DNA Review

What is the basic structural unit of DNA?

• Protein

• Nucleotide

• Lipid

• Carbohydrate

Which of the following is NOT a component of a nucleotide?

• Phosphate group

• Ribose sugar

• Nitrogenous base

• Deoxyribose sugar

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NGSS.HS-LS1-1

Describe the shape of the DNA molecule.

• Single helix

• Double helix

• Triple helix

• Linear strand

Which nitrogenous base pairs with adenine in DNA?

• Cytosine

• Guanine

• Thymine

• Uracil

How does the structure of DNA facilitate its function in storing genetic information?

• Its double helix structure allows for easy access to genetic codes.

• Its sequence of bases encodes genetic information.

• Its sugar-phosphate backbone provides stability.

• Its ability to form proteins directly.

Tags

NGSS.HS-LS1-1

Which arrow is pointing to the nitrogenous base?

Tags

NGSS.HS-LS1-1

Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for traits of all living things
• because we eat it every day for energy

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Using the labels, identify the parts of a DNA molecule.

c

d

e

f

b

a

Phosphate

Nucleotide

Base pair

Hydrogen bond

Nitrogen Base

Deoxyribose sugar

Predict what would happen if a DNA molecule had a mismatched base pair during replication.

• The DNA would replicate normally.

• The mismatch would be corrected by repair enzymes.

• The DNA would become a protein.

• The cell would immediately die.

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NGSS.HS-LS3-2

Do all organisms contain DNA? What is the main difference between a prokaryotic and eukaryotic cell?