An example of a latent virus infection is __________.

A. shingles
B. measles
C. polio
D. influenza
E. smallpox


Ans: A. shingles

Biology & Microbiology

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People who are lactose intolerant can often consume some products made from milk such as cheese and yogurt because microorganisms in their digestive system consume the lactose. By comparison, people with a true milk allergy, which involves an immune response to milk protein, cannot consume milk or products made from milk. Given this information, what can you conclude about milk?

A. The protein that causes a true milk allergy is lactose. B. All people who are lactose intolerant are also allergic to milk. C. Yogurt contains live and active cultures of Lactobacillus acidophilus bacteria and therefore prevents an allergic response in people with a true milk allergy. D. Lactose is a carbohydrate, not a protein and is therefore not the cause of true milk allergies.

Biology & Microbiology

Explain the concept of coevolution in terms of host-pathogen interactions

What will be an ideal response?

Biology & Microbiology

By 3.2 billion years ago, chemosynthetic cells had

become established a. near deep-sea hydrothermal vents. b. in salt lakes. c. in hot, highly acidic, fresh-water springs. d. in deep oceanic sediments. e. in the upper sunlit waters of the open oceans.

Biology & Microbiology

The damage caused by main-chain scission, cross-linking, and point lesions is permanent.

a. true b. false

Biology & Microbiology