NURS 617 EXAM 1 ACTUAL EXAM 2024
NEWEST EXAM COMPLETE ACCURATE
EXAM QUESTIONS WITH DETAILED
VERIFIED ANSWERS (100% CORRECT
ANSWERS) AND RATIONALES /ALREADY
GRADED A+
What genetic process is likely responsible for the
occurrence of asthma in only one of a pair of
identical twins?
a. Transgenerational inheritance
b. Genomic imprinting
c. Epigenetic modifications
d. Methylation - ....ANSWER...c. Epigenetic
modifications
Rationale: Epigenetic modifications can cause
individuals with the same DNA sequences (such as
identical twins) to have different disease profiles.
,Imprinting means that wither the copy of the gene
inherited through the sperm or the copy inherited
through the egg is inactivated and remains in this
inactive state in all of the somatic cells of the
individual. The heritable transmission to future
generations of epigenetic modifications is called
transgenerational inheritance. DNA methylation is
called transgenerational inheritance. DNA
methylation occurs through the attachment of
methyl group to the carbon-5 position of a cytosine.
Prader-Willi syndrome causes a chromosomal
defect that is what?
a. Initiated by postnatal exposure to a virus
b. Inherited from the father
c. Related to maternal alcohol abuse
d. Transferred from mother to child - ....ANSWER...b.
Inherited from the father
Rationale: Prader-Willi syndrome can be caused by a
4 Mb deletion of chromosome 15q when inherited
from the father. This disorder is not caused by a
virus, or related to maternal alcohol abuse. The
,same gene deletion causes Angelman syndrome
when inherited from the mother.
What can a malfunction in DNA methylation lead to?
a. Hypothyroidism
b. Cancer
c. Blindness
d. Diabetes mellitus - ....ANSWER...b. Cancer
Rationale: Aberrant methylation can lead to silencing
of tumor-suppressor genes in the development of
cancer.
What is the difference between DNA sequence
mutations and epigenetic modifications?
a. Epigenetic modifications potentially can be
reversed
b. Leukemia is a result of only DNA sequence
mutation
c. DNA sequence mutations can be directly altered.
, d. No known drug therapies are available for
epigenetic modifications. - ....ANSWER...a. Epigenetic
modifications potentially can be reversed
Rationale: Unlike DNA sequence mutations, which
cannot be directly altered, epigenetic modifications
can be reversed.
Which term refers to the silenced gene of a gene
pair?
a. Mutated
b. Activated
c. Altered
d. Imprinted - ....ANSWER...d. Imprinted
Rationale: Gene silencing, a process during which
genes are predictably silenced, depending on which
parent transmits them, is known as imprinting.
What is most likely the shape of the face of a child
diagnosed with Russell-Silver syndrome?
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