A student is trying to understand the possible reasons that a genetic abnormality might exist in an individual. Which of the following reasons is most plausible?
A)
DNA has combined with several types of protein and a small amount of RNA.
B)
Histones have exerted control on the folding of DNA strands.
C)
DNA has blocked genetic transcription by preventing access of nucleotides to the DNA surface.
D)
Chromatin has maintained its stable structure during the DNA replication process.
Ans:
D
Feedback:
To facilitate DNA replication and gene expression, chromatin must change its structure through the process of chromatin remodeling. Answers A, B, and C all denote normal genetic processes.
You might also like to view...
A child is taking methimazole (MTZ). What does the nurse teach parents to report immediately? (Select all that apply.)
A. Brittle hair B. Dry skin C. Headache D. Jaundice E. Pink or red urine
A patient has smoked two packs of cigarettes daily for many years. When the patient tries to reduce smoking, he experiences anxiety, craving, poor concentration, and headache. This scenario describes:
a. substance abuse. b. substance dependence. c. substance intoxication. d. recreational use of a social drug.
A 77-year-old female has fallen in her home and is brought to the emergency department by ambulance with a suspected fractured hip. X-rays confirm a fracture of the neck of the left femur
What complication is common in fractures of the neck of the femur? A) Osteoporosis B) Avascular necrosis C) Nonadherance of bones D) Septicemia
A nurse is providing discharge teaching to an elderly woman and her family caretakers. Teaching has been effective if the patient states:
1. "I will keep this list of medications that you gave me and bring it to all of the follow-up appointments." 2. "My doctor's office will get a full report of all the labs you did here in the hospital." 3. "I should empty all of my pills into one container so they don't get lost." 4. "I will write down every pill when I take it."