DNA History and Structure

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

Erwin Chargaff discovered what feature regarding DNA

• The Helical structure
• The constant ratio of the bases
• The Sugar-Phosphate Backbone
• The length of a strand of DNA

The work of scientists including Griffin, Avery, Hershey & Chase and Franklin helped us to determine the __ are responsible for carrying genetic material.

• Amino Acids
• Proteins
• Nucleic Acids
• Carbohydrates

Which of the following is a base that is NOT contained in DNA?

• Adenine
• Thymine
• Uracil
• Guanine

DNA is copied during

• Translation
• Transcription
• Reproduction
• Replication

Tags

NGSS.HS-LS3-2

Who is responsible for producing this image?

• Francis Crick
• James Watson
• Rosalind Franklin
• Watson and Crick

What does this image show?

• Double Helical Structure of DNA
• Triple Helical Structure of DNA
• I don't know, is that a Rorschach test?
• The image is inconclusive

Tags

NGSS.HS-LS1-1

What are the chemical components of DNA?

• A phosphate, nitrogenous base, and an amino acid
• A nitrogenous base, a sugar, and an amino acid
• A phosphate, a sugar, and a nitrogenous base
• A nitrogenous base, sugar, and a helix

The two strands of DNA are held together by what type of bond?

• Ionic
• Covelant
• Polar
• Hydrogen