Question

What was the key finding from Griffith's experiments using live and heat-killed pathogenic bacteria? a. Bacteria with a smooth coat could kill mice. b. Bacteria with a rough coat are not lethal. c. DNA is the genetic material. d. Genetic material can be transferred from dead to live bacteria.

Name: Problem 1, Chapter 14: Biology
Uploaded: 2020-05-17T19:03:08-08:00
Duration: 4 min 13 s
Channel: Candice Chiu
Description: What was the key finding from Griffith's experiments using live and heat-killed pathogenic bacteria? a. Bacteria with a smooth coat could kill mice. b. Bacteria with a rough coat are not lethal. c. DNA is the genetic material. d. Genetic material can be transferred from dead to live bacteria.

   What was the key finding from Griffith's experiments using live and heat-killed pathogenic bacteria?
a. Bacteria with a smooth coat could kill mice.
b. Bacteria with a rough coat are not lethal.
c. DNA is the genetic material.
d. Genetic material can be transferred from dead to live bacteria.

Biology

Peter H. Raven,… 11th Edition

Chapter 14, Problem 1

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Solved by Expert Candice Chiu

05/17/2020

Step 1

The mouse died, proving that the virulent strain was indeed harmful. This corresponds to option (a), but it is not the key finding of the experiment. Show more…

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What was the key finding from Griffith's experiments using live and heat-killed pathogenic bacteria? a. Bacteria with a smooth coat could kill mice. b. Bacteria with a rough coat are not lethal. c. DNA is the genetic material. d. Genetic material can be transferred from dead to live bacteria.

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Key Concepts

Bacterial Transformation

This concept refers to the process by which bacteria incorporate external genetic material from their environment, thereby altering their characteristics. It is a key mechanism in the horizontal transfer of genes among bacterial populations.

Genetic Material Transfer

The realization that genetic information can be passed from one cell to another through extracellular sources was revolutionary. Griffith’s experiments hinted at this transfer, which was later confirmed to involve DNA, thereby reinforcing the role of genetic material in heredity.

Griffith's Experiment

This was an early demonstration of the phenomenon of transformation, where harmless bacteria were converted into harmful forms after exposure to material from dead, virulent bacteria. The experiment showed that some 'transforming principle' from the dead cells could modify the live cells, setting the stage for later discoveries.

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