Identifying the Substance of the Gene

What was the importance of Griffith's experiment?

What was the importance of Avery's experiment?

• Avery's experiment demonstrated that DNA is the substance that causes bacterial transformation.

• Avery's experiment proved that proteins are responsible for genetic inheritance.

• Avery's experiment showed that RNA is the hereditary material in cells.

• Avery's experiment established that lipids are the main carriers of genetic information.

What was the importance of the Hershey-Chase experiment?

• The Hershey-Chase experiment confirmed that DNA, not protein, is the genetic material.

• It proved that proteins are the carriers of genetic information.

• It demonstrated that RNA is the genetic material in all organisms.

• It showed that lipids are responsible for heredity.

What clues did bacterial transformation yield about the gene?

• It showed that genes are made of proteins.

• It showed that genes are made of DNA.

• It showed that genes are made of lipids.

• It showed that genes are made of carbohydrates.

Why was Griffith surprised when the mice injected with both harmless and heat-killed bacteria developed pneumonia and died?

• Because he expected the harmless and heat-killed bacteria to be non-lethal.

• Because he thought the heat-killed bacteria would revive.

• Because he believed the mice were immune to all bacteria.

• Because he used the wrong type of mice.

What does a bacteriophage inject into a bacterial cell?

• Protein

• DNA

• RNA

• Lipids

Fill in the blank: The process in which one strain of bacteria is changed by a gene or genes from another strain of bacteria is called _________.

• transformation

• transcription

• translation

• replication

What part of the bacteriophage gets injected into a bacterial cell?

• DNA

• Capsid

• Tail fibers

• Protein coat

What part of the bacteriophage attaches and anchors itself to the bacteria?

• Tail fibers

• Capsid

• DNA

• Head

What type of organism is a bacteriophage? Circle your answer.

• bacteria

• virus

• eukaryote