DNA: The Genetic Material

What did Griffith observe in his transformation experiments?

• Virulent bacteria changed into harmless bacteria

• Heat-killed bacteria changed into S bacteria

• Harmless bacteria changed into S bacteria

• Virulent S bacteria changed into harmless bacteria

In 1944, Avery conducted a series of experiments that showed the material responsible for transformation is...

• T2

• DNA

• Protein

• Bacteriophage

The work of Chargaff, Wilkins, and Franklin formed the basis for...

• Watson and Crick's DNA model

• Hershey and Chase's work on baceriophages

• Avery's work on transformation

• Griffith's discovery of transformation

At the end of the replication process, each of the two new DNA molecules is composed of which of the following?

• Two new DNA strands

• One new and one original DNA strand

• One new and one mutated DNA strand

• Two original DNA strands

What is the nitrogen base that forms hydrogen bonds with cytosine?

This is a virus that infects bacteria.

This is a long DNA molecule that contains about 100 replication forks during replication.

This substance is introduced into the body to produce immunity.

This enzyme opens up the double helix by breaking the hydrogen bonds that link complementary bases.

This is the shape of a DNA molecule in which two strands of DNA are twisted around each other, like a winding stair case