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2.

When was the structure of DNA discovered?

1942
1953
1962
1963

Correct Answer

A. 1953

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.

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3.

How large is a typical bacterium?

1 mm
1 nanometer
1 micrometer
1 picometer

Correct Answer

A. 1 micrometer

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.

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4.

Biocon was founded in Bangalore in the year

1971
1975
1978
1985

Correct Answer

A. 1978

Explanation

Biocon was founded in Bangalore in the year 1978.

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5.

Upon which substance are bacteria not able to live?

Milk
Pesticides
Teflon
Acetone

Correct Answer

A. Teflon

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.

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When was the structure of DNA discovered?

How large is a typical bacterium?

Biocon was founded in Bangalore in the year

Upon which substance are bacteria not able to live?