The monomers of nucleic acids are nucleotides. A nucleotide has three components. Identify the components.

• A = Phosphate Group

  B = 5-Carbon Sugar

  C = Nitrogenous Base

• A = Nitrogenous Base

  B = Phosphate Group

  C = 5-Carbon Sugar

• A = Phosphate Group

  B = Nitrogenous Base

  C = 5-Carbon Sugar

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NGSS.HS-LS1-1

What are the base pairing rules in deoxyribonucleic acid (DNA)?

• A pairs with T

  C pairs with G

• A pairs with C

  T pairs with G

• A pairs with G

  T pairs with C

Tags

NGSS.HS-LS1-1

In 1950, Erwin Chargaff discovered that the percentage of adenine in DNA equals the percentage of thymine, and that the percentage of cytosine equals the percentage of guanine. This proved invaluable to the eventual discovery of which aspect of DNA?

• Location

• Solubility

• Structure

• Volume

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NGSS.HS-LS1-1

What did Rosalind Franklin contribute to the understanding of DNA molecules?

• An image indicating the shape of a DNA molecule

• An analysis of the chemical makeup of a DNA molecule

• A thought that DNA carries genetic information

• A theory about how DNA conveys genetic information

Tags

NGSS.HS-LS1-1

In 1952, Rosalind Franklin obtained this image of DNA using X-ray crystallography. Scientists used this image to conclude that the shape of DNA is best described as a −

• ladder

• double helix

• triple helix

• line

Tags

NGSS.HS-LS1-1

In 1953, these two scientists published a paper describing the shape of a DNA molecule. Which two scientists are given credit for the discovery of the structure of DNA?

• Lamarck and Darwin

• Newton and Einstein

• Franklin and Wilkins

• Watson and Crick

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NGSS.HS-LS1-1

The model of DNA used today was proposed by James Watson and Francis Crick in 1953. In this model, what sequence of bases would be complementary to A-G-C-T-A?

• A-G-C-T-A

• C-G-C-A-T

• A-T-C-G-A

• T-C-G-A-T

What type of bond occurs between the two nitrogenous bases (W and X) that holds the two strands of the DNA together?

• Hydrogen Bond

• Covalent Bond

• Ionic Bond

• Peptide Bond

• James Bond

Tags

NGSS.HS-LS1-1

What type of bond occurs between the sugar and phosphate group (Y and Z)? This makes up the sugar phosphate backbone of DNA.

• Hydrogen Bond

• Covalent Bond

• Ionic Bond

• Peptide Bond

• James Bond

Tags

NGSS.HS-LS1-1

During DNA replication, which enzyme is responsible for unzipping the double helix by breaking the hydrogen bonds between the nitrogenous bases?

• Polymerase

• Ligase

• Helicase

• Primase