DNA

Question 1

What does DNA stand for?

Answer 1

Deoxyribonucleic acid

Question 2

True or False: DNA is a molecule that carries genetic instructions for the development, functioning, growth, and reproduction of all known living organisms and many viruses.

Answer 2

True

Question 3

Fill in the blank: DNA is composed of two long chains of nucleotides twisted into a double helix and held together by __________ bonds.

Answer 3

hydrogen

Question 4

What are the four nitrogenous bases found in DNA?

Answer 4

Adenine, Thymine, Guanine, Cytosine

Question 5

What is the process by which DNA is copied during cell division?

Answer 5

Semi-conservative replication

Question 6

What are the differences between RNA and DNA?

Answer 6

DNA:
Deoxyribose sugar
Double helix
Thymine

RNA:
Ribose sugar
Single stranded
Uracil

Both are polymers of nucleotides and have phosphodiester bonds

Question 7

What is the importance of retaining one original DNA strand?

Answer 7

-It ensures there is genetic continuity between generations of cells.
-Ensures new cells produced during cell division, inherit all their genes from their parent cells
-Body cells are replaced regularly.

Question 8

Contrast prokaryotic DNA and eukaryotic DNA

Answer 8

-Prokaryotic DNA are found in the cytoplasm where as eukaryotic DNA are found in the nucleus.
-Prokaryotic DNA are circular whereas eukaryotic DNA are linear.
- prokaryotic DNA is shorter than eukaryotic DNA.