7.1 - DNA: The Genetic Material

T/F: Many people in the early 1900's believed protein was the genetic material instead of DNA.

• true

• false

Hershey and Chase decided to use radioactive phosphorus and sulfur for their experiments. Why did they use radioactive phosphorus and sulfur?

• Proteins contain phosphorus, while DNA does not, and DNA contains sulfur, while proteins do not.

• DNA and proteins both contain sulfur and phosphorus

• Proteins contain sulfur, while DNA does not, and DNA contains phosphorus, while proteins do not.

• Radioactive sulfur and phosphorus killed the bacteriophages upon entry to the bacteria they were infecting.

Tags

NGSS.HS-LS1-1

Which of these is not one of the nitrogenous bases in DNA nucleotides?

• cytosine

• uracil

• thymine

• adenine

​The orientation of the two DNA strands is _____ to one another.​

• parallel

• anti-parallel

• perpendicular

Which of the following are the rails (outside) of DNA composed of in an alternating fashion?

• deoxyribose and ribose

• deoxyribose and nitrogenous bases

• phosphate and deoxyribose

• phosphate and nitrogenous bases

If a DNA sample has 20% Thymine, how much would be Cytosine?

• 20%

• 30%

• 40%

• 80%

Who concluded that when one bacterium strand died, the other bacterium incorporated the dead bacterium's DNA and became that bacterial strand? (key - DNA caused the change)

• Hershey and Chase

• Oswald Avery

• Frederick Griffith

• Franklin and Wilkins

Who analyzed the amount of adenine, guanine, thymine, and cytosine of various species to conclude that the amount of A is equal to the amount of T and the amount of C is equal to the amount of G?

• Erwin Chargaff

• Oswald Avery

• Frederick Griffith

• Hershey and Chase

What are the basic building blocks of DNA and RNA?

• ribose

• nucleotides

• pyrimidines

• purines

Who used X-ray diffraction to determine that the shape of DNA was a double helix?

• Wilkins and Franklin

• Watson and Crick

• Hershey and Chase

• Oswald Avery