Biology, Eighth Edition (Raven)

Chapter 3: The Chemical Building Blocks of Life

View the animation below, then complete the quiz to test your knowledge of the concept.


1.	The correct structure of DNA components can be presented as

		A)	phosphate–base–sugar.
		B)	phosphate–sugar–base.
		C)	base–phosphate–sugar.
		D)	phosphate–sugar–phosphate–base.
		E)	base–sugar–phosphate–base.

2.	Which of the following is a characteristic of double-stranded DNA?

		A)	2 nanometers in width
		B)	10 base pairs per turn
		C)	0.34 nanometers per basepair
		D)	A and B
		E)	A, B and C

3.	Which of the following DNA molecules is the most stable?

		A)	CTGCATAC GACGTATG
		B)	GAAATTTC CTTTAAAG
		C)	AGTCGAAT TCAGCTTA
		D)	GCGTGCAC CGCACGTG
		E)	GGATCCTG CCTAGGAC

4.	Doubled-stranded DNA consists of two antiparallel strands, meaning that one strand is oriented in the 5’ to 3’ direction, while the other is oriented in the 3’ to 5’ direction.

		A)	True
		B)	False

5.	Asymmetrical spacing of the backbones of the DNA double helix generates major and minor grooves.

		A)	True
		B)	False