DNA DNA, or deoxyribonucleic acid, is the building block of life. It determines gene expression and makes us who we are, both as a species and as individuals. DNA is interesting not only for its important functions, but also because of its unique structure. ...
What macromolecules are polymers made of nucleotides? What compounds are the building blocks of DNA macromolecules? What is the structure of DNA? What type of macromolecule is messenger RNA? What type of molecule is DNA polymerase? What are the chemical components of a DNA molecule?
解析 B。解析:发现 DNA 结构需要耐心,所以他们是 patient(有耐心的)。选项 A careless(粗心的)不符合;选项 C impatient(没耐心的)不对;选项 D rude(粗鲁的)错误。本题考查形容词辨析和对科学家品质的认识,体现了耐心对科学创新的影响。反馈 收藏
[解析]主旨大意题。本文讲述了主人公Franklin的一系列事情,第一自然段作者提到"The fourth, --- was left out ",最后一段也提到"She contributed more than any other player to solving the structure of DNA.She must be considered a co-discoverer,"由此看出命运对她的不公,选A。反馈 ...
Yu X, VanLoock MS, Yang S, Reese JT, Egelman EH (2004) What is the structure of the RecA-DNA filament? Curr Protein Pept Sci 5: 73-79Yu,X., VanLoock,M.S., Yang,S., Reese,J.T. and Egelman,E.H. (2004) What is the structure of the RecA-DNA filament? Curr. Protein Pept...
Day3Playing with DNA(P6)Choose the best answer:1. What is synthetic biology research compared to in the text?B A. Shooting a sci-fi movie. B. Building with LEGO bricks. C. Solving a jigsaw puzzle. D. Programming a computer.2. What is the purpose of the DNA structure designed by ...
Section 3-1: DNA Structure Essential Question Describe the monomer of DNA. (HINT: what is it called?) (HINT: what is it made up of?) (HINT: what types of sugar or bases does it use?) Section 3-1: DNA Structure Learning Targets Explain how the structure of DNA determines the structu...
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DNA – What is it & What does it do? Life Science 8 / Butler The Structure of DNA DNA = ___ Acid Genetic material found in the ___ of a cell Cells contain ___ of DNA in each cell In humans: DNA forms 23 homologous pair of ___ Chromosomes hold ___: a section of DNA which...
they code. The structure of Each DNA molecule is a long double helix that resembles a spiral staircase and contains millions of steps. These steps of the staircase have pairs of four types of molecules called bases (nucleotides). These bases are paired as follows- the base...