Homework Engagement g8

Answer the next 4 questions based on this information

"A farmer notices that his crop yield improved after using a biofertilizer containing Rhizobium."

a. What is the role of Rhizobium in plants?

• Fix atmospheric Nitrogen into plant soluble forms

• Decompose dead and dying plants

The plants associated with them are called _________Plants .

How does this help reduce the use of chemical fertilizers?

• farmers don’t have to rely as much on synthetic nitrogen fertilizers.

• Clean up the environment

• Add flavour to the food

• All of the above

Which of the following pairs is incorrectly matched?

• Yeast – Baking industry

• Lactobacillus – Curd formation

• Plasmodium – Typhoid

• Rhizobium – Nitrogen fixation

Riya left some bread in a damp corner of her kitchen. After a few days, she saw green patches growing on it. Which microorganism most likely grew there?

• Bacteria

• Algae

• Fungi

• Protozoa

A bakery owner adds yeast to dough while making bread. What is the main function of yeast here?

• To add sweetness to the dough

• To make bread soft and fluffy by producing carbon dioxide

• To increase protein content of bread

• To prevent bread from spoiling

Which type of microorganism is responsible for turning boiled milk sour when left outside?

• Virus

• Protozoa

• Fungi

• Bacteria

The sour taste in spoiled milk is due to the production of:

• Acetic acid

• Hydrochloric acid

• Lactic acid

• Sulphuric acid

Which method can best prevent milk from turning sour quickly?

• Adding sugar
  

• Boiling and refrigerating
  

• Keeping it in sunlight
  

• Adding salt

The process of milk turning sour is used in the food industry for preparing:

• Soft drinks
  

• Bread and cakes
  

• Curd and cheese

• Pickles