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,
,Understanding Pathophysiology 8th edition by Huether, McCance Test Bank
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Chapter 1. Cellular Biologyma ma ma




MULTIPLE CHOICE ma




1. A student is observing a cell under the microscope. It is observed to have supercoiled DN
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A with histones. Which of the following would also be observed by the student?
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a. A single circular chromosome
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b. A nucleus ma




c. Free-floating nuclear material ma ma




d. No organelles ma




ANS: B ma




The cell described is a eukaryotic cell, so it has histones and a supercoiled DNA within its nu
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cleus; thus, the nucleus should be observed.
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A single circular chromosome is characteristic of prokaryotic cells, which do not have histones.
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Free-
floating nuclear material describes a prokaryotic cell, which would not have a distinct nucleus.
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Eukaryotic cells have membrane bounded cellular components called organelles. No organelles
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describes a prokaryotic cell.
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2. A nurse is instructing the staff about cellular functions. Which cellular function is the nurs
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e describing when an isolated cell absorbs oxygen and uses it to transform nutrients to ener
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gy?

a. Metabolic absorption ma




b. Communication
c. Secretion
d. Respiration

, ANS: D ma




The ability of the cell to absorb oxygen refers to the cells function of respiration.
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The ability of the cell to function within a society of cells refers to its function of communicat
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ion.

The ability of the cell to take in nutrients refers to the cells function of metabolic absorption.
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The ability of the cell to synthesize new substances and secrete these elsewhere refers to the cells fu
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nction of secretion.
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3. A eukaryotic cell is undergoing DNA replication. In which region of the cell would most
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of the genetic information be contained?
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a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus


ANS: C ma




The region of the cell that contains genetic material, including a large amount of ribonucleic a
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cid, most of the DNA, and DNA-binding proteins, is the nucleolus.
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The mitochondria is the site of cellular respiration.
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The ribosomes are involved in manufacturing of proteins within the cell.
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The nucleus contains the nucleolus, and it is the nucleolus that contains genetic material.
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4. The fluid mosaic model for biologic membranes describes membrane behavior. According t
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o this model, which of the following float singly or as aggregates in the fluid lipid bilayer?
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a. Peripheral membrane proteins ma ma




b. Integral membrane proteins ma ma