Understanding Pathophysiology7 th Edition Test Bank Test Bank 2023

Understanding Pathophysiology7 th Edition Test Bank Test Bank 2023 Chapter 1. Cellular Biology MULTIPLE CHOICE 1. A student is observing a cell under the microscope. It is observed to have supercoiled DNAwith histones. Which of the following would also beobserved by thestudent? a. A singlecircularchromosome b. A nucleus c. Free-floating nuclear material d. No organelles ANS: B Thecell described is a eukaryotic cell, soit has histones and a supercoiled DNA within its nucleus;thus, the nucleus should be observed. A singlecircular chromosomeischaracteristic of prokaryotic cells, which do not have histones. Free-floating nuclear material describes a prokaryotic cell, which would not have a distinct nucleus. Eukaryotic cells have membrane bounded cellular components called organelles. No organellesdescribes a prokaryotic cell. 2. A nurseis instructing thestaff about cellular functions. Which cellular function is the nursedescribing when an isolated cell absorbs oxygen and uses it totransform nutrients toenergy? a. Metabolic absorption b. Communication c. Secretion d. Respiration ANS: D The ability of thecell to absorb oxygen refers to thecells function of respiration. The abilityof thecell to function within a society of cells refers toits function of communication. The abilityof thecell totakein nutrients refers tothecells function of metabolic absorption. The ability of the cell to synthesize new substances and secrete these elsewhere refers to the cellsfunction of secretion. 3. A eukaryotic cell is undergoing DNA replication. In which region of the cell would most ofthe genetic information be contained? a. Mitochondria b. Ribosome c. Nucleolus d. Nucleus ANS: C The region of the cell that contains genetic material, including a large amount of ribonucleic acid,most of the DNA, and DNAbinding proteins, is the nucleolus. The mitochondria is thesiteofcellular respiration. Theribosomes areinvolved in manufacturing of proteins within thecell. The nucleuscontains the nucleolus, and it is the nucleolus thatcontains genetic material. 4. The fluid mosaic model for biologic membranes describes membrane behavior. Accordingto this model, which of the following float singlyor as aggregates in thefluid lipid bilayer? a. Peripheral membrane proteins b. Integral membrane proteins c. Glycoproteins d. Cell adhesion molecules ANS: B Integral membrane proteins float freely in thefluid lipid bilayer. Peripheral membrane proteins are not embedded in the layer, but reside at the surface.Glycoproteins act as cell surface markers. Cell adhesion molecules are on the outsideof the membrane and allow cells to hook together