Question

Question 1a

Frederick Griffith is known for a classic experiment carried out in 1928. He identified the action of a hereditary biomolecule when he observed...

	a.	isolation of pure DNA molecules from a bacterial cell using detergents and alcohol to spool out a long mucus-like mass.
	b.	a phenotypic change, a transformation, of a bacteria that formed a rough colony (R strain) into bacteria that formed a smooth colony (S strain) when the R strain was exposed to dead S strain bacteria.
	c.	the ability of heat to reduce the bacterial load in foods and beverages.
	d.	an increase in the rate of growth (r) of bacterial cells when exposed to different sugar (s) molecules.
	e.	the rapid (r) death of mice following injection with a mixture of several bacterial species (s).

Question 1b

To earn full credit for this question, you may need to select more than one answer. Incorrect answers will deduct from the points for this question.

Hereditary material must have three key properties for its genetic function. Which of the following answers are properties that must be displayed by hereditary material?

	a.	The structural features of the hereditary material must allow it to be enzymatically active and capable of mediating cellular metabolism.
	b.	The hereditary material must be composed of unusually rare and unusual elements.
	c.	The structural features of the hereditary material must be complex enough to hold informational content.
	d.	The structural features of the hereditary material must allow for faithful replication.
	e.	The structural features of the hereditary material must allow for and tolerate small changes that would facilitate nonlethal variation.
	f.	The structural features of the hereditary material must allow for it to function both intracellularly and extracellularly.

Answer 1

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