BIOCHEM CHAPTER 9 EXAM 1
1) Lipids may be either hydrophobic or ________.
A) hydrophilic
B) amphoteric
C) inorganic
D) amphipathic - CORRECT ANSWER-: D
Page Ref: 9-Introduction
2) ________ are the simplest lipids but they may be a part of or a source of many
complex lipids.
A) Triglycerols
B) Carbohydrates
C) Terpenes
D) Fatty acids
E) Waxes - CORRECT ANSWER-: D
Page Ref: Section 9-1
3) Isoprenoids are lipids which neither contain nor are derived from fatty acids and
include
A) steroids.
B) waxes.
C) terpenes.
D) A and C only.
E) A, B, and C. - CORRECT ANSWER-: D
Page Ref: Section 9-1
4) A fatty acid designated as 20:0 is ________, while one that is designated 20:3
D5,8,11 is ________.
A) simple; complex
B) complex; simple
C) saturated; unsaturated
D) unsaturated; saturated
E) monounsaturated; polyunsaturated - CORRECT ANSWER-: C
Page Ref: Section 9-2
5) Which statement is true about the usual concentration of free fatty acids in cells?
A) The concentration is low because it could disrupt cell membranes.
B) The concentration is low because fatty acids are synthesized in the extracellular fluid.
C) The concentration is high because of the demand for fatty acids in cell membranes.
D) The concentration is high because the mitochondria are continuously synthesizing
them. - CORRECT ANSWER-: A
Page Ref: Section 9-2
6) Which statement is true about the most common naturally occurring fatty acids?
, A) They have 50-100 carbon atoms and an even number of carbon atoms.
B) They have 50-100 carbon atoms and an odd number of carbon atoms.
C) They have 12-20 carbon atoms and an even number of carbon atoms.
D) They have 12-20 carbon atoms and an odd number of carbon atoms. - CORRECT
ANSWER-: C
Page Ref: Section 9-2
7) A fatty acid designated w-3
A) has three double bonds.
B) is saturated.
C) has a double bond three carbons from the end of the chain.
D) has a double bond three carbons from the a-carbon. - CORRECT ANSWER-: C
Page Ref: Section 9-2
8) Trans fatty acids have physical properties like those of
A) w-3 fatty acids.
B) cis-fatty acids.
C) unsaturated fatty acids.
D) saturated fatty acids. - CORRECT ANSWER-: D
Page Ref: Section 9-2
9) Plasma levels of cholesterol and triglycerides are elevated by
A) sphingolipids
B) cis-fatty acids.
C) trans-fatty acids.
D) plant oils. - CORRECT ANSWER-: C
Page Ref: Section 9-2
10) Fatty acids required in the diet of mammals are called
A) important.
B) dietary.
C) saturated.
D) essential.
E) esters. - CORRECT ANSWER-: D
Page Ref: Section 9-2
11) Most lipids in the average human diet are
A) unsaturated fatty acids.
B) saturated fatty acids.
C) glycerophospholipids.
D) triacylglycerols. - CORRECT ANSWER-: D
Page Ref: Section 9-3
12) Dietary triacylglycerols are digested as a result of
A) lipase action.
B) bile salts.
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