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試卷名稱：109年 - 109 國立清華大學_碩士班招生考試入學試題_生命科學院甲組、丁組：分子生物學#125362
年份：109年
科目：研究所、轉學考(插大)◆分子生物學
40. Quantitative real-time PCR (qPCR) can be used to quantify mRNA levels of genes in different samples. The cycle numbers for the measurement of mRNA expression of gene X in sample A and B are 25 and 30, respectively, and those of GAPDH (a house keeping gene) in sample A and B are 12 and 13, respectively. What is the fold-difference in gene X expression between sample A and B? The PCR efficiencies for gene X and GAPDH are closed to 100%.
(A) A is 4-folds higher than B.
(B) A is 16-folds higher than B.
(C) B is 4-folds higher than A.
(D) B is 16-folds higher than A.
(E) None of the above
