Type II interferon inhibits viral replication and activates natural killer cells. Indicate whether the statement is true or false
False - I
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Which of the following is not among the first line of defenses against infection?
a. resident bacterial populations d. skin b. tears, saliva, gastric fluid e. complement c. urine flow f. lysozyme
What mechanism is used to finely tune enzyme activity according to the needs of the cell?
A) enzyme specificity B) competitive inhibition C) allosteric regulation D) coupled reactions
Answer the following questions true (T) or false (F)
1. A bacteria's DNA can be found in the nucleus of the cell. 2. According the endosymbiont theory we can reason that the merging event that led to the mitochondria occurred before the merging event that led to the chloroplast because all eukaryotic cells which have chloroplasts also have mitochondria, but all cells that have mitochondria do not necessarily have chloroplasts. 3. Binary fission, mitosis, and meiosis all produce genetically identical daughter cells.
Chronic inhalation of particular fungal allergens would lead to a(n)
A. type I hypersensitivity reaction. B. type II hypersensitivity reaction. C. type III hypersensitivity reaction. D. type IV hypersensitivity reaction. E. autoimmune disease.