Describe the internal organization of a chloroplast. Be sure to list any chloroplast components covered in Chapter 3
What will be an ideal response?
The chloroplast has two membranes, an outer membrane and an inner membrane lying just inside the outer membrane. Chloroplasts contain individual disks called thylakoids, which contain the pigment chlorophyll. The thylakoids are arranged in interconnected stacks called grana. The grana are surrounded by a fluid called stroma.
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Water passes through lipid bilayers (select all correct choices):
A. directly by diffusion. B. through aquaporins by facilitated diffusion. C. through protein pumps and active transport. D. through gap junctions. E. through hemidesmosomes.
Which of the following types of molecules is LEAST involved in cell communication?
A. carbohydrates B. lipids C. steroids D. proteins E. neurotransmitters
Which of the following is a cause of interrupted
breathing? a. a tumor in the brain near the medulla oblongata b. lung cancer c. high altitude sickness d. low red blood cell count e. none of these
The Southern Hemisphere has no alpine tundra. Indicate whether the statement is true or false