You have isolated some DNA from liver cells. The base sequence of one strand of the DNA is TAGCCGA. The complementary sequence of bases on the complementary RNA must be:
ATCGGCT
AUCGGCU
CGTATTA
GCTATTA
The Correct Answer is B
A. ATCGGCT: This is a complementary DNA strand, not RNA. DNA uses thymine (T), but RNA uses uracil (U).
B. AUCGGCU: RNA transcription pairs A→U, T→A, G→C, and C→G.
DNA: T A G C C G A
RNA: A U C G G C U
C. CGTATTA: Random mismatch, not related to either DNA or RNA pairing for this sequence.
D. GCTATTA: Also incorrect DNA base pairing and not applicable to RNA transcription.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. ATCGGCT: This is a complementary DNA strand, not RNA. DNA uses thymine (T), but RNA uses uracil (U).
B. AUCGGCU: RNA transcription pairs A→U, T→A, G→C, and C→G.
DNA: T A G C C G A
RNA: A U C G G C U
C. CGTATTA: Random mismatch, not related to either DNA or RNA pairing for this sequence.
D. GCTATTA: Also incorrect DNA base pairing and not applicable to RNA transcription.
Correct Answer is A
Explanation
A. cellulose: Humans lack the enzyme cellulase, so we cannot break down cellulose, a plant polysaccharide, for energy.
B. starch: Starch is digestible; humans have amylase to break it down into glucose.
C. glycogen: Glycogen is stored in human liver and muscle and is easily digested.
D. monosaccharides: These are already single sugar units, like glucose, and require no digestion.
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