f# f# f# f#
HUETHER, MCCANCE TEST BANK
f# f# f# f#
ALL WELL SOLVED COMPLETE (QUESTIONS AND ANSWERS)
f# f# f# f# f# f# f#
SOLUTION IN THIS TEST BANK
f# f# f# f# f#
,Chapter f#1. f#Cellular f#Biology
MULTIPLE f#CHOICE
1. Astudent f#is f#observinga f#cellunder f#thef#microscope. f#It f#is f#observed f#to f#have f#supercoiled
f# DNA f#with f#histones. f#Which f#of f#the f#following f#would f#also f#be f#observed f#by f#the
f# student?
a. Asinglef#circular f#chromosome
b. A f#nucleus
c. Free-floatingnuclear f # material
d. No f#organelles
ANS:f#B
The f#cellf#described f#isf#af#eukaryotic f#cell, f#so f#it f#hasf#histones f#and f#af#supercoiled f#DNAwithin f#its
f# nucleus; f#thus, f#the f#nucleus f#should f#be f#observed.
Asingle f#circular f#chromosome f#is f#characteristic f#ofprokaryotic f#cells, f#whichf#do f#not f#have f#histones.
Free-floatingf#nuclear f#materialdescribesf#af#prokaryoticf#cell,f#which would not f#havef#af#distinct
mi mi
f# nucleus.
Eukaryoticf#cells f#have f#membranef#bounded cellular f#componentsf#calledf#organelles. f#No
mi
organelles f#describes f#a f#prokaryotic f#cell.
f#
2. Af#nurse f#is f#instructing the f#staff f#about f#cellular f#functions. f#Which cellular f#function f#is f#the
m mi
nurse f#describing f#when f#an f#isolated f#cell f#absorbs f#oxygen f#and f#uses f#it f#to f#transform
f#
f# nutrients f#to f#energy?
a. Metabolic f#absorption
b. Communication
c. Secretion
d. Respiration
,ANS:f#D
The f#abilityoff#the f#cellf#to f#absorbf#oxygen f#refers f#to f#the f#cells f#function f#off#respiration.
The f#abilityoff#the f#cellf#to f#function f#within f#a f#societyofcells f#refers f#to f#its f#functionf#of
communication. f#The f#abilityof f#the f#cellf#to f#take f#in f#nutrients f#refers f#to f#the f#cells f#function f#of
f#
f# metabolic f#absorption.
The f#abilityofthe f#cellf#to f#synthesize f#new f#substances f#and f#secrete f#these f#elsewhere f#refers f#tof#the f#cells
f# function f#of f#secretion.
3. Aeukaryotic f#cell f#is f#undergoing f#DNAf#replication. f#Inf#which f#region f#ofthe f#cellwould
f# most f#of f#the f#genetic f#information f#be f#contained?
a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus
ANS:f#C
The f#regionofthe f#cellthat f#contains f#genetic f#material, f#including a f#large f#amount f#of ribonucleic
mi mi
f# acid, f#most f#of f#the f#DNA, f#and f#DNA-binding f#proteins, f#is f#the f#nucleolus.
The f#mitochondria f#is f#the f#sitef#ofcellular f#respiration.
Thef#ribosomes f#are f#involved f#in f#manufacturing f#ofproteins f#within the f#cell. mi
The#fnucleusf#contains f#the f#nucleolus, f#and f#it f#isf#thef#nucleolus f#that f#containsf#genetic f#material.
4. The f#fluid f#mosaic f#modelforf#biologic f#membranesf#describes f#membrane f#behavior.
f# According to f#this f#model, f#which f#of f#the f#following f#float f#singly f#or f#as f#aggregates f#in
mi
f# the f#fluid f#lipid f#bilayer?
a. Peripheralmembrane f#proteins
b. Integral f#membrane f#proteins
, c. Glycoproteins
d. Cell f#adhesion f#molecules
ANS:f#B
Integralmembranef#proteins f#float f#freelyf#in the f#fluid f#lipid f#bilayer.
mi
Peripheralmembranef#proteinsf#aref#not f#embedded f#inf#the f#layer, f#but f#residef#atf#thef#surface.
f# Glycoproteins f#act f#as f#cell f#surface f#markers.
Cellf#adhesion f#molecules f#are f#onthe f#outside f#ofthe f#membrane f#and f#allow f#cells f#to f#hooktogether.
5. Whichofthe f#following f#canf#bind f#to f# plasma f#membrane f#receptors?
a. Oxygen
b. Ribosomes
c. Amphipathicf#lipids
d. Ligands
ANS:f#D
Ligands f#arespecific f#molecules f#that f#canf#bind f#withreceptorsonthe f#cell f#membrane. f#Oxygen
f# moves f#by f#diffusion; f#it f#does f#not f#bind f#to f#receptors.
Ribosomes f#makeproteinsandf#arenot f#involved f#in binding. mi
f# Amphipathic f#lipids f#are f#a f#portion f#of f#the f#cell
f# membrane.
6. Anurse f#isf#reviewing f#areport f#from a f#patient f#with f#metastatic f#cancer. f#What f#finding
mi
would f#supportf#thediagnosis f#ofmetastaticf#cancer?#fAlterations f#in extracellular f#matrixf#that
f# mi
include:
f#
a. Decreased f#fibronectin
b. Increased f#collagen
c. Decreased elastinmi