Unity and Diversity A.2 Nucleic Acids (id: 535838060)

本题目来源于试卷: Unity and Diversity A.2 Nucleic Acids，类别为 IB生物学

[单选题]
What is the main role of the ribosomes labellq+ aex+dru1o,3(fp. dl t rzdkt1s 7)ted in the micrograph? cpn ti9xz4+dyng4bduj :eo+n9-e ; x5

A. Synthesise enzymes to be used within the cytoplasm
B. Transport mRNA from the nucleus to the cytoplasm
C. Destroy proteins that the cell no longer needs
D. Synthesise proteins for use in lysosomes


参考答案:  D


本题详细解析:
Bound ribosomes synthesise proteins for secretion outside ofpe, t8* ( k1lhltalhtu 8ziiw6;n3j p5 the cell, membrane-associated proteins or proteins used in lysosomes (Choice D).Choice A is incorrect, as free ribosomes synthesise proteins for use primarily within the cytoplasm.Choice B is incorrect as bound ribosomes do not transport mRNA from the nucleus to the cytoplasm.Choice C is incorrect as ribosomes do not destroy pttzjah ll1,uw*3il(56 8h;pep t ikn8roteins.

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