Understanding Pathophysiology 7th edition by Huether, McCance Test Bank

Understanding Pathophysiology 7th edition by Huether, McCance Test Bank


Chapter361.36Cellular36Biology

MULTIPLE36CHOICE

1. A36student36is36observing36a36cell36under36the36microscope.36It36is36observed36to36have36sup
ercoiled36DNA36with36histones.36Which36of36the36following36would36also36be36observed36by3
6the36student?


a. A36single36circular36chromosome
b. A36nucleus
c. Free-floating36nuclear36material
d. No36organelles


ANS:36B

The36cell36described36is36a36eukaryotic36cell,36so36it36has36histones36and36a36supercoiled36DNA36
within36its36nucleus;36thus,36the36nucleus36should36be36observed.

A36single36circular36chromosome36is36characteristic36of36prokaryotic36cells,36which36do36not36have36h
istones.

Free-
floating36nuclear36material36describes36a36prokaryotic36cell,36which36would36not36have36a36distin
ct36nucleus.

Eukaryotic36cells36have36membrane36bounded36cellular36components36called36organelles.36No36organ
elles36describes36a36prokaryotic36cell.

2. A36nurse36is36instructing36the36staff36about36cellular36functions.36Which36cellular36function3
6is36the36nurse36describing36when36an36isolated36cell36absorbs36oxygen36and36uses36it36to36tran

sform36nutrients36to36energy?

a. Metabolic36absorption
b. Communication
c. Secretion

,d. Respiration

,ANS:36D

The36ability36of36the36cell36to36absorb36oxygen36refers36to36the36cells36function36of36respiration.

The36ability36of36the36cell36to36function36within36a36society36of36cells36refers36to36its36function36
of36communication.

The36ability36of36the36cell36to36take36in36nutrients36refers36to36the36cells36function36of36metabolic36abs
orption.

The36ability36of36the36cell36to36synthesize36new36substances36and36secrete36these36elsewhere36refers36t
o36the36cells36function36of36secretion.

3. A36eukaryotic36cell36is36undergoing36DNA36replication.36In36which36region36of36the36cell36
would36most36of36the36genetic36information36be36contained?

a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus


ANS:36C

The36region36of36the36cell36that36contains36genetic36material,36including36a36large36amount36of36r
ibonucleic36acid,36most36of36the36DNA,36and36DNA-binding36proteins,36is36the36nucleolus.

The36mitochondria36is36the36site36of36cellular36respiration.

The36ribosomes36are36involved36in36manufacturing36of36proteins36within36the36cell.

The36nucleus36contains36the36nucleolus,36and36it36is36the36nucleolus36that36contains36genetic36material
.

4. The36fluid36mosaic36model36for36biologic36membranes36describes36membrane36behavior.36Ac
cording36to36this36model,36which36of36the36following36float36singly36or36as36aggregates36in36the
36fluid36lipid36bilayer?


a. Peripheral36membrane36proteins
b. Integral36membrane36proteins

, c. Glycoproteins
d. Cell36adhesion36molecules


ANS:36B

Integral36membrane36proteins36float36freely36in36the36fluid36lipid36bilayer.

Peripheral36membrane36proteins36are36not36embedded36in36the36layer,36but36reside36at36the36surf

ace.36Glycoproteins36act36as36cell36surface36markers.

Cell36adhesion36molecules36are36on36the36outside36of36the36membrane36and36allow36cells36to36hook36t
ogether.

5. Which36of36the36following36can36bind36to36plasma36membrane36receptors?

a. Oxygen
b. Ribosomes
c. Amphipathic36lipids
d. Ligands


ANS:36D

Ligands36are36specific36molecules36that36can36bind36with36receptors36on36the36cell36mem

brane.36Oxygen36moves36by36diffusion;36it36does36not36bind36to36receptors.

Ribosomes36make36proteins36and36are36not36involved36in36

binding.36Amphipathic36lipids36are36a36portion36of36the36c

ell36membrane.

6. A36nurse36is36reviewing36a36report36from36a36patient36with36metastatic36cancer.36What36fi
nding36would36support36the36diagnosis36of36metastatic36cancer?36Alterations36in36extracellu
lar36matrix36that36include:

a. Decreased36fibronectin
b. Increased36collagen