cytosine

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数据源: ai_enrichment
胞嘧啶是一种含氮碱基,是DNA和RNA的四种基本组成成分之一,在遗传信息传递中起关键作用。

用法要点

句型搭配

cytosine通常作为名词使用,在句子中作主语、宾语或定语,常见于描述DNA结构、基因突变或生物化学过程的句子中。

• Cytosine pairs with guanine in DNA.
• The mutation involves a change from cytosine to thymine.
• Cytosine methylation is an important epigenetic modification.

介词用法

cytosine常与介词如in、with、to、from等搭配,表示在DNA中、与鸟嘌呤配对、转变为其他碱基等关系。

• Cytosine in RNA can be modified.
• It pairs with guanine via hydrogen bonds.
• The change from cytosine to uracil occurs in RNA.

语域说明

cytosine是高度专业化的科学术语,主要用于生物学、化学、医学等学术领域,日常对话中极少使用,属于正式语体。

• In molecular biology, cytosine is essential for genetic coding.
• The lab report detailed cytosine levels in the sample.
• Research focuses on cytosine deamination mechanisms.

基础例句

In biology class, we learned that cytosine is one of the four bases in DNA.

在生物课上,我们学到胞嘧啶是DNA中的四种碱基之一。

The teacher explained how cytosine always pairs with guanine in the DNA double helix.

老师解释了在DNA双螺旋中,胞嘧啶总是与鸟嘌呤配对。

I read that mutations can occur when cytosine changes to another base like thymine.

我读到当胞嘧啶转变为其他碱基如胸腺嘧啶时,可能会发生突变。

高级例句

The research paper demonstrates that cytosine methylation plays a crucial role in gene expression regulation in eukaryotic cells.

这篇研究论文表明,胞嘧啶甲基化在真核细胞的基因表达调控中起着关键作用。

In genetic engineering, targeted modification of cytosine bases can be used to correct mutations associated with hereditary diseases.

在基因工程中,靶向修饰胞嘧啶碱基可用于纠正与遗传疾病相关的突变。

The pharmaceutical company is developing drugs that inhibit cytosine deaminase to treat certain types of cancer.

这家制药公司正在开发抑制胞嘧啶脱氨酶的药物,以治疗某些类型的癌症。

高频搭配

verb

pair withmethylatedeaminatemodifybind to

adjective

methylateddeaminatedmodifiednaturalsynthetic

noun

DNA cytosineRNA cytosinecytosine basecytosine residuecytosine analogue

adverb

commonlyspecificallychemicallybiologically

preposition

in DNAwith guanineto thyminefrom adenine

phrase

cytosine-guanine paircytosine methylationcytosine deaminationcytosine phosphatecytosine derivative

常见错误

❌ 错误:Cytosine is a protein in DNA.
✓ 正确:Cytosine is a nitrogenous base in DNA.

错误地将cytosine归类为蛋白质;正确说法是它是一种含氮碱基,属于核酸的组成部分,而非蛋白质。

❌ 错误:Cytosine pairs with adenine in DNA.
✓ 正确:Cytosine pairs with guanine in DNA.

混淆了碱基配对规则;在DNA中,胞嘧啶(C)与鸟嘌呤(G)通过氢键配对,而不是与腺嘌呤(A)配对。

近义词辨析

thymine

thymine是DNA中的另一种碱基,通常与腺嘌呤配对,而cytosine与鸟嘌呤配对;在RNA中,thymine被尿嘧啶取代,但cytosine仍存在。

In DNA, cytosine pairs with guanine, whereas thymine pairs with adenine.

uracil

uracil是RNA中的碱基,在结构上与cytosine相似但缺少一个甲基基团;在DNA中,cytosine存在,而uracil通常被thymine替代。

Cytosine is found in both DNA and RNA, but uracil is only in RNA, replacing thymine.