MICROORGANISM

ROLE OF MICROORGANISM

Decaying process

1. Many bacteria help decompose (menguraikan) dead organism and animal wastes into chemical compound such as ammonia.

2. In sewage treatment plant ( loji rawatan kumbahan),

– bacteria are use to break down the complex animal and plant matter into simple compounds

ROLES MICROORGANISM IN DIGESTION

ONE OF THE MAIN COMPONENT OF PLANT IS CELLULOSE

• Cellulose is hard to digest by the animal….• How they digest the cellulose…?• Cellulose can be digest by enzyme named

cellulase.• How they can get cellulase?

FOOD DIGESTION

• Certain kinds of bacteria live in intestines of human (usus manusia) and other microorganism.

• Why they live in our intestines?• They help in digestion and destroy harmful

microorganism.

Where we can find this bacteria except in intestines ?

YOGURT YAKULT

AMMONIA

• Adds nitrogen into the soil (tanah)• The nitrogen fixing bacteria in the soil change

the ammonia into nitrates.

• This nitrates will be used by plants

Ammonia Nitrates

nitrogen fixing bacteria

Why plants need nitrates?

• They need nitrates to make amino acids

• But…………………………….• Pea and bean plants use bacteria Rhizobium

which directly convert nitrogen into acid amino

Nitrates Amino acids

Rhizobium bacteria• Live in plant roots

INDUSTRY

• Bacteria are used in the production of• Milk• Yogurt• Cheese • Vinegar • Soy sauce • Chocolate • Certain vitamin B• Citric acids

YEAST

Production of milk, yogurt n cheese

• Certain bacteria are used in the production of milk, yogurt and cheese.

• This process called as FERMENTATION