In determining the structure of ribozymes, why was it important that ribozyme sequences could be transcribed in vitro?
What will be an ideal response?
Wild-type and mutant RNA sequences could be transcribed in vitro in large quantities. Purified wild-type and mutant RNAs could be crystalized and evaluated.
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The Cambrian Explosion provided a wealth of fossil remains for scientists to uncover. Many of the animals from this time period had tough skins or shells. This would
a. protect the animal from osmotic pressure. b. be a disadvantage for these organisms and lead to their death and fossil formation. c. protect the animal from predators. d. make these animals more desirable to predators. e. allow the animals to move into different environments easily.
How did the development of anonymous markers aid in the production of a human genetic map?
A. Anonymous markers are genetic markers that cause a detectable phenotype and can't be detected by molecular techniques. The markers correspond to specific and unique chromosomal regions, thereby allowing for the identification and ordering of particular segments of DNA. Such information was essential to the generation of a human genetic map. B. Anonymous markers are genetic markers that do not cause a detectable phenotype, but can be detected by molecular techniques. The markers correspond to specific and unique chromosomal regions, thereby allowing for the identification and ordering of particular segments of DNA. Such information was essential to the generation of a human genetic map. C. Anonymous markers are genetic markers that do not cause a detectable phenotype, but can be detected by molecular techniques. The markers correspond to specific and unique genetic regions, thereby allowing for the identification and ordering of particular segments of the chromosome. Such information was essential to the generation of a human genetic map.
When Nitrobacter utilizes nitrite produced from ammonia by Nitrosomonas to obtain energy by converting the nitrite to nitrate, the relationship between the two organisms is ________.
A. mutual B. commensal C. amensal D. parasitic
What is the most efficient way to regulate gene expression from the perspective of cellular resources?
What will be an ideal response?