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. it requires heat to evaporate: Water has a high heat of vaporization, meaning it requires a lot of energy to evaporate.
B. it undergoes rapid temperature changes: Water has a high specific heat, meaning it resists rapid temperature changes, which helps maintain homeostasis.
C. it is an excellent solvent: Water is called the "universal solvent" due to its polarity, which dissolves many substances.
D. it is a great mixing medium, forming solutions, suspensions and colloids: Water forms various types of mixtures, including solutions, suspensions, and colloids.
Correct Answer is A
Explanation
A. As body temperature rises, sweating occurs to cool the body:
An example of negative feedback, where the body counters a change to restore normal state.
B. After drinking large amounts of water, urine output decreases to raise blood volume:
Urine output would actually increase to excrete the excess water and maintain volume.
C. Decreases in blood pressure cause a corresponding decrease in heart rate:
A decrease in blood pressure should cause the heart rate to increase (compensatory response).
D. As blood pressure falls, blood flow to the heart decreases:
The body usually increases heart rate and vasoconstriction to maintain cardiac output.
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