Which of the following is an organic compound?
hydrochloric acid (HCI)
salt (NaCl)
sucrose (C12H22O11)
water (H2O)
The Correct Answer is C
A. hydrochloric acid (HCl): This is an inorganic acid, lacks carbon-hydrogen bonds.
B. salt (NaCl): Inorganic ionic compound, no carbon present.
C. sucrose (C₁₂H₂₂O₁₁): Sucrose is a carbohydrate (disaccharide), which contains carbon, hydrogen, and oxygen-hallmarks of organic compounds.
D. water (H₂O): Water is essential but inorganic-it contains no carbon.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. contain marker molecules to recognize self cells: Glycoproteins serve as cell identity markers to help the immune system distinguish “self” from “non-self.”
B. to act as the skeleton of the cell: The cytoskeleton, not membrane proteins, acts as the structural support inside the cell.
C. serve as ion channels: Membrane proteins act as channels to allow specific ions to pass through the membrane.
D. act as carrier proteins: Carrier proteins help transport substances across the membrane, often against a concentration gradient.
Correct Answer is C
Explanation
A. codon; a single amino acid in the protein to be made: A codon is a sequence of three RNA nucleotides, not DNA. Codons are found in mRNA during translation.
B. triplet; the entire protein to be made: A triplet codes for one amino acid, not the entire protein.
C. triplet; a single amino acid in the protein to be made: In DNA, a triplet is a group of three nucleotide bases that codes for a single amino acid during protein synthesis.
D. codon; gene: A codon (in mRNA) corresponds to one amino acid, not an entire gene.
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