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1 Primary & Middle School Mathematics1–9 年级在线 2 High School Mathematics10–12 年级在线 3 University Mathematics — Year 1本科一年级在线 4 University Mathematics — Year 2本科二年级在线 5 University Mathematics — Year 3本科三年级在线

1 Primary & Middle School Physics1–9 年级在线 2 High School Physics10–12 年级在线 3 University Physics — Year 1本科一年级在线 4 University Physics — Year 2本科二年级在线 5 University Physics — Year 3本科三年级在线

1 School Chemistry — Grades 1 to 121–12 年级在线 2 University Chemistry — Year 1本科一年级在线 3 University Chemistry — Year 2本科二年级在线 4 University Chemistry — Year 3本科三年级在线

1 Primary & Middle School Biology1–9 年级在线 2 High School Biology10–12 年级在线 3 University Biology — Year 1本科一年级在线 4 University Biology — Year 2本科二年级在线 5 University Biology — Year 3本科三年级在线

1 Primary & Middle School Earth and Space Sciences1–9 年级在线 2 High School Earth and Space Sciences10–12 年级在线 3 University Earth and Space Sciences — Year 1本科一年级在线 4 University Earth and Space Sciences — Year 2本科二年级在线 5 University Earth and Space Sciences — Year 3本科三年级在线

1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Biology · 术语表

什么是 The RNAs？

又称： messenger RNA · transfer RNA · ribosomal RNA

Definition 11.12 University Biology — Year 1 · 第 11 章 — Nucleotides and Nucleic Acids

RNA is usually single-stranded, and folds back on itself wherever short complementary stretches allow, into hairpins, loops and bulges — a secondary structure — that then packs into a shape. Three classes carry the flow of genetic information (Chapter 19): messenger RNA (mRNA), a copy of a gene that the ribosome reads; transfer RNA (tRNA), some $75\,$ nucleotides folded into a cloverleaf, carrying an amino acid at its $3'$ end and an anticodon that pairs with the message; ribosomal RNA (rRNA), the structural and catalytic core of the ribosome, four fifths of the RNA of a cell. Many other RNAs regulate, splice, and guide (the Year 3 volume).

A transfer RNA in its cloverleaf secondary structure: a single strand of about 75 nucleotides paired with itself into four stems. The amino acid is carried at the 3' end; the anticodon at the opposite tip reads the message. — A transfer RNA in its cloverleaf secondary structure: a single strand of about 75 nucleotides paired with itself into four stems. The amino acid is carried at the $3'$ end; the anticodon at the opposite tip reads the message.

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