Following statements are regarding to the expression of genes in floral quartate model in Arabidopsis thaliana.

A. Sepals- AP1(heterodimer) + SEP(homodimer)

B. Petals-AP1(monomer)+PI(monomer)+AP3(monomer)+SEP(monomer)

C. Stamens- AP3(monomer)+PI(monomer)+AG(monomer)+SEP(monomer)

D. Carpels- AG(homodimer)+SEP(homodimer)

Which of the following genetic combinations are incorrect?

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#Question id: 1753

#XL - Q Biochemistry

In the germinal center, B-cells become memory cells under the influence of:

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#Question id: 1754

#XL - Q Biochemistry

High affinity B-cell clones in mammals are usually generated by:

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#Question id: 1755

#XL - Q Biochemistry

Prior to class switching, B-cells express:

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#Question id: 1756

#XL - Q Biochemistry

Which of the following is the cytokine that is most involved in the class switch to IgE production?

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#Question id: 1757

#XL - Q Biochemistry

What is the first event following the production of CH germline transcripts by immunoglobulin genes?

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#Question id: 1758

#XL - Q Biochemistry

The specificity of antibody secreted by a B-cell may not be the same as that of the surface Ig of the clonal parent because of: