Which of the following characteristics describes mRNA?
It is a structural component of ribosomes
It carries genetic information from DNA for the purpose of synthesizing a polypeptide (protein)
It contains an anticodon
The ribose of its nucleotides is missing an oxygen
The Correct Answer is B
A. It is a structural component of ribosomes: That describes rRNA rather than mRNA.
B. It carries genetic information from DNA for the purpose of synthesizing a polypeptide (protein): Messenger RNA conveys the coding sequence from DNA to the ribosome where it directs polypeptide assembly.
C. It contains an anticodon: Anticodons are features of tRNA that pair with mRNA codons; mRNA contains codons, not anticodons.
D. The ribose of its nucleotides is missing an oxygen: Missing an oxygen on the 2′ carbon describes deoxyribose in DNA nucleotides; RNA nucleotides (including mRNA) have ribose with the 2′ oxygen present.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Psychrophiles: Psychrophiles grow best at very low temperatures (near 0–15°C) and are adapted to cold environments such as polar regions; they are not typically associated with infections in warm-blooded humans.
B. Thermophiles: Thermophiles prefer high temperatures (usually >45°C) and are commonly found in hot springs and geothermal sites; their temperature optimum is above human body temperature, so they rarely cause human infections.
C. Halophiles: Halophiles require or tolerate very high salt concentrations and are found in hypersaline environments (e.g., salt lakes); they are not commonly associated with human disease.
D. Mesophiles: Mesophiles grow best at moderate temperatures, typically between about 20–45°C, which overlaps human body temperature (≈37°C), making them the group most frequently associated with human infections.
Correct Answer is A
Explanation
A. True: Reverse transcriptase synthesizes complementary DNA (cDNA) from an RNA template, a process used by retroviruses and in molecular biology applications such as cloning eukaryotic genes.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.