Describe the stages chlamydia cells go through during infection of human cells and the significance for the key steps in the cycle
What will be an ideal response?
Answer: Figure 15.44 illustrates all stages cells undergo during infection. One key step involves conversion to large reticulate bodies, which is essential for the cells to propagate with binary fission. Subsequent conversion of cells into smaller elementary bodies enhances their desiccation resistance and enables them to spread and infect additional host cells.
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In what way do the various membranes of a cell differ?
a. Phospholipids are found only in certain membranes. b. Certain proteins are unique to each membrane. c. Only certain membranes are constructed from molecules with dual solubility. d. Only certain membranes of a cell are selectively permeable. e. Some membranes have hydrophobic surfaces exposed to the cytoplasm, while others have hydrophilic surfaces facing the cytoplasm.
Compare DNA methylation to histone acetylation
What will be an ideal response?
The evolution of horses involves primarily anagenesis
Indicate whether the statement is true or false.
At the end of gastrulation, what is produced?
a. a blastocyst b. germ layers c. solid balls of cells d. a neural tube e. apoptosis