TEST BANK FOR PORTH'S
ESSENTIALS OF
PATHOPHYSIOLOGY 5TH
EDITION BY TOMMIE L. NORRIS
-ALL CHAPTERS COVERED
,1. Chapter 1
Although the basic structure of the cell plasma membrane is formed by
a lipid bilayer, most of the specific membrane functions are carried out
by:
A) Bound and transmembrane proteins
B) Complex, long carbohydrate chains
C) Surface antigens and hormone receptors
D) A gating system of selective ion
channels ANS: A
Feedback:
The functions of plasma membrane depend on the presence of proteins
that are bound in the lipid bilayer and some that have the ability to
pass freely into and out of the cell.
Carbohydrate chains form a cell coat that surrounds the membrane
and that contain surface antigens and surface hormone receptors. Some
ion channels are gated and open only when the membrane potential
changes significantly.
2. Which describes the function of the nucleus?
A) It is basically the site of protein synthesis in the body.
B) It contains the genetic code for the individual.
C) It is the transformer of cellular energy.
D) It initiates the process of aerobic
metabolism. ANS: B
Feedback:
The nucleus contains DNA, which contains the genetic code that
contains the information that controls cells. Ribosomes synthesize
protein. Mitochondria transform organic compounds into cellular
energy. Mitochondria require oxygen for aerobic metabolism, using
hydrogen and carbon combined with oxygen molecules to form carbon
dioxide and water as energy is released.
3. Which of the following aspects of the function of the nucleus is
performed by ribosomal RNA (rRNA)?
A) Copying and carrying DNA instructions for protein synthesis
B) Carrying amino acids to the site of protein synthesis
C) Providing the site where protein synthesis occurs
D) Regulating and controlling protein
synthesis ANS: C
Feedback:
There are three types of ribonucleic acid (messenger RNA, ribosomal
RNA, and transfer RNA) that move to the cytoplasm and carry out the
actual synthesis of proteins.
Messenger RNA (mRNA) copies and carries the DNA instructions for
,protein synthesis to the cytoplasm; ribosomal RNA (rRNA) is the site of
protein synthesis; and transfer
, RNA (tRNA) transports amino acids to the site of protein synthesis for
incorporation into the protein being synthesized.
ESSENTIALS OF
PATHOPHYSIOLOGY 5TH
EDITION BY TOMMIE L. NORRIS
-ALL CHAPTERS COVERED
,1. Chapter 1
Although the basic structure of the cell plasma membrane is formed by
a lipid bilayer, most of the specific membrane functions are carried out
by:
A) Bound and transmembrane proteins
B) Complex, long carbohydrate chains
C) Surface antigens and hormone receptors
D) A gating system of selective ion
channels ANS: A
Feedback:
The functions of plasma membrane depend on the presence of proteins
that are bound in the lipid bilayer and some that have the ability to
pass freely into and out of the cell.
Carbohydrate chains form a cell coat that surrounds the membrane
and that contain surface antigens and surface hormone receptors. Some
ion channels are gated and open only when the membrane potential
changes significantly.
2. Which describes the function of the nucleus?
A) It is basically the site of protein synthesis in the body.
B) It contains the genetic code for the individual.
C) It is the transformer of cellular energy.
D) It initiates the process of aerobic
metabolism. ANS: B
Feedback:
The nucleus contains DNA, which contains the genetic code that
contains the information that controls cells. Ribosomes synthesize
protein. Mitochondria transform organic compounds into cellular
energy. Mitochondria require oxygen for aerobic metabolism, using
hydrogen and carbon combined with oxygen molecules to form carbon
dioxide and water as energy is released.
3. Which of the following aspects of the function of the nucleus is
performed by ribosomal RNA (rRNA)?
A) Copying and carrying DNA instructions for protein synthesis
B) Carrying amino acids to the site of protein synthesis
C) Providing the site where protein synthesis occurs
D) Regulating and controlling protein
synthesis ANS: C
Feedback:
There are three types of ribonucleic acid (messenger RNA, ribosomal
RNA, and transfer RNA) that move to the cytoplasm and carry out the
actual synthesis of proteins.
Messenger RNA (mRNA) copies and carries the DNA instructions for
,protein synthesis to the cytoplasm; ribosomal RNA (rRNA) is the site of
protein synthesis; and transfer
, RNA (tRNA) transports amino acids to the site of protein synthesis for
incorporation into the protein being synthesized.
