Where are nucleic acids chemically digested?
In the mouth
In the small intestine
In the large intestine
In the stomach
The Correct Answer is B
A. In the mouth: little to no chemical digestion of nucleic acids occurs in the mouth.
B. In the small intestine: pancreatic nucleases (DNase, RNase) and brush-border enzymes in the small intestine chemically digest nucleic acids into nucleotides and bases.
C. In the large intestine: the large intestine is primarily for water absorption and microbial fermentation, not major nucleic acid digestion.
D. In the stomach: the stomach mainly digests proteins (pepsin) and does not significantly chemically digest nucleic acids.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"A"}
Explanation
Correct answer: Right lung
The right lung occupies the right side of the thoracic cavity, is typically larger and divided into three lobes (superior, middle, inferior), and in the image the circled pulmonary tissue on the subject’s right side corresponds to the right lung.
Correct Answer is D
Explanation
A. arteriole: arterioles are small, muscular arteries with thicker walls and no valves; lymphatics are thin-walled and valved.
B. artery: arteries have thick, muscular, elastic walls to withstand high pressure; lymphatic vessels are thin-walled and low-pressure.
C. capillary: capillaries are tiny single-cell-thick vessels for exchange; lymphatics are larger and have valves.
D. vein: lymphatic vessels have thin walls and valves and operate under low pressure, making them most similar in structure/function to veins.
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