試題詳解

23. Individuals with xeroderma pigmentosum inherit a defective DNA repair mechanism. As a consequence,_________.
(A)they are sterile
(B)their cells have no proofreading abilities during DNA replication
(C)Okazaki fragments produced during DNA replication cannot be joined
(D) they easily deveiop skin cancer when exposed to sunlight
(E) their telomeres are shorter than average