题目

图是某核苷酸链的示意图,据图回答问题:(1) 2、3、4的名称分别是____________、____________、________________________。(2)图中5代表____________,其构成的____________(物质)主要分布在____________(细胞结构) 答案:【答案】脱氧核糖 胞嘧啶 胞嘧啶脱氧核苷酸 脱氧核苷酸链 DNA 细胞核 【解析】题图分析,图示为核苷酸链示意图,该核苷酸链中含有碱基T,为脱氧核苷酸链,则1为磷酸,2为脱氧核糖,3为含氮碱基(胞嘧啶),4为胞嘧啶脱氧核苷酸,5为脱氧核苷酸链的片段。(1)该核苷酸链中含有碱基T,因为T胸腺Rewrite the sentences.按要求改写下列句子。1. Do you want to visit the museum with me? (另写一句,但意思不变)_________________________2. This is Linda. There is a scarf around her neck. (用have句型改写句子,意思不变)_________________________3. My father used a can to make a vase. (对划线部分提问)_________________________4. No eating or drinking! (另写一句,但意思不变)_________________________5. That man found the lost boy. (对划线部分提问)_________________________6. How can you help others? (回答问题)_________________________7. saw, they, things, and, many, felt, beautiful, happy, (.) (连词成句)_________________________
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