________ molecules deliver amino acids to ribosomes during translation.
A. Heterogeneous nuclear RNA (hnRNA)
B. Ribosomal RNA (rRNA)
C. Messenger RNA (mRNA)
D. Transfer RNA (tRNA)
Answer: D
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What results after a speciation event?
A) Two species have evolved that are each different from the original species. B) One new species evolves, while the original species stays the same. C) One new species evolves, while the original species may stay the same or evolve into something different. D) One new species evolves, while the original species goes extinct.
The molecule in the accompanying figure is the pyrimidine ____, which is typically found in DNA but not RNA
a. thymine b. adenine c. uracil d. guanine e. cytosine
When does gene expression occur?
a. when a gene is turned on to produce RNA b. when a gene is turned on to produce DNA c. when a gene is turned on to begin the cell cycle d. when a gene is turned on to begin the process of apoptosis
Which of the following best describes the relationship between DNA, proteins, and RNA?
A. DNA is transcribed into RNA, then RNA is translated into proteins. B. DNA is transcribed into proteins, then proteins are translated into RNA. C. DNA is translated into RNA, then RNA is transcribed into proteins. D. DNA is translated into proteins, then proteins are transcribed into RNA.