Some people seem to be resistant to HIV infection because a primary infection cannot be established in macrophages. What is the reason for this?
What will be an ideal response?
About 1% of the caucasoid population is homozygous for a mutant form of CCR5 that cannot be used by HIV as a co-receptor. The mutation involves a 32-nucleotide deletion called CCR5-?32, which alters the reading frame and results in a nonfunctional CCR5 protein. This renders such individuals resistant to primary infection by macrophage-tropic variants of HIV but still susceptible to lymphocyte-tropic strains that use the CXCR4 co-receptor.
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Tears contain an antibacterial enzyme to prevent bacterial infections in the eyes
Indicate whether the statement is true or false
Exercising alone is a good strategy for establishing physical activity as a permanent habit.
Answer the following statement true (T) or false (F)
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Answer the following statement true (T) or false (F)