Biologists around the world spend a great deal of time studying the cytoskeleton of cells
Some of the tools they use in their research include chemicals that interfere with the structure
of the cytoskeletal elements or with the activities of the motor proteins that associate with the
cytoskeleton to facilitate movement. For example, a family of compounds called
cytochalasins disrupts the normal assembly and disassembly of microfilaments. Another
compound called colchicine binds to tubulin and prevents the assembly of microtubules. The
function of dynein is prevented by a compound known as EHNA (erythro-9-[3-2-
(hydroxynonyl)] adenine), and blebbistatin inhibits the activity of myosin. Use this information
to answer the following questions.
Based on this information, where would you predict blebbistatin to have the greatest effect?
A. sperm cell motility
B. leading edge formation of a migrating
fibroblast
C. the contraction at the trailing edge of a
fibroblast
D. Blebbistatin would likely have no effect on
any of these examples of cell movement.
C
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When comparing genes from Archaea, Bacteria, and Eukarya, which statement is TRUE?
A) Almost all archaeal genes are more similar to eukaryotic genes than to bacterial genes. B) Almost all archaeal genes are more similar to bacterial genes than to eukaryotic genes. C) Genes in Archaea involved in DNA replication, transcription, and translation are more similar to those of Eukarya, while those encoding metabolic functions other than information processing are more similar to those of Bacteria. D) Archaeal genes are almost universally unique; very few are similar to either eukaryotic or bacterial genes.
Transgenic plants produced by biotechnology contain fewer introduced genes than altered plants obtained by traditional breeding methods
a. True b. False Indicate whether the statement is true or false
The nodular, red, translucent surface material of a healing wound is called
A. soluble skin. B. irritated scab. C. granulation tissue. D. abscess.
What are lysosomes
What will be an ideal response?