DNA Structure and Function
Explore the fundamental structure and function of DNA, including its components, double helix shape, and role in heredity.
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DNA Structure and Function
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Read each question carefully and answer to the best of your ability. Show all your work where applicable.
1. Which of the following best describes the shape of a DNA molecule?
Single helix
Triple helix
Double helix
Linear strand
2. Which of the following are the three main components of a DNA nucleotide?
Sugar, phosphate, amino acid
Sugar, phosphate, nitrogenous base
Phosphate, lipid, nitrogenous base
Sugar, protein, nitrogenous base
3. The two strands of DNA are held together by bonds between the nitrogenous bases.
4. In DNA, adenine (A) always pairs with (T), and guanine (G) always pairs with (C).
5. The process by which DNA makes a copy of itself is called .
6. Describe the main function of DNA in living organisms.
7. How does the double helix structure of DNA contribute to its function?
8. Label the following diagram of a DNA double helix.
A:
B:
C:
D:
9. DNA is primarily found in the cytoplasm of eukaryotic cells.
True
False
10. RNA is a double-stranded molecule, similar to DNA.
True
False
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