Which of the following best describes the role of RNA polymerase in a cell? O A. It initiates translation of mRNA at the start codon for protein synthesis. O B. It reads the DNA molecule for synthesis of a complementary strand of MRNA. O C. It modifies an mRNA transcript by adding a poly-A tail and removing introns. D. It attaches to a DNA strand and unzips the molecule into two separate strands.

Which of the following best describes the role of RNA polymerase in a cell? O A. It initiates translation of mRNA at the start codon for protein synthesis. O B. It reads the DNA molecule for synthesis of a complementary strand of MRNA. O C. It modifies an mRNA transcript by adding a poly-A tail and removing introns. D. It attaches to a DNA strand and unzips the molecule into two separate strands.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter9: Molecular Biology

Section: Chapter Questions

Problem 6RQ: A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA...

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The ribosome is needed for translation of mRNA (a) because it has the enzyme for adding amino acids to the 5’ end of a tRNA (b) because the ribosomal RNA contains the codon which determines the sequence of amino acids in a protein (c) because it positions tRNA and mRNA so that correct pairing of codon and anti-codon can occur (d) because it has an enzyme that removes introns from mRNA (e) all of the above
Which of the following best describes tRNA? a. Provides the instructions for the amino acid sequence of a polypeptide b. Complexes with ribosomal proteins to form ribosomes c. Used for eukaryotic RNA processing d. Transports amino acids to ribosomes during translation
The ribosome is needed for translation of mRNA (a) because it has the enzyme that forms peptide bonds between amino acids (b) because the ribosomal RNA contains the codon which determine the sequence of amino acids in a protein (c) because it contains the enzyme that links the amino acids and tRNA (d) because it has enzyme that removes introns from mRNA (e) all of the above
A DNA strand with the sequence 3’ AACGTAACG 5’ is transcribed. What is the sequence of the mRNA molecule? 5’ AACGTAACG 3’ 5’ UUGCAUUGC 3’ 5’ TTGCATTGC 3’ 5’ UUGCAUUGC 3’
Which of the following BEST describes the characteristics and function of siRNA? A. a short strand of RNA that can complement and inactivate a sequence of mRNA B. a short strand of RNA that can act as a transcription factor to initiate transcription C. a strand of DNA that can bind to and inactivate an mRNA sequence D. a tRNA that is not able to attach to a ribosome and therefore inhibits the process of translation
What is the genetic code? a. The relationship between a three-base codon sequence and an amino acid or the end of translation b. The entire base sequence of an mRNA molecule c. The entire sequence from the promoter to the terminator of a gene d. The binding of tRNA to mRNA
A scientist studies the production of a key digestive enzyme in silk moths. The moths have one gene for this enzyme, and the scientist extracts mRNA transcribed from this gene as well as protein translated from it. The gene has three introns in its sequence. If the researcher compares mRNA from inside the nucleus to mRNA from the ribosomes, what will be found? A. less mRNA in the nucleus B. shorter mRNA in the ribosomes C. identical mRNAs in both places D. mRNA covalently attached to protein in the nucleus
Which of the following is the function of transfer RNA? a.Makes up the structure of ribosomes b.Stores genetic information c.Carries the message that guides polypeptide assembly d.Delivers amino acids to ribosomes
Following transcription, the RNA has a complementary sequence of which of the following?Question 9 options: A) regulatory sequences B) termination sequences in the coding strand of DNA C) the template strand of DNA D) none of the answers are correct
. Which of the following statements best summarizes the differences between DNA and RNA? A) DNA is transcribed using RNA polymerase to form mRNA and mRNA is translated by the Ribosome to form a polypeptide, B) The bases in DNA contain sugars, whereas the bases in RNA do not contain sugar. C) DNA nucleotides contain a different glucose compared to RNA nucleotides. D) DNA is formed using the base uracil, whereas RNA uses the base thymine. E) DNA encodes the sequence of amino acids for the primary structure of a polypeptide whereas mRNA does not
The information a cell needs to function is found on the DNA molecule in the form of a. multiple combinations of unknown chemicals. b. RNA subgroups. c. a spiral helix. d. four bases and the order in which they appear.
If a eukaryotic mRNA has failed to have a cap attached to its 5' end, what would the negative consequence(s) be? I chose b and got this questions wrong, why is this wrong? a. The mRNA would not properly exit the nucleus. b. The mRNA would not properly bind to a ribosome. c. The mRNA would not receive a poly A tail. d. The mRNA would not use the correct start codon. e. Both a and b are correct.