题目内容

All of the following are considered components of the innate immunity except ()

A. Macrophages
B. Neutrophiles
C. Immunoglobulins
D. Natural killer cell
E. Monocytes

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B cells mature in which organ ()

A. bone marrow
B. Thymus
C. bursa Fabricii
D. lymph node
E. Spleen

Peptide binding groove in MHC I molecule can contain ()

A. 6-8 AA
B. 8-10 AA
C. 10-13 AA
D. 13-17 AA
E. 17-25 AA

The main components of endotoxin are ()

A. protein
B. lipopolysaccharide
C. nucleic acid
D. flagella
E. none of the above

Which one of the following is NOT true about the bacterial nucleus ()

A. Nuclear membrane
B. Nucleolus
C. Mitotic
DNA
E. none of the above