Chapter 15: Q. 21 (page 392)
A scientist sequencing mRNA identifies the following strand: CUAUGUGUCGUAACAGCCGAUGACCCG What is the sequence of the amino acid chain this mRNA makes when it is translated
Short Answer
Met Cys Arg Asn Ser Arg
Chapter 15: Q. 21 (page 392)
A scientist sequencing mRNA identifies the following strand: CUAUGUGUCGUAACAGCCGAUGACCCG What is the sequence of the amino acid chain this mRNA makes when it is translated
Met Cys Arg Asn Ser Arg
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Get started for freeA fragment of bacterial DNA reads: 3โ โTACCTATAATCTCAATTGATAGAAGCACTCTACโ 5โ Assuming that this fragment is the template strand, what is the sequence of mRNA that would be transcribed? (Hint: Be sure to identify the initiation site.)
A scientist introduces a mutation that makes the 60S ribosomal subunit nonfunctional in a human cell line. What would be the predicted effect on translation? a. Translation stalls after the initiation AUG codon is identified. b. The ribosome cannot catalyze the formation of peptide bonds between the tRNAs in the A and P sites. c. The ribosome cannot interact with mRNAs. d. tRNAs cannot exit the E site of the ribosome
Three different bacteria species have the following consensus sequences upstream of a conserved gene.
Species A | Species B | Species C | |
-10 | TAATAAT | TTTAAT | TATATT |
-35 | TTGACA | TTGGCC | TTGAAA |
Order the bacteria from most to least efficient initiation of gene transcription.
Explain how single nucleotide changes can have vastly different effects on protein function.
. Which event contradicts the central dogma of molecular biology?
a. Poly-A polymerase enzymes process mRNA in the nucleus.
b. Endonuclease enzymes splice out and repair damaged DNA.
c. Scientists use reverse transcriptase enzymes to make DNA from RNA.
d. Codons specifying amino acids are degenerate and universal.
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