Complement is
A) a series of about 20 proteins in mammals which interact to lyse membranes of some organisms.
B) a form of self-recognition which helps distinguish self from non-self.
C) a major arm of the defence mechanism of Chordates.
D) central to a specific immune response due to their ability to cause antibody production.
E) a transmembrane protein which is a primitive recognition molecule which when stimulated secretes defence peptides.
Correct Answer:
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Q25: Allergenic responses occur because of:
A) infection through
Q26: Which of the following statements is INCORRECT?
A)
Q27: Most fatal cancerous tumours are allowed to
Q28: Which of the following statements about immunity
Q29: In plants
A) immune defence is similar to
Q31: Evolution of the immune system has resulted
Q32: T-cell receptors (TCR) and Immunoglobulins (Ig) are
Q33: Innate defence mechanisms are
A) only relevant to
Q34: If a pathogen passes the initial external
Q35: Complement is
A) produced by macrophages in response
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