C HAPTER 04: G ENETIC I SSUES
Urden: Critical Care Nursing, 9th Edition
MULTIPLE CHOICE
1. A specialized class of proteins that organizes the double -stranded DNA
into what looks like a tightl y coiled telephone cord is known which of the
following?
a. Chromatids
b. Karyot ype
c. Genomics
d. Histones
ANS: D
A specialized class of proteins called histones organizes the double -
stranded DNA into what looks like a tightly coiled telephone cord.
Genomics refers to the study of all of the genetic material within cells
and encompasses the envi ronmental interaction and impact on biologic
and physical characteristics. Each somatic chromosome, also called an
autosome, is made of two strands, called chromatids, which are joined
near the center. A karyot ype is the arrangement of human chromosomes
from largest to smallest.
PTS: 1 DIF: Cognitive Level: Remembering REF: p. 39
OBJ: Nursing Process Step: General TOP: Genetics
in Critical Care MSC: NC LEX: Health Promotion and
Maintenance
, 2. To achieve a consistent distance across the width of the DNA stra nd, the
nucleotide base guanine (G) can onl y be paired with what other genetic
material?
a. Adenine (A)
b. Thymine (T)
c. Cytosine (C)
d. Sex chromosome X
ANS: C
Four nucleotide bases —adenine (A), thymine (T), guanine (G), and
cytosine (C)—comprise the “letters” in th e genetic DNA “alphabet.”
The bases in the double helix are paired T with A and G with C. The
nucleotide bases are designed so that onl y G can pair with C and onl y
T can pair with A to achieve a consistent distance across the width of
the DNA strand. The T A and GC combinations are known as base pairs.
PTS: 1 DIF: Cognitive Level: Evaluating REF: p. 40
OBJ: Nursing Process Step: Diagnosis TOP: Genetics
in Critical Care MSC: NC LEX: Health Promotion and
Maintenance
3. Why are monoz ygotic twins separated at bi rth used to study the effects of
genetics versus environment?
a. They share an identical genome.
b. They have different sex chromosomes.
c. They have mirror chromosomes.
d. They have identical health issues.
Urden: Critical Care Nursing, 9th Edition
MULTIPLE CHOICE
1. A specialized class of proteins that organizes the double -stranded DNA
into what looks like a tightl y coiled telephone cord is known which of the
following?
a. Chromatids
b. Karyot ype
c. Genomics
d. Histones
ANS: D
A specialized class of proteins called histones organizes the double -
stranded DNA into what looks like a tightly coiled telephone cord.
Genomics refers to the study of all of the genetic material within cells
and encompasses the envi ronmental interaction and impact on biologic
and physical characteristics. Each somatic chromosome, also called an
autosome, is made of two strands, called chromatids, which are joined
near the center. A karyot ype is the arrangement of human chromosomes
from largest to smallest.
PTS: 1 DIF: Cognitive Level: Remembering REF: p. 39
OBJ: Nursing Process Step: General TOP: Genetics
in Critical Care MSC: NC LEX: Health Promotion and
Maintenance
, 2. To achieve a consistent distance across the width of the DNA stra nd, the
nucleotide base guanine (G) can onl y be paired with what other genetic
material?
a. Adenine (A)
b. Thymine (T)
c. Cytosine (C)
d. Sex chromosome X
ANS: C
Four nucleotide bases —adenine (A), thymine (T), guanine (G), and
cytosine (C)—comprise the “letters” in th e genetic DNA “alphabet.”
The bases in the double helix are paired T with A and G with C. The
nucleotide bases are designed so that onl y G can pair with C and onl y
T can pair with A to achieve a consistent distance across the width of
the DNA strand. The T A and GC combinations are known as base pairs.
PTS: 1 DIF: Cognitive Level: Evaluating REF: p. 40
OBJ: Nursing Process Step: Diagnosis TOP: Genetics
in Critical Care MSC: NC LEX: Health Promotion and
Maintenance
3. Why are monoz ygotic twins separated at bi rth used to study the effects of
genetics versus environment?
a. They share an identical genome.
b. They have different sex chromosomes.
c. They have mirror chromosomes.
d. They have identical health issues.
