.
Reptiles
C.
Flowering plants
D.
Mammals
Correct Answer:
Fungi
Explanation:
Fungi such as certain yeasts and filamentous fungi can be cultivated to produce nutrient-rich microbial biomass.
9. The rapid multiplication of microorganisms helps in the production of:
A.
Large amounts of microbial biomass
B.
Large amounts of soil particles
C.
Large amounts of plant seeds
D.
Large amounts of animal bones
Correct Answer:
Large amounts of microbial biomass
Explanation:
Microorganisms multiply quickly under suitable conditions, allowing large quantities of microbial biomass to be produced in a short time.
10. Which statement about microbial biomass is correct?
A.
It is the collected mass of microorganisms grown for useful products
B.
It is the mass of sunlight absorbed by plants
C.
It is the mass of empty culture containers
D.
It is the mass of oxygen in the atmosphere
Correct Answer:
It is the collected mass of microorganisms grown for useful products
Explanation:
Microbial biomass is the harvested mass of microorganisms cultivated for purposes such as producing single-cell protein.
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