Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Chapter 20, Problem 6MCQ
Summary Introduction
Introduction:
Though protein synthesis is done by both prokaryotic and eukaryotic cells, they differ in the structure of ribosome. The prokaryotic cells have 70S ribosomes, whereas the eukaryotic cells contain 80S ribosomes. The mitochondrial ribosome in the eukaryotic cells possess 70S ribosomes similar to the bacterial cells.
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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
In bacteria the ribosome is positioned next to the start codon by
A
the ribosome binding site
B
a promoter
C
by scanning for a correct start codon
D
none of the above
Which of the following would likely result in the formation of RNA?
Group of answer choices
a.injection of antisense RNA from yeast into a human
b.injection of antisense RNA from a human into human cells
c.injection of sense RNA into C. elegans
d.all of the above
e. none of the above
Chapter 20 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 20 - DRAW IT Show where the following antibiotics work:...Ch. 20 - List and explain five criteria used to identify an...Ch. 20 - What similar problems are encountered with...Ch. 20 - Define drug resistance. How is it produced? What...Ch. 20 - List the advantages of using two chemotherapeutic...Ch. 20 - Why does a cell die from the following...Ch. 20 - How does each of the following inhibit...Ch. 20 - The OH is missing from carbon 39 in ddI. How does...Ch. 20 - Compare the method of action of the following...Ch. 20 - NAME IT This microorganism is not susceptible to...
Ch. 20 - Which of the following pairs is mismatched? a....Ch. 20 - Prob. 2MCQCh. 20 - Prob. 3MCQCh. 20 - An antimicrobial agent should meet all of the...Ch. 20 - The most selective antimicrobial activity would be...Ch. 20 - Prob. 6MCQCh. 20 - Which of the following will not affect eukaryotic...Ch. 20 - Cell membrane damage causes death because a. the...Ch. 20 - A drug that intercalates into DNA has the...Ch. 20 - Chloramphenicol binds to the 50S portion of a...Ch. 20 - Prob. 1ACh. 20 - Why is idoxuridine effective if host cells also...Ch. 20 - Some bacteria become resistant to tetracycline...Ch. 20 - The following data were obtained from a...Ch. 20 - Prob. 5ACh. 20 - The following results were obtained from a broth...Ch. 20 - Vancomycin-resistant Enterococcus faecalis was...Ch. 20 - Prob. 2CAECh. 20 - Prob. 3CAE
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- The antibiotic binds reversibly to an allosteric site on the ribosome. Which of the following will be affected by this inhibitor? a. Vmax will increase b. Vmax will decrease c. Km will increase d. Km will decreasearrow_forwardhow does eukaryotic ribosome find the mRNA to be translated? A. the sigma factor B. the shine-Dalgarno sequence C. the Inr sequence D. the 5'caparrow_forwardWhich of the following is the function of transfer RNA? A. Carries the message that guides polypeptide assembly B. Stores genetic information C. Makes up the structure of ribosomes D. Delivers amino acids to ribosomesarrow_forward
- Which of the following is true of ribosome rescue? (C & E wrong) A. The process produces a protein that is tagged for degradation. B. Proteases enter the A-site of the ribosome to degrade the C-terminus of the synthesized peptide. C. A partially translated mRNA becomes fully degraded before it can be translated further. D. No protein is produced in the process. E. Stalled ribosomes are released in the absence of a stop codon.arrow_forwardA biologist develops a new drug that seems to dramatically slow the onset of symptoms resulting from HIV infection. Close monitoring of HIV-infected cells reveals that the viral proteins are in the form of long polyproteins. What kind of drug did the biologist develop? A. It is a glycosyl transferase inhibitor. B. It is an integrase inhibitor C. It is a protease inhibitor. D. It is a CD4 inhibitor. please explain why which answer is correct and which is wrong and whyarrow_forwardWhich of the following describes the effect of a frameshift mutations? * A. all mRNA codons change B. some, but not all , mRNA codons change C. there is no change in mRNA codons D. no correct response Consider the following DNA base sequence 3' TTA ATA 5'. what dipeptide is formed if a DNA point mutation converts ATA to ATG? * A. Cys-Phe B. Tyr-Tyr C. Phe-Leu D. Ser-Tyr Consider the following mRNA base sequence 5' ACC CAC 3', what dipeptide is formed if a point mutation converts ACC to ACU? * A. Thr-His B. Thr-Thr C. His- Ile D. Ile- Asp Which of the following statements below is incorrect? * A. the genetic code is overlapping B. the genetic code is universal C. degenerate codon specify the same amino acids…arrow_forward
- how does the E.coli ribosome find the RNA to be translated? A. the sigma factor B. the shine- Dalgarno sequence C. the kozak sequence D. thee 5'caparrow_forwardTransfer RNA ____________________. a. Carries amino acids to the ribosome b. Carries information from the DNA to the ribosome c. Helps make up the ribosome d. Carries oxygen to cellsarrow_forwardThe “A” site in the ribosome refers to the: A. binding site for charged t-RNA molecules during protein synthesis B. Site that allows for tRNAs to exit C. a site that holds the tRNA which is linked to the growing polypeptide chain D. none of these answeresarrow_forward
- The protein component of the ribosome is thought to provide what function? a. Structural stability. b. Catalytic function. c. Nucleic acid binding/recognition. d. None of the above.arrow_forwardMany antibiotic drugs work by interfering with protein synthesis in bacteria that cause infection. Predict what happens to a bacterial cell if an antibiotic: A. Covalently bonds to the P site on a prokaryotic ribosome. B. t -RNA picks up the wrong amino acid.arrow_forwardWhich of the following is the definition of a gene? A. RNA that delivers amino acids to a ribosome during translation B. A unit of information encoded in the sequence of nucleotide bases in DNA C. The RNA component of ribosomes D. RNA that carries a protein-building messagearrow_forward
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