C. Surface proteins.
Viral infection begins when proteins on the surface of a virion bind to specific receptor proteins on the surface of host cells.
Answer:
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Explanation:
Answer:
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Explanation:
1. Diphtheria is caused by the spread of a bacterium,
Corynebacterium diphtheria. When a person catches diphtheria, the bacteria release a toxin, or poison, into the person's body. The toxin infects the upper airways, and sometimes the skin, causing a membrane to grow across the windpipe.
2: Diphtheria is a serious infection caused byY strains of bacteria called Corynebacterium diphtheriae that make toxin (poison). It can lead to difficulty breathing, heart failure, paralysis, and even death.
3: Symptoms of diphtheria
. a thick grey-white coating that may cover the back of your throat, nose and tongue
. a high temperature (fever)
. sore throat
. swollen glands in your neck
. difficulty breathing and swallowing.
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Answer:
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