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Put the following in the correct sequence to elicit a primary antibody response:                         1. Helper T cells bind to surface of B cells to activate them                         2. B cells bind foreign antigen in lymphoid organs.                         3. Antigen is processed inside B cell and goes back to surface.                         4. B cells proliferate to plasma cells and produce antibodies                         5. Helper T cells recognize foreign protein along with MHC class II molecules.

Which of the following steps occurs first in phagocytosis?  

If the RNA of a measles virus, a negative sense ss RNA virus,  was injected in a cell on it’s own would it be able to replicate? WHY?

How are TLR-4 and endotoxic septic shock associated with each other? Explain what happens in some detail.

A person born with a genetic deficinecy in their Neutrophils will be more prone to getting bacterial infections.

How does retroviral replication differ from another viral replication?

After the attachment, penetration, and uncoating of a lytic DNA virus into a host cell, what is the next step in the replication process?

Which of these events is an example of contact transmission?

What is the main purpose of this line? aapl[“Return”] = aapl[“Adj Close”].pct_change()  

Why does the code use: raw.columns = raw.iloc[0]df = raw.iloc[1:]