Microbiology: An Introduction
11th Edition
ISBN: 9780321733603
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: Benjamin Cummings
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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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Students have asked these similar questions
Which of the following statements about ribosomes is correct? *
a. the number of ribosomes in a cell seldom exceeds 50
b. the active site of a ribosome contains mostly protein molecules
c. structurally, ribosomes have two rRNA- protein subinuts
d. no correct response
What is the complementary hnRNA base sequence produced from the DNA base sequence 5' C-T-A-T-A-C 3' ? *
a. 3' C-T-A-G-A-T 5'
b. 3' C-G-G-A-T-A 5'
c. 3' G-A-U-A-U-G 5'
d. 3' G-A-T-A-T-G 5'
The product of the first phase in protein synthesis is *
a. DNA molecules
b. RNA molecules
c. both RNA and DNA molecules
d. neither RNA and DNA molecules
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.
All of the following regarding ribosomes are true EXCEPT:
A. Ribosomes are comprised of protein and RNA.
B. Ribosomes coordinate with initiation and elongation factors to regulate translation.
C. Ribosomes bind transcripts in their promoters.
D. Prokaryotic ribosomes are comprised of a large and a small subunit.
E. Ribosomes in eukaryotic cells bind to complete transcripts.
Chapter 20 Solutions
Microbiology: An Introduction
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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