Biology, Eighth Edition (Raven)

Chapter 3: The Chemical Building Blocks of Life

Pre Test

1
Why is carbon so important in biological systems? (p. 34)
A)Carbon can form long chains and also incorporate many other atoms.
B)Carbon obeys different laws of chemistry than most other chemicals.
C)Of all the elements, only carbon has a valence of 4.
D)Carbon has the unique ability to form double bonds with other carbon atoms.
E)Carbon is the most abundant type of atom on Earth.
2
Which of the following best fits the category of "polysaccharide"? (p. 39)
A)glucose
B)cellulose
C)maltose
D)sucrose
E)galactose
3
True or False: All biologically significant nucleic acids are polymers of nucleotides held together with phosphodiester bonds. (p. 42)
A)True
B)False
4
Which of the following is not a biological function that can be provided by some type of protein? (p. 45)
A)Support
B)Motion
C)Defense
D)There are proteins which can provide each of the above functions.
E)Only two of the above can be accomplished by protein
5
True or False: Lipids are typically dominated by nonpolar covalent bonds. (p. 54)
A)True
B)False
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