One Gene-One Enzyme

Beadle and Tatum used ...................... in their experiment, looking for evidence that a gene code for an enzyme

• Bacteria

• animal cell

• plant cell

• bread mold

Which step of the Beadle and Tatum Neurospora mold experiment is shown in the diagram?

• The mutant strains are tested to see if the damaged genes can be fixed by one amino acid or enzyme.

• The mutant strains are tested for growth in a medium that has nothing but one amino acid or vitamin.

• The mutant strains are tested for growth in a medium supplemented with one amino acid or vitamin.

• The mutant strains are tested for growth on minimal medium lacking in one amino acid or enzyme.

which of the following enzyme functions was the focus of the Beadle and Tatum experiments?

• Enzymes break down toxins (harmful substances) so that cells can get rid of them.

• Enzymes break down complex sugars so that cells can use them for energy.

• Enzymes convert simple substances into essential amino acids and vitamins.

• Enzymes initiate the transcription of mRNA from DNA by binding to a promoter.

Beadle and Tatum Knew that if they exposed Neurospora spores to ................ , they could cause ................... in genes.

• X - rays , Sunlight

• Replication, enzymes

• replication, translation

• X - rays, mutation

Tags

NGSS.HS-LS3-2

The first step in Beadle and Tatums experiment was to grow spores of Neurospora, a bread mold, on a .................. with no amino acids.

• complete medium

• minimal medium

• amino acids

Tags

NGSS.HS-LS1-6

What hypothesis did George Beadle and Edward Tatum present?

• Each gene codes for a single enzyme.

• Each gene codes for multiple enzymes.

• Radiation damages genes responsible for enzymes.

• Mutations in genes cause metabolic disorders.

Tags

NGSS.HS-LS1-1