TEST BANK FOR : Understanding Pathophysiology Verified Questions and Answers with Rationales Graded A+ Guaranteed Pass

,Chapter 01: Cellular Biology ss ss ss




Huether and McCance: Understanding Pathophysiology, 5th ss ss ss ss ss




Edition
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Chapter 01: Cellular Biology ss ss ss




Test Bank
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MULTIPLE CHOICE ss




1. A student is observing a cell under the microscope. It is observed to have
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supercoiled DNA with histones. Which of the following would also be observed by
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the student?
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a. A single circular chromosome
b. A nucleus
c. Free-floating nuclear material
d. No organelles
ANS: B ss




The cell described is a eukaryotic cell, so it has histones and a supercoiled DNA
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within its nucleus; thus, the nucleus should be observed.
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A single circular chromosome is characteristic of prokaryotic cells, which do not have
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histones.
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Free-floating nuclear material describes a prokaryotic cell, which would not have a
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distinct nucleus.
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Eukaryotic cells have membrane bounded cellular components called organelles. No
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organelles describes a prokaryotic cell.
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REF: p. 2 ss ss




2. A nurse is instructing the staff about cellular functions. Which cellular function is
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the nurse describing when an isolated cell absorbs oxygen and uses it to transform
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nutrients to energy?
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a. Metabolic absorption
b. Communication
c. Secretion
d. Respiration
ANS: D ss




The ability of the cell to absorb oxygen refers to the cell’s function of respiration.
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,The ability of the cell to function within a society of cells refers to its function of
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communication.
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The ability of the cell to take in nutrients refers to the cell’s function of metabolic
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absorption.
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The ability of the cell to synthesize new substances and secrete these elsewhere refers to
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the cell’s function of secretion.
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REF: p. 3 ss ss




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




The region of the cell that contains genetic material, including a large amount of
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ribonucleic acid, 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
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material.
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REF: p. 5 ss ss




4. The fluid mosaic model for biologic membranes describes membrane behavior.
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According to this model, which of the following float singly or as aggregates in the
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fluid lipid bilayer?
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a. Peripheral membrane proteins
b. Integral membrane proteins
c. Glycoproteins
d. Cell adhesion molecules
ANS: B ss




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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Glycoproteins act as cell surface markers.
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, Cell adhesion molecules are on the outside of the membrane and allow cells to hook
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together.
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REF: p. 6 ss ss




5. Which of the following can bind to plasma membrane receptors?
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a. Oxygen
b. Ribosomes
c. Amphipathic lipids ss




d. Ligands
ANS: D ss




Ligands are specific molecules that can bind with receptors on the cell membrane.
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Oxygen 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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Amphipathic lipids are a portion of the cell membrane.
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REF: p. 11 ss ss




6. A nurse is reviewing a report from a patient with metastatic cancer. What finding
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would support the diagnosis of metastatic cancer? Alterations in extracellular matrix
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that include:
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a. Decreased fibronectin
b. Increased collagen
c. Decreased elastin
d. Increased glycoproteins
ANS: A ss




Reduced amounts of fibronectin are found in some types of cancerous cells, allowing
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cancer cells to travel, or metastasize.
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Collagen provides strength, and its breakdown is associated with osteoarthritis, not
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cancer.
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Elastin is found in the lungs and allows tissues to stretch; it is not associated with
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cancerous cells.
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Decreased, not increased, glycoproteins are associated with cancerous cells.
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REF: p. 8
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7. Which form of cell communication is used to relate to other cells in direct physical
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contact?
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