Microbiology: An Introduction Plus Mastering Microbiology with Pearson eText -- Access Card Package (13th Edition) (What's New in Microbiology)
13th Edition
ISBN: 9780134688640
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Chapter 11, Problem 3A
Bacteria are single-celled organisms that must absorb their nutrients by simple diffusion. The dimensions of Thiomargarita namibiensis are several hundred times larger than those of most bacteria, much too large for simple diffusion to operate. How does the bacterium solve this problem?
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In the diagram below, identify the structures of a cyanobacterial cell based on the following descriptions:
a) Outer cellular covering which includes:
Mucilaginous layer – outermost layer covering the cell wall; protects the cell from harmful factors of the environment
Cell wall – found just below the mucilaginous layer; 2 or 3-layered, the inner layer lies in between the outer wall layer and plasma membrane; the outer layer is made of peptidoglycan
Innermost plasma membrane – selectively permeable membrane enclosing the cytoplasm
b) Cytoplasm – found below the plasma membrane; the protoplasm which contains structures of different shapes and functions. Lamellae, which contain pigments such as chlorophylls, carotenes, xanthophylls, phycoerythrin and phycocyanin, are located in the peripheral region of cytoplasm. Ribosomes may also be found scattered in the cytoplasm.
c) Nucleic material – the nucleoplasm that is centrally located in the cell and contains chromatin in the form…
You perform a Gram staining technique on two bacterial species and observe that
one is stained purple while the other is stained pink. Which of the following is
consistent with this observation?
a) The purple one is likely more resistant to penicillin
b) Both bacteria have a cell wall made of mycolic acid
c) Their peptidoglycan layers have the same thickness
d) They differ in the number of phospholipid membranes
e) One has a monolayer of phospholipids while the other has a bilayer of
phospholipids
Which statement among A - D is false?
A) O Active transport processes allow a bacterium to maintain an ion gradient
B) O Membrane permeant acids and bases can act as growth inhibitory agents towards bacteria.
C) O Transport via group translocation results in modification of the incoming solute.
D) O Bacteria tend to maintain their interior slightly hypertonic relative to the external environment.
E) O None of A-D is false.
Chapter 11 Solutions
Microbiology: An Introduction Plus Mastering Microbiology with Pearson eText -- Access Card Package (13th Edition) (What's New in Microbiology)
Ch. 11 - The following outline can be used to identify...Ch. 11 - Compare and contrast each of the following: a....Ch. 11 - DRAW IT Draw a key to differentiate the following...Ch. 11 - Prob. 4RCh. 11 - If you Gram-stained the bacteria that live in the...Ch. 11 - Which of the following does not belong with the...Ch. 11 - Prob. 3MCQCh. 11 - Prob. 4MCQCh. 11 - Which of the following terms is the most specific?...Ch. 11 - Which one of the following does not belong with...
Ch. 11 - Which of the following pairs is mismatched? a....Ch. 11 - Prob. 8MCQCh. 11 - When Legionella was newly discovered, why was it...Ch. 11 - Prob. 10MCQCh. 11 - Prob. 1ACh. 11 - Prob. 2ACh. 11 - Bacteria are single-celled organisms that must...Ch. 11 - After contact with a patients spinal fluid, a lab...Ch. 11 - Between April 1 and May 15 of one year. 22...Ch. 11 - Prob. 3CAE
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