Describe how B-lymphocytes respond when they are stimulated by antigens.

When B-lymphocytes are stimulated by antigens, they first divide by mitosis to form clones, some of which become plasma cells that secrete antibodies, others become memory B-cells which can be stimulated at a later date to differentiate into plasma cells

Related Biology A Level answers

All answers ▸

Two proteins have the same number and type of amino acids but different tertiary structures. Explain why.


The genetic code is the sequence of bases in DNA, which is found in chromosomes and is made up of double stranded polynucleotides. Explain what is meant by the term “double-stranded polynucleotide” in relation to DNA.


Explain how competitive inhibitors work?


Describe the main differences between mitosis and meiosis