Question

4. A person cannot see a single cotton thread 100 feet away, but if you wound thousands of threads together into a rope, it would be visible much further away. Is this statement analogous to our DNA extraction? Explain. 5. Why is it important for scientists to be able to remove DNA from an organism? List two reasons. Bu Sesuencing the cells and 6. Is there DNA in your food? How do you know?

Answer 1

4 ans) Yes this statement is analogous, single thread from far distance is not visible to naked eye because of its very thin narrow size in the same way DNA is also not seen because DNA size is in micron range, so DNA is not visible to naked eyes. When lakhs together DNA's are arranged side by side forming a bundle like human hair DNA can be seen. Spooling is a process of collecting large number of DNA together.

5 ans) It is important for scientists to extract DNA from an orgaisms, because one can study, alter its structure, and group based on property of the DNA.

Two reasons:

• To identify genetic disease and mutations in genetic makeup.
• To discover drugs and vaccine for treating disorders by manipulating the DNA composition.

6 ans) Yes, DNA is present in our food.

DNA is present in all living cells, because the food we eat such as fish, egg, plants contain cells this justifies that DNA is present in our food.

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