Which of the following uses its cell wall glycolipids to absorb hydroxyl radicals and superoxide anions?
A) Staphylococcus aureus
B) Streptococcus pyogenes
C) Mycobacterium tuberculosis
D) Escherichia coli
Answer: C
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Lichens, a combination of fungi and certain algae, live together in a close community interaction. The traditional understanding of lichen is one where the algae produces food for the fungi and the fungi supply the algae with a suitable home. Recently, however, it was found that the algae can live just fine on their own and are also found living "alone" in nature. The fungi on the other hand do
not appear to live on their own in the "wild." Which type of interaction characterizes the "traditional" understanding of lichen? Why? Which type of interaction does the new research suggest? Why? What will be an ideal response?
The process by which protein conformation is lost or broken down is:
a. dehydration synthesis b. translation c. denaturation d. hydrolysis e. protein synthesis
From the following, select the animal with the least advanced nerve cord
a. chordate b. arthropod c. flatworm d. human e. octopus
Most digestion take place in the
a. stomach. b. small intestine. c. large intestine. d. stomach and small intestine equally. e. small and large intestine equally