简述稀有密码子对翻译的影响。
参考答案:有些基因中稀有密码子的使用频率较高,细胞内对应于稀有密码子的tRNA较少,这些基因的翻译过程容易受阻,从而影响蛋白质合成的总量。
真菌细胞壁特有的成分是()
A.糖苷类
B.糖蛋白
C.胆固醇
D.几丁质
E.角质
—Who is the man talking to the detective?
—Maybe he is one of the ________ who is asked to tell what he saw. [ ]
A. witness
B. suspects
C. actress