HESI LPN
HESI Maternal Newborn Questions
Question 1 of 5
In the structure of deoxyribonucleic acid (DNA), which of the following bases combines with thymine?
Correct Answer: B
Rationale: The correct answer is B: Adenine. In the structure of DNA, adenine pairs with thymine through hydrogen bonding, forming one of the complementary base pairs that make up the double helix structure of DNA. Cytosine pairs with guanine, not thymine. Rhodamine and serine are not DNA bases and do not participate in DNA base pairing.
Therefore, choices A, C, and D are incorrect.
Question 2 of 5
Which of the following statements is true of mutations?
Correct Answer: C
Rationale: The correct answer is C. Mutations can occur due to environmental influences such as radiation, chemicals, or other external factors, leading to changes in the DNA sequence.
Choice A is incorrect because mutations can also occur due to errors in DNA replication, not solely by chance.
Choice B is incorrect as mutations affect the DNA sequence itself, not the production of specific cells.
Choice D is incorrect because mutations involve changes in the DNA sequence and do not specifically involve the formation of the DNA structure.
Question 3 of 5
The actual sets of traits that people exhibit are called their genotypes.
Correct Answer: B
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 4 of 5
According to a study in 2014 by Skakkebaek et al., who among the following is most likely to have gynecomastia?
Correct Answer: C
Rationale: Individuals with Klinefelter syndrome have an extra X chromosome (XXY) and typically have reduced testosterone levels, which can lead to gynecomastia (enlarged breasts). This condition is not usually associated with Down syndrome (choice
A), XYY syndrome (choice
B), or Turner syndrome (choice
D), making them less likely to have gynecomastia.
Question 5 of 5
When assessing a woman in the first stage of labor, which clinical finding will alert the nurse that uterine contractions are effective?
Correct Answer: A
Rationale: During the first stage of labor, effective uterine contractions lead to cervical dilation. Dilation of the cervix is a key indicator that uterine contractions are progressing labor. Descent of the fetus to -2 station (
Choice
B) is related to the fetal position in the pelvis and not a direct indicator of uterine contraction effectiveness. Rupture of the amniotic membranes (
Choice
C) signifies the rupture of the fluid-filled sac surrounding the fetus and does not directly reflect uterine contraction effectiveness. An increase in bloody show (
Choice
D) can be a sign of impending labor, but it is not a direct indicator of uterine contraction effectiveness.