Which of the following intermediate filament proteins is incorrectly matched with the cell type in which it is found?
A) keratin - epithelial cells
B) desmin - smooth muscle cells
C) vimentin - mesenchymal cells
D) nestin - connective tissue cells
E) GFA protein - glial cells
Answer: D
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This type of lipid is found in pigments such as chlorophyll, in the visual pigment retinal, and in rubber:
A. steroid. B. wax. C. prostaglandin. D. terpene. E. phospholipid.
You have discovered a fungus that has septate hyphae and is partnered with a photosynthetic cell. What type of
fungus is it, and how do you know this? What will be an ideal response?
Coccolithophorids are marine members of the brown algae
________________ Indicate whether the statement is true or false.
In 1861, Pasteur conducted his now-famous experiments using flasks with long necks bent into an S-shape. Imagine that you are a scientist working in Pasteur's lab at this time. You decide to tip the flasks so that broth enters the long S-shaped neck. You then return the flask to its upright position. Predict the most likely outcome of tipping one of Pasteur's S-necked flasks.
a. Microbes would grow in the broth because the tipping would introduce the oxygen necessary for microbial growth. b. The broth would remain uncontaminated because no microbes could enter the long S-shaped neck of the flask. c. The broth would become contaminated with microbes because they were trapped in the neck. d. Since the broth had been heated (effectively sterilizing it), no microbes would grow in the broth.