Red blood cells are characterized as having an actin cytoskeleton associated with their plasma membrane. The presence of the membrane cytoskeleton most likely accounts for:

A. the shape of the cell.
B. enhanced gas exchange.
C. the ability of these cells to fit through
narrow capillaries.
D. All of the above statements are correct.


D

Biology & Microbiology

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Someone who steps on a sharp nail will quickly lift their foot away. This quick reaction is known as a(n) _____________________

Fill in the blank(s) with correct word

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The initial symptoms of bacterial meningitis are the same regardless of the causative agent

Indicate whether this statement is TRUE or FALSE.

Biology & Microbiology

Refer to Figure 44-3. A semilunar valve regulates blood flow into which structures?

a. 1 and 2 b. 1 and 5 c. 1 and 7 d. 2 and 7 e. 7 and 11

Biology & Microbiology

Which procedure is most associated with unsuccessful transformation and degradation of DNA?

A. Induced transformation with plasmid DNA in noncompetent bacteria. B. Naturally-occurring transformation with DNA fragments in competent bacteria. C. Integration of DNA fragments in competent bacteria following naturally-occurring transformation.  D. Addition of DNA fragments from competent bacteria to live, noncompetent bacteria without artificial induction.

Biology & Microbiology