Discover what controls how fast tiny molecular motors in our body pull through a single strand of DNA. How hard can the motor pull in a tug of war with the optical tweezers? Discover what helps it pull harder. Do all molecular motors behave the same?
Did you ever imagine that you can use light to move a microscopic plastic bead? Explore the forces on the bead or slow time to see the interaction with the laser's electric field. Use the optical tweezers to manipulate a single strand of DNA and explore the physics of tiny molecular motors.
Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to keep it stretched.
Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to keep it stretched. Is DNA more like a rope or like a spring?
In this activity, students are assigned different alleles of the gene for phenylalanine hydroxylase to research using OMIM (Online Mendelian Inheritance in Man). They are then asked to both explain and illustrate how this mutation may cause the disease phenylketonuria (PKU).
Psychology is designed to meet scope and sequence requirements for the single-semester introduction to psychology course. The book offers a comprehensive treatment of core concepts, grounded in both classic studies and current and emerging research. The text also includes coverage of the DSM-5 in examinations of psychological disorders. Psychology incorporates discussions that reflect the diversity within the discipline, as well as the diversity of cultures and communities across the globe.Senior Contributing AuthorsRose M. Spielman, Formerly of Quinnipiac UniversityContributing AuthorsKathryn Dumper, Bainbridge State CollegeWilliam Jenkins, Mercer UniversityArlene Lacombe, Saint Joseph's UniversityMarilyn Lovett, Livingstone CollegeMarion Perlmutter, University of Michigan
By the end of this section, you will be able to:
Explain the basic principles of the theory of evolution by natural selection
Describe the differences between genotype and phenotype
Discuss how gene-environment interactions are critical for expression of physical and psychological characteristics
Watch how NJ high school students apply basic principles of molecular biology to solve real research problems, and publish their own genome research at GenBank, the international genomic sequence database.
Students create and decode DNA for mans best friend to observe how variations in DNA lead to the inheritance of different traits. Strips of paper that represent DNA are randomly selected and used to assemble the dog's DNA. Students read the DNA and create a drawing of their pet, and compare it with others in the class to check for similarities and differences.
This simulation provides an opportunity to practice a restriction digest in a
virtual lab setting. Restriction enzymes are used to cut the DNA strands of
two plasmids, producing DNA fragments with complementary sticky ends
that can be reassembled to create a recombinant plasmid.
The discovery of restriction enzymes and their applications in DNA analysis has proven to be essential for biologists and chemists. This lesson focuses on restriction enzymes and their applications to DNA analysis and DNA fingerprinting. Use this lesson and its associated activity in conjunction with biology lessons on DNA analysis and DNA replication.
Bu simülasyon, sanal bir laboratuvar ortamında restriksiyon sindirimi ile ilgili uygulama yapma fırsatı sağlamaktadır. Restriksiyon enzimleri, iki plazmidin DNA ipliklerini kesmek için kullanılır ve böylece, bir rekombinant plazmid oluşturmak üzere yeniden bir araya getirilebilen komplementer yapışkan uçlara sahip DNA parçacıkları üretilir.
Diese Simulation bietet die Möglichkeit, einen Restriktionsverdau in einer virtuellen Laborumgebung zu üben. Restriktionsenzyme werden verwendet, um die DNA-Stränge von zwei Plasmiden zu schneiden, wodurch DNA-Fragmente mit komplementären kohäsiven Enden entstehen, die wieder zu einem rekombinanten Plasmid zusammengesetzt werden können.
Watch this video to witness one scientist's efforts to understand the DNA of extinct creatures so as to better understand the diversity of life today.
This scrollable interactive provides an overview of DNA replication and the key enzymes involved, highlighting the role of DNA ligase.
In this video segment from NOVA scienceNOW, meet researchers who are studying obesity and trying to understand the role that hormones and genetics can play in regulating appetite. [3:25]
"All DNA evidence is not created equal," says Greg Hampikian, Director of the Idaho Innocence Project. He'll tell us why DNA 'evidence' sometimes leads to the wrong conclusion in this audio lecture. [12:18]
Este interactivo desplegable muestra el motivo por el cual se necesita una técnica como la electroforesis en gel para ordenar moléculas de ADN de distinto tamaño, incluidos los plásmidos de ADN lineal y de ADN circular. El interactivo también analiza el motivo por el cual no siempre es posible determinar el tamaño de un trozo circular de ADN a partir de la distancia que recorre sobre un gel.