In Fred Griffith's Experiments, Harmless R Strain Pneumococcus Became Lethal

question 13

Multiple Choice

In Fred Griffith's experiments, harmless R strain pneumococcus became lethal S strain pneumococcus as the result of which of the following?
1) horizontal gene transfer
2) transduction
3) conjugation
4) transformation
5) genetic recombination

• A) 2 only
• B) 4 only
• C) 2 and 5
• D) 1, 3, and 5
• E) 1, 4, and 5

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Definitions:

Gray Iron

A type of cast iron characterized by its graphitic microstructure, which gives it good machinability and vibration damping properties.

Flask

In manufacturing, often refers to a container or casing used in the process of forming metal castings.

Drag

A force acting opposite to the relative motion of any object moving with respect to a surrounding fluid; it also describes the resistance an object encounters while moving through a fluid (like air or water).

Cope

In construction and metalworking, to shape the end of a beam or metal profile so that it fits the contours of another for a joining process.