Biology: The Dynamics of Life, North Carolina Edition

Chapter 6: The Chemistry of Life

The Chemistry of Life

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Which element would need to be removed from the molecule in Figure 6-5 to make it unsaturated?
A)hydrogen
B)oxygen
C)carbon
D)phosphorus
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Which of the atoms pictured in Figure 6-3 is most likely to form an ion?
A)C
B)O
C)they are all equally likely to form an ion
D)Na
3
_____ represents a formula for a chemical compound.
A)P
B)H
C)C
D)H2O
4
Which of the following is a chemical reaction?
A)mixing salt and sugar in the same container
B)picking up iron filings with a magnet
C)tearing paper into strips
D)burning paper
5
Carbon-12, carbon-13, and carbon-14 are _____.
A)polymers
B)isotopes
C)radioisotopes
D)macromolecules
6
An unsaturated lipid contains _____.
A)only one fatty acid
B)double bonds
C)more oxygen than hydrogen
D)ionic bonds
7
A chlorine atom becomes a chloride ion when it _____.
A)loses a proton
B)loses an electron
C)gains a neutron
D)gains an electron
8
Glucose and fructose, with the formula C6H12O6, differ in _____.
A)kinds of atoms
B)arrangement of electrons
C)numbers of atoms
D)arrangement of atoms
9
Unlike carbohydrates and fats, proteins contain _____.
A)nitrogen
B)carbon
C)hydrogen
D)oxygen
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Which of the images in Figure 6-4 depicts dynamic equilibrium?
A)C
B)A
C)B
D)D
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