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1. What is the living Organism make to use cheese?

Rennet

Milk

Bacteria and some fungi

Bacteria and some fungi are living organisms that are used to make cheese. These organisms play a crucial role in the cheese-making process. Bacteria are responsible for acidifying the milk, which helps in coagulating the milk proteins. This coagulation is necessary to form curds, which are then pressed and aged to create cheese. Some fungi, such as Penicillium, are used to develop the characteristic flavors and textures of certain types of cheese. Therefore, bacteria and fungi are essential in the production of cheese.

Explanation

Bacteria and some fungi are living organisms that are used to make cheese. These organisms play a crucial role in the cheese-making process. Bacteria are responsible for acidifying the milk, which helps in coagulating the milk proteins. This coagulation is necessary to form curds, which are then pressed and aged to create cheese. Some fungi, such as Penicillium, are used to develop the characteristic flavors and textures of certain types of cheese. Therefore, bacteria and fungi are essential in the production of cheese.

2. When was the structure of DNA discovered?

1942

1953

1962

1963

In 1953, the structure of DNA was discovered. This breakthrough discovery was made by James Watson and Francis Crick, along with the help of Rosalind Franklin's X-ray crystallography images. They proposed the double helix structure of DNA, which is the fundamental basis for understanding how genetic information is stored and transmitted. This discovery revolutionized the field of genetics and laid the foundation for modern molecular biology.

Explanation

In 1953, the structure of DNA was discovered. This breakthrough discovery was made by James Watson and Francis Crick, along with the help of Rosalind Franklin's X-ray crystallography images. They proposed the double helix structure of DNA, which is the fundamental basis for understanding how genetic information is stored and transmitted. This discovery revolutionized the field of genetics and laid the foundation for modern molecular biology.

3. How large is a typical bacterium?

1 mm

1 nanometer

1 micrometer

1 picometer

A typical bacterium is approximately 1 micrometer in size. Bacteria are microscopic organisms that can only be seen under a microscope. They are much smaller than a millimeter, nanometer, or picometer. A micrometer, also known as a micron, is equal to one millionth of a meter. This size is typical for bacteria, which are single-celled organisms that can have various shapes and structures.

Explanation

A typical bacterium is approximately 1 micrometer in size. Bacteria are microscopic organisms that can only be seen under a microscope. They are much smaller than a millimeter, nanometer, or picometer. A micrometer, also known as a micron, is equal to one millionth of a meter. This size is typical for bacteria, which are single-celled organisms that can have various shapes and structures.

4. Biocon was founded in Bangalore in the year

1971

1975

1978

1985

Biocon was founded in Bangalore in the year 1978.

Explanation

Biocon was founded in Bangalore in the year 1978.

5. Upon which substance are bacteria not able to live?

Milk

Pesticides

Teflon

Acetone

Bacteria are not able to live on teflon because it is a non-stick material that is resistant to microbial growth. Teflon has a smooth surface that prevents bacteria from adhering to it, making it an inhospitable environment for bacterial survival. Unlike milk, which is a nutrient-rich medium for bacterial growth, and pesticides, which may have toxic effects on bacteria but still allow some survival, teflon provides no favorable conditions for bacteria to thrive. Acetone, although it can kill some bacteria, is not the correct answer because it does not completely prevent bacterial growth like teflon does.

Explanation

Bacteria are not able to live on teflon because it is a non-stick material that is resistant to microbial growth. Teflon has a smooth surface that prevents bacteria from adhering to it, making it an inhospitable environment for bacterial survival. Unlike milk, which is a nutrient-rich medium for bacterial growth, and pesticides, which may have toxic effects on bacteria but still allow some survival, teflon provides no favorable conditions for bacteria to thrive. Acetone, although it can kill some bacteria, is not the correct answer because it does not completely prevent bacterial growth like teflon does.