DNA & Replication

What role did bacterial viruses play in the study of genetics?

• They were used to clone genes

• They helped identify genetic material

• They disproved the role of DNA in heredity

• They were used to create vaccines

What is the role of DNA?

• It is the primary source of energy for cells

• It is involved in the synthesis of proteins

• It is the molecule responsible for heredity

• It helps in the digestion of food

Tags

NGSS.MS-LS3-1

NGSS.MS-LS3-2

What occurred when mice were injected with a mixture of heat-killed disease-causing bacteria (S type) and harmless bacteria (R type)?

• Mouse lives

• Mouse dies of pneumonia

• Mouse transforms

• No change in mouse health

According to Griffith's 'transforming principle', what was the nature of the material that could change harmless bacteria into deadly bacteria?

• A chemical compound.

• A type of virus.

• Some kind of information.

• A form of radiation.

What did the qualitative tests in Avery's experiments show?

• DNA was absent

• Only DNA-degrading enzymes stopped transformation

• DNA was present

• Transformation was not affected by enzymes

What is a bacteriophage?

• A kind of bacteria that infects viruses

• A kind of virus that infects bacteria

• A protein that infects bacteria

• A type of antibiotic

What was the outcome when bacteriophages with phosphorus-32 in DNA infected bacteria?

• No radioactivity inside bacterium

• Radioactivity inside bacterium

• Bacterium became immune to viruses

• Bacterium replicated the viral DNA

What was confirmed as the genetic material according to the Hershey-Chase Experiment?

• RNA

• Protein

• DNA

• Lipids

What is one of the roles of DNA as depicted in the image?

• DNA transmits electrical signals.

• DNA stores genetic information.

• DNA serves as a structural component of cell walls.

• DNA acts as a source of energy for cells.

According to the image, what must DNA do every time a cell divides?

• DNA must mutate to create diversity.

• DNA must move to a different part of the cell.

• DNA must make an exact copy of itself.

• DNA must dissolve and be recreated.