DNA:生物的遗传密码

DNA: Biology’s Genetic Code

DNA carries the defining data for life in a simple genetic code that comes with its own “back-up” system. Explore DNA structure with us!

274 次查看
莱斯大学
edX
  • 完成时间大约为 6
  • 中级
  • 英语
注:因开课平台的各种因素变化,以上开课日期仅供参考

你将学到什么

Methods that identified DNA as the genetic material

Structure of DNA and methods for packaging DNA into the cell

Impacts of packaging on DNA expression in higher organisms and passage of information with no change in DNA (epigenetics)

Location-specific DNA expression in the cell

Machinery for replicating DNA with an extremely low error rate

Place of origin and timing for DNA replication

Mechanisms for “preserving” the ends of linear DNA

Types of damage that affect DNA structure and how DNA moves around

Procedures to amplify DNA sequences and to determine base sequence

Enzymes to fragment DNA into specific segments that can be separated

Methods to recombine DNA segments from different sources

Ways to introduce recombined DNA into cells, including human cells

课程概况

DNA encodes our genetic information and is passed on within cells to maintain living organisms and to produce the next generation. The recognition of DNA as the genetic material and the ensuing identification of its structure and coding mechanism were both revolutionary and foundational. These discoveries led to transformational integration across the biological sciences with a common understanding of this fundamental unit of life! Join this exploration of DNA structure, packaging, replication, and manipulation.

The course utilizes video lectures, research articles, case studies, and molecular models to convey information. The course grade will be based on questions with each video lecture, quizzes, homework, and a final exam.

课程大纲

Lecture 1: DNA Structure

Comprised of only four monomers, DNA serves as thegenetic material of living organisms. We explore how DNA was identifiedas the genetic material, review the characteristics and structure of DNA,examine the information encoded in this interesting macromolecule, and explore implications of variations in DNA size and sequence.

Lecture 2: DNA Organization

We explore how DNA is arranged, packaged, and organized within the cell. We examine chromatin architecture, how chromatin is modified by histones, and how epigenetics can affect gene expression.

Lecture 3: DNA Replication I

We explore the mechanisms by which DNA is copied and the complications that arise due to the asymmetric construction of DNA with respect to its 3' and 5' ends. We examine the dynamic nature of the replication proteins and the exquisite specificity with which these proteinscan catalyze essential biochemical reactions, and how enzymatic activity can be regulated within the larger context of the cell.

Lecture 4: DNA Replication II

We explore further the replication machinerythat allows for the coordination of leading and lagging strand synthesis during DNA replication, a feature of both prokaryotic and eukaryotic DNA replication. We examine the initiation of DNA replication at origins of replication. We also discuss the involvement of nucleosomes and histones in this process, which is a unique feature of eukaryotic DNA. We also examinetermination of DNA replication and the involvement of telomerase in solving a unique problem of eukaryoticDNA replication: shortening of chromosomal endsduring DNA replication.

Lecture 5: DNA Manipulation

We examine the manipulation of DNA. The cell can restore (or sometimes alter) DNA by repairing damage from a variety of environmental sources. Repair of double-stranded breaks includes recombination (or exchanging DNA sequences between two different dsDNAs). We examine methods of DNA amplification, analysis, "cloning," and sequencing. These forms of "manipulating" DNA employ enzymes and functional properties that we have discussed. Our ever-more-efficient and cost-effective ability to sequence and to recombine DNA fragments has transformed biological and biomedical sciences, and much remains to be discovered!

预备知识

High school chemistry and biology and BIOC300.1x OR understanding and knowledge of protein structure and function

千万首歌曲。全无广告干扰。
此外,您还能在所有设备上欣赏您的整个音乐资料库。免费畅听 3 个月,之后每月只需 ¥10.00。
Apple 广告
声明:MOOC中国十分重视知识产权问题,我们发布之课程均源自下列机构,版权均归其所有,本站仅作报道收录并尊重其著作权益。感谢他们对MOOC事业做出的贡献!
  • Coursera
  • edX
  • OpenLearning
  • FutureLearn
  • iversity
  • Udacity
  • NovoEd
  • Canvas
  • Open2Study
  • Google
  • ewant
  • FUN
  • IOC-Athlete-MOOC
  • World-Science-U
  • Codecademy
  • CourseSites
  • opencourseworld
  • ShareCourse
  • gacco
  • MiriadaX
  • JANUX
  • openhpi
  • Stanford-Open-Edx
  • 网易云课堂
  • 中国大学MOOC
  • 学堂在线
  • 顶你学堂
  • 华文慕课
  • 好大学在线CnMooc
  • (部分课程由Coursera、Udemy、Linkshare共同提供)

© 2008-2020 CMOOC.COM 慕课改变你,你改变世界