Microbiology: An Introduction
Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Chapter 20, Problem 7MCQ

Which of the following will not affect eukaryotic cells?

  1. a. inhibition of the mitotic spindle
  2. b. binding with sterols
  3. c. binding to 80S ribosomes
  4. d. binding to DNA
  5. e. All of the above will affect them.
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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
A rare mutation can result in eukaryotic cells that causes a failure in the cell to synthesize the Signal Recognition Particle (SRP). Failure to make the SRP would impact protein synthesis by  ________                    . A. Preventing transition of bound ribosomes to free ribosomes B. Preventing binding of ribosomes to the rough ER during synthesis of proteins with a signal sequence C. Preventing export of mRNA out of the nuclear envelope D. Preventing binding of ribosomes to the smooth ER during synthesis of proteins with a signal sequence
Which of the following is NOT correct? A. Normal fasting blood glucose level is 200 mg/dL B. Translation is the process whereby MRNA is produced from a DNA template C. Synthesis of secretory proteins, integral membrane proteins, or proteins/enzymes for the lysosomes are made by free ribosomes D. Chaperonins are cytoplasmic proteins that maintain protein folding and are found in smooth ER E. All of the above F. None of the above
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