Biology: DNA Structure and History

What does DNA stand for?

• Deoxyribonucleic acid
• Denitrogenous acid
• Deribonucleic acid
• Diribonucleic acid

Which two scientists are given the credit for discovering the structure of DNA?

• Watson and Crick

• Chargoff and Franklin

• Wilkins and Crick

• Crick and Franklin

DNA is a polymer, which means it's made up of many repeating single units (monomers). What are the monomers of DNA?

• Carbon

• Nucleotides

• Hydrogen Bonds

• Nucleic Acids

The "backbone" of DNA, the sides of the twisted latter, is made up of two components. What are these?

• Hydrogen and Carbon

• Adenine and Thymine

• Sugar and Phosphate

• Nitrogenous Base and Sugar

Tags

NGSS.HS-LS1-1

Which of these is not a possible nitrogenous base in a DNA molecule?

• Adenine

• Thymine

• Guanine

• All of these are possible bases

What ingredients would I need in order to create a nucleotide for DNA?

• Deoxyribose sugar

• Phosphate group

• Nitrogenous base

• All of these are needed

Mr. Erwin Chargaff is credited for discovering the property of base pairing in DNA. When studying DNA, he noticed that certain nitrogenous bases liked pairing with each other. Which of these base pairings is correct?

• Cytosine and Guanine

• Adenine and Thymine

• Both of these are correct

• None of these are correct

The base pairs are held together by weak attractive forces that allow DNA to separate or unzip itself when it is time for replication. What do we call these bonds between nitrogenous bases?

• Covalent Bonds

• Hydrogen Bonds

• Filial Bonds

• Phosphodiester Bonds

Watson and Crick were only able to determine the shape of DNA after being shown an X-ray diffraction image of DNA that was taken by a female colleague of theirs. What is her name?

• Rosalind Franklin

• Rachel Carson

• Mae Jemison

• Marie Curie

Which of these would be the complementary sequence of nitrogenous bases to the following DNA strand: AGGTCA

• GAACTA

• TCCAGT

• CTTGCC

• None of these are correct