What is an intron?
An intervening sequence that does not encode for proteins
The portion of the transcript that encodes for protein
A person with a recessive allele that the dominant allele silences
One of a pair of genes that is inherited from a parent
The Correct Answer is A
A. An intervening sequence that does not encode for proteins:
Introns are non-coding sequences within a gene that are removed during RNA splicing before translation.
B. The portion of the transcript that encodes for protein:
This describes an exon, not an intron.
C. A person with a recessive allele that the dominant allele silences:
This describes a carrier in genetics, not an intron.
D. One of a pair of genes that is inherited from a parent:
This describes an allele, not an intron.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Cerebral aneurysm:
A cerebral aneurysm involves a bulging blood vessel in the brain, which could lead to rupture and bleeding. It is not associated with tremors or bradykinesia.
B. Multiple sclerosis:
MS involves demyelination causing muscle weakness and visual disturbances, but not primarily tremors and bradykinesia.
C. Amyotrophic lateral sclerosis (ALS):
ALS affects motor neurons, leading to muscle weakness and atrophy, but does not typically present with tremors or benefit from deep brain stimulation.
D. Parkinson disease:
Parkinson disease features tremors, bradykinesia (slow movements), and abnormal gait. Deep brain stimulation is an advanced therapy for symptom management in Parkinson’s.
Correct Answer is A
Explanation
A. Isotonic: An isotonic solution has the same solute concentration as blood plasma; thus, 0.9% NaCl does not cause cells to shrink or swell.
B. Exotonic: "Exotonic" is not a recognized term in fluid balance or physiology.
C. Hypotonic: A hypotonic solution (like 0.45% NaCl) has a lower solute concentration than blood, causing water to move into cells, possibly leading to swelling.
D. Hypertonic: A hypertonic solution (like 3% NaCl) has a higher solute concentration than blood, causing water to leave cells and leading to cell shrinkage.
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