生物学 - 2026 进行中

科目: 生物学
级别: XI
类别: 大学生
测试题目: 英语
问题示例: A eukaryotic gene contains an intron with a mutation at its 5′ splice donor site. Which molecular consequence is most likely? The promoter will be permanently deleted from the chromosome, DNA replication will stop at the mutated intron, The mature mRNA may retain the intron or use an abnormal splice site, The ribosome will translate the intron before transcription begins