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Biology · 2022 · 3 marks
Biotechnology and its ApplicationsBiotechnological Applications in Medicine3 marksUnderstandshort answer
CBSE 2022 · Region 2 · Set 3 · Q8
(a) Development of recombinant DNA technology has made the expression of protective protein antigens (to be used as 'vaccines') in heterologous…
(a)
Development of recombinant DNA technology has made the expression of protective protein antigens (to be used as 'vaccines') in heterologous systems/bacteria or any other organism. Give an example of a vaccine developed by such a technology and the host used.
(b)
Explain how a humoral immunity system gets into action when a foreign antigen enters into a human body.
Marking-scheme solution
(a) • Vaccine - Hepatitis B
Host - Yeast
(b) (B Lymphocytes) produce an army of proteins / antibodies in blood to fight against foreign antigen.
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CBSE Class 12 Biology past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.