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Batch of cells labeled as A: In the hypoxic condition, the amount of dosage required is 3 Gy but in oxygenic condition, the amount of dosage needed is 2. Batch of cells labeled as B: In hypoxic condition, the amount of dosage required is 30 Gy but in oxygenic conditions, the amount of dosage needed is 10. From the above information, what conclusions can be drawn?

Batch of cells labeled as A: In the hypoxic condition, the amount of dosage required is 3 Gy but in oxygenic condition, the amount of dosage needed is 2. Batch of cells labeled as B: In hypoxic condition, the amount of dosage required is 30 Gy but in oxygenic conditions, the amount of dosage needed is 10. From the above information, what conclusions can be drawn? Correct Answer Batch B has a higher OER

OER for A = 3/2 = 1.5 OER for B = 30/10 = 3 We know that higher the OER, the cells are more resistant to radiation i.e. they are non cancerous but lower the OER, the cells are cancerous. In the same way, if we look at the amount of radiation given to destroy the cells, the amount needed for Batch B is much higher. We know that non cancerous cells are resistant to radiations so even with this we can say that Batch B is non cancerous. Thus, we can conclude that batch A is cancerous but batch B is not.

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Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?
P. CD4+ cells make contact with macrophages and stimulate their microbicidal activity.
Q. CD4+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
R. CD8+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
S. CD8+ cells make contact with virus infected cells and kill them.