1.The role of testosterone in male reproductive function include all of the following EXCEPT 这题答案给 stimulating spermatogenesis by Leydig cells 我觉得有点问题,因为 LH -> Leydig cell -> testosterone -> Sertoli -> 精子生成 大家因该有学过此机制吧~ 2. What features of meiosis allow for independent assortment of chromosome? A.random alignment of homologous sister chromatids on the metaphase plate. B.separation of sister chromatids C.reduction of chromosome number from diploid to haploid D. B+C E. A+B+C 此题答案为A~ 题目要问的是独立分配律是何者?给A我觉得好像对又不对,因为独立分配律不就是 在减数分裂I时,同源染色体分开,非同源染色体可任意组合到个子细胞中~;而A选项 中random alignment of homologous sister chromatids已经讲到减数分裂II去了, 请问是我对独立分配律的见解有问题吗? 3. Which of the following is not a way that bacteria benefit human? A.produce foodstuffs such as cheese B.produce antibodies C.break down substance harmful to human, such as waste, toxin, explosives and petrochemicals D.kill harmful insect E.transfer nutrient across instinal membrance. 这题答案为E,但沈老大他说要把答案给为C,我觉得老师错了,因为在题库的下一题 就有说C选项是一种生物调节,如此看来对人类当然有利~大家怎麽看呀~ 以下是是非题 4.In terms of cell signaling estrogen in animal cells works in a similar fashion as the plant hormone auxin via binding to intrecellular receptor. 答案是TURE~ 我认为答案错了~auxin的受体是在膜上吧~ 5.Maternal effect genes are inherited via the mitochondria. 答案是FALSE~ 我认为母效基因的确可在粒线体,所以一些粒线体引起的疾病大多是因母亲方面所提供的 卵里有错误的DNA,大家觉得呢? 大家加油罗~ 希望这些问题可以出现在考题上,大家看到赚到^^~ --

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