02:50Changing the Blueprints of Life - Genetic Engineering: Crash Course Engineering #38CrashCourse518views
Multiple ChoiceThe expression of the Pax-6 gene when vertebrate and fruit fly versions of the gene are exchanged between these animal groups illustrates __________. 563views
Multiple ChoiceAn enzyme that cuts DNA at a symmetrical sequence of bases is called __________. 707views
Multiple ChoiceWhen a typical restriction enzyme cuts a DNA molecule, the cuts are staggered so that the DNA fragments have single-stranded ends. This is important in recombinant DNA work because __________. 1224views1rank
Multiple ChoiceA scientist wishing to create an organism capable of breaking down several kinds of toxic waste combines genes from several species of bacteria to create a single "superbacterium." Which of the following would be needed for this project? 773views
Multiple ChoiceAll of the following are current applications of DNA technology in medicine except __________. 774views
Multiple ChoiceDolly, the sheep, was cloned from an adult cell. She had a number of health problems and died at a relatively young age. Three mules that were born in 2003 were cloned from fetal cells. If it turns out that the mules remain healthy and live normal lives, how would this outcome tie in with Gurdon's observations with tadpoles? 880views
Multiple ChoiceAll of the following are true regarding induced pluripotent stem (iPS) cells except __________. 1064views
Multiple ChoiceHuman nerve cells differ from human muscle cells because different sets of genes are expressed; in each type of cell, different genes are transcribed into mRNA and translated into protein. Which of the following techniques would be the most efficient way to identify the genes that these cells express? 2073views
Multiple ChoiceTransgenic organisms can be scientifically or commercially useful only if __________. 878views
Multiple ChoiceWhich of the following can be done by using biotechnology but cannot be done using traditional agricultural breeding practices? 709views
Textbook QuestionWhich of the following tools of DNA technology is incorrectly paired with its use? a. electrophoresis—separation of DNA fragments b. DNA ligase—cutting DNA, creating sticky ends of restriction fragments c. DNA polymerase—polymerase chain reaction to amplify sections of DNA d. reverse transcriptase—production of cDNA from mRNA624views
Textbook Question'Bt maize' a. is resistant to various herbicides, making it practical to weed rice fields with those herbicides. b. contains transgenes that increase vitamin A content. c. includes bacterial genes that produce a toxin that reduces damage from insect pests. d. is a 'boron (B)-tolerant' transgenic variety of maize.419views
Textbook QuestionPlants are more readily manipulated by genetic engineering than are animals because a. plant genes do not contain introns. b. more vectors are available for transferring recombinant DNA into plant cells. c. a somatic plant cell can often give rise to a complete plant. d. plant cells have larger nuclei.1356views
Textbook QuestionToday, it is fairly easy to make transgenic plants and animals. What are some important safety and ethical issues raised by this use of recombinant DNA technology? What are some of the possible dangers of introducing genetically engineered organisms into the environment? What are some reasons for and against leaving decisions in these areas to scientists? To business owners and executives? What are some reasons for and against more public involvement? How might these decisions affect you? How do you think these decisions should be made?788views
Textbook QuestionContrast technology with science. Give an example of each to illustrate the difference.561views
Textbook QuestionIn the not-too-distant future, gene therapy may be an option for the treatment and cure of some inherited disorders. What do you think are the most serious ethical issues that must be dealt with before human gene therapy is used on a large scale? Why do you think these issues are important?523views
Textbook QuestionSCIENTIFIC THINKING Scientists investigate hypotheses using a variety of methods, depending on the circumstances behind the research. Human nutrition studies (such as those studying whether GMO foods have any health effects) are particularly problematic. Can you design a hypothetical human nutrition study to test whether GMO corn is less healthy than traditional corn? Can you identify real-world problems that may interfere with your design and confound your results?501views
Textbook QuestionThe fruits of wild species of tomato are tiny compared with the giant beefsteak tomatoes available today. This difference in fruit size is almost entirely due to the larger number of cells in the domesticated fruits. Plant biologists have recently discovered genes that are responsible for controlling cell division in tomatoes. Why would such a discovery be important to producers of other kinds of fruits and vegetables? To the study of human development and disease? To our basic understanding of biology?648views
Open QuestionDescribe why biologists often generate genetically modified organisms (GMOs) for research purposes.
Open QuestionExplain what qualifies the gene therapy method to cure sickle cell disease as an ex vivo approach.
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