The control center for cellular operations is the
A) nucleus.
B) mitochondria.
C) Golgi apparatus.
D) endoplasmic reticulum.
E) ribosome.
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Question 2) Most of a cell's DNA is located in its
A) ribosomes.
B) lysosomes.
C) Golgi apparatus.
D) nucleus.
E) nucleolus.
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Question 3) Most of the ATP required to power cellular operations is produced in the
A) cytoplasm.
B) endoplasmic reticulum.
C) nucleus.
D) mitochondria.
E) cilia.
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Question 4) Some cells contain large numbers of mitochondria while others have relatively few or none. This suggests that
A) cells with large numbers of mitochondria are short-lived.
B) cells with large numbers of mitochondria have a high energy demand.
C) cells with small numbers of mitochondria have a large ATP supply.
D) cells with large numbers of mitochondria have a low energy demand.
E) some cells are older than others.
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Question 5) Which of the following statements concerning mitochondria is false?
A) The cristae increase the inner surface area of the organelle.
B) The matrix contains metabolic enzymes involved in ATP synthesis.
C) Respiratory enzymes are attached to the surface of the cristae.
D) The mitochondria produce oxygen in the process of energy transformation.
E) The mitochondria produce most of a cell's ATP.
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Question 6) In addition to secreting products from the cell, vesicles produced by the Golgi apparatus can
A) house chromosomes.
B) produce ATP.
C) synthesize proteins.
D) add new material to the plasma membrane.
E) transport materials to the endoplasmic reticulum.
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Question 7) What is the source of new material for the plasma membrane?
A) microtubules
B) mitochondria
C) rough endoplasmic reticulum
D) ribosomes
E) Golgi apparatus
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Question 8) Organelles that break down fatty acids and hydrogen peroxide are
A) lysosomes.
B) peroxisomes.
C) endocytic vesicles.
D) nuclei.
E) toxisomes.
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Question 9) Peroxisomes
A) both generate and break down hydrogen peroxide.
B) pull the chromosomes toward the poles of a dividing cell.
C) manufacture proteins.
D) manufacture most of a cell's ATP.
E) contain the genetic information of a cell.
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Question 10) Macrophages are cells that engulf and consume germs or debris. What organelle must be especially plentiful in these cells?
A) centrioles
B) lysosomes
C) mitochondria
D) ribosomes
E) nuclei
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