[IELTS Academic] Sentence Completion Trap Dissection | AceThePrep

IELTS AcademicReadingSentence Completion

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Passage: 'In cellular immunology, memory B cells undergo secondary somatic hypermutation within germinal centers upon re-exposure to a pathogen, progressively increasing their antibody binding affinity over time. This continuous refinement of receptor sensitivity is known as affinity maturation.'

Complete the sentence with NO MORE THAN TWO WORDS: The immunological process whereby antibodies develop stronger binding strength to target antigens over repeated exposures is termed _______.'

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