HARD
8th CBSE
IMPORTANT
Earn 100

CROSSWORD
Follow the clues and solve the terms you have learned.

Across:

1. Organisms that are visible only through a microscope.

3. The process of treating and handling food with an aim to stop or slow down its spoilage while maintaining its nutritional value, texture, and flavour. (4, 12)

4. Substances that prevent the spoilage of foodstuffs due to undesirable chemical changes or microbial growth.

5. The smallest microorganism, which can develop only inside the cells of a host organism.

 

Down:

2. Diseases caused by microbes that can spread from an infected person to a healthy person through air, water, food, or physical contact. (12, 8)

4. A group of animal-like, single-celled microorganisms.

6. An insect that transmits disease-causing microbes to human beings, without itself suffering from them.

7. A rod-shaped bacterium that sours milk and is used for making curd from milk.

Question Image

Important Questions on Micro-Organisms: Friend and Foe

EASY
8th CBSE
IMPORTANT

Fill in the blank from the given options below:

_____ are used in the production of alcohol.

(Nitrogen, Lactobacillus, Viruses, Amoeba, Yeast)

EASY
8th CBSE
IMPORTANT

Fill in the blank from the given options below:

_____ reproduce only inside the cell of a host organism.

(Lactobacillus, Viruses, Amoeba, Yeasts, Fungi)

MEDIUM
8th CBSE
IMPORTANT

Fill in the blank from the given options below:

Nitrogen Lactobacillus Viruses Amoeba Pasteurisation Water Drying raisins Fungi Salting

Microorganisms such as _____ can live alone.

EASY
8th CBSE
IMPORTANT

Fill in the blank from the given options below:

(Nitrogen, Lactobacillus, Viruses, Amoeba, Yeasts, Water, Drying, raisins, Fungi, Pasteurisation, Salting)

_____ sours milk and converts it into curd.

EASY
8th CBSE
IMPORTANT

Fill in the blank from the options given in the bracket:

The process of heating milk to high temperature and cooling it rapidly is called_____.

(Nitrogen, Lactobacillus, Viruses, Amoeba, Yeasts, Water, Drying, raisins, Fungi, Pasteurisation, Salting)

EASY
8th CBSE
IMPORTANT
Fill in the blank from the given options below:
(Nitrogen, Lactobacillus, Virus, Amoeba, Yeasts, Water, Drying, raisins, Fungi, Pasteurisation, Salting)
Hepatitis B spreads through _____.
EASY
8th CBSE
IMPORTANT

Fill in the blank from the given options below:

_____ lack chlorophyll and feed on decaying matter.

(Nitrogen, Lactobacillus, Viruses, Amoeba, Yeasts, Water, Drying, raisins, Fungi, Pasteurisation, Salting)

MEDIUM
8th CBSE
IMPORTANT

Fill in the blank from the given options below:

_____ is used by plants for the synthesis of plant proteins and other compounds.

(Nitrogen, Lactobacillus, Viruses, Amoeba, Yeasts, Water, Drying, raisins, Fungi, Pasteurisation, Salting)