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Understanding Pathophysiology 7th edition by Huether, McCance Test Bank
All well solved complete (questions and answers) solution in this test bank

,Chapter 1. Cellular Biology mi mi mi




MULTIPLE CHOICE mi




1. A student is observing a cell under the microscope. It is observed to have supercoiled DNA
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mi 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 mi




c. Free-floating nuclear material mi mi




d. No organelles mi




ANS: B mi




The cell described is a eukaryotic cell, so it has histones and a supercoiled DNA within its
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mi nucleus; 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
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mi nucleus.

Eukaryotic cells have membrane bounded cellular components called organelles. No organelles
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mi describes a prokaryotic cell. mi mi mi




2. A nurse is instructing the staff about cellular functions. Which cellular function is the nurse
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mi describing when an isolated cell absorbs oxygen and uses it to transform nutrients to energy?
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a. Metabolic absorption mi




b. Communication
c. Secretion
d. Respiration

,ANS: D mi




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 communication.
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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
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mi function of secretion. mi mi




3. A eukaryotic cell is undergoing DNA replication. In which region of the cell would most of
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mi the genetic information be contained?
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a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus


ANS: C mi




The region of the cell that contains genetic material, including a large amount of ribonucleic acid,
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mi 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 to
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mi this model, which of the following float singly or as aggregates in the fluid lipid bilayer?
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a. Peripheral membrane proteins mi mi




b. Integral membrane proteins mi mi

, c. Glycoproteins
d. Cell adhesion molecules
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ANS: B mi




Integral membrane proteins float freely in the fluid lipid bilayer.
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Peripheral membrane proteins are not embedded in the layer, but reside at the surface.
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mi Glycoproteins act as cell surface markers. mi mi mi mi mi




Cell adhesion molecules are on the outside of the membrane and allow cells to hook together.
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5. Which of the following can bind to plasma membrane receptors?
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a. Oxygen
b. Ribosomes
c. Amphipathic lipids mi




d. Ligands


ANS: D mi




Ligands are specific molecules that can bind with receptors on the cell membrane. Oxygen
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mi moves by diffusion; it does not bind to receptors.
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Ribosomes make proteins and are not involved in binding.
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mi Amphipathic lipids are a portion of the cell membrane.
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6. A nurse is reviewing a report from a patient with metastatic cancer. What finding would
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mi support the diagnosis of metastatic cancer? Alterations in extracellular matrix that include:
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a. Decreased fibronectin mi




b. Increased collagen mi




c. Decreased elastin mi