Download Chapter 4 A Tour of the Cell Chapter 5 Membrane Transport and

Chapter 4 A Tour of the Cell
Chapter 5 Membrane Transport and Cell Signaling
A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the
organelles. Organelles in one of the heavier fractions could produce ATP in the light, whereas
organelles in the lighter fraction could produce ATP in the dark. The heavier and lighter fractions
are most likely to contain, respectively,
A) mitochondria and chloroplasts.
B) chloroplasts and peroxisomes.
C) peroxisomes and chloroplasts.
D) chloroplasts and mitochondria.
E) mitochondria and peroxisomes.
Answer: D
Topic: Concept 4.5
Which structure is not part of the endomembrane system?
A) nuclear envelope
B) chloroplast
C) Golgi apparatus
D) plasma membrane
E) ER
Answer: B
Topic: End-of-Chapter Questions
The presence of cholesterol in the plasma membranes of some animals
A) enables the membrane to stay fluid more easily when cell temperature drops.
B) enables the animal to remove hydrogen atoms from saturated phospholipids.
C) enables the animal to add hydrogen atoms to unsaturated phospholipids.
D) makes the membrane less flexible, allowing it to sustain greater pressure from within the cell.
E) makes the animal more susceptible to circulatory disorders.
Answer: A
Topic: Concept 5.1
Which structure is not part of the endomembrane system?
A) nuclear envelope
B) chloroplast
C) Golgi apparatus
D) plasma membrane
E) ER
Answer: B
Topic: End-of-Chapter Questions
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