Biology 12.1-12.2: DNA: The Genetic Material

True or False: The discovery that DNA is the genetic code involved one key experiment.

• True

• False

These are the subunits of nucleic acids; consist of a five-carbon sugar, a phosphate group, and a nitrogenous base.

• Purine

• Guanine

• Nucleotides

• Cytosine

Form of DNA; twisted ladder shape

• Helix

• Double Helix

• Structure

• Chromosome

This is the repeating subunit of chromatin fibers, consisting of DNA coiled around histones.

• Chromatids

• Nucleotides

• Double Helix

• Nucleosome

This/These scientist(s) had the first major experiment that led to the discovery of DNA as the genetic material in 1928.

• Mendel

• Griffith

• Avery

• Hershey and Chase

True or False: Early on in the 1900s, scientists knew that the two main components of chromosomes are DNA and protein.

• True

• False

What did Griffith's experiment with two strains of bacteria set the stage to search for?

• Identify the transforming substance in the bacteria.

• Why a mouse died when injected with bacteria.

• How to change bacteria from one strain to another.

• DNA structure

Tags

NGSS.HS-LS1-1

NGSS.HS-LS4-1

This/These scientist(s) identified the molecule that transformed the R strain of bacteria into the S strain.

• Mendel

• Griffith

• Avery

• Hershey and Chase

This/These scientist(s) published results in 1952 of experiments that provided definitive evidence that DNA is the transforming factor.

• Mendel

• Griffith

• Avery

• Hershey and Chase

Hershey and Chase used this technique to trace the fate of the DNA and protein in their experiment as the bacteriophages infected bacteria and reproduced.

• X-Ray Diffraction

• Orientation Tracking

• Radioactive Labeling

• Marking