Transcription takes place in the in this process, an enzyme called unzips and adds new nitrogenous bases to the template strand to create a new strand of this new strand has one difference in the base pair rules. in dna, adenine pairs with in mrna, adenine pairs with

Answers:

Transcription takes place in the nucleus of the cell.In this process, an enzyme called RNA polymerase unzips approximately 14 base pairs of DNA and adds new nitrogenous bases to the template strand to create a new strand of mRNA.This new strand has one difference in the base pair rules. In DNA, adenine pairs with Thymine.In mRNA, adenine pairs with Uracil.

Explanation:

Transcription is the first step of expression of DNA into the protein product. During transcription, the DNA is replicated in the form of RNA (Ribo nucliec acid). It takes place in the nucleus of the cell while the second step of gene expression, translation takes place in the cytoplasm of the cell.

Once the transcription is completed, all the information of a particular DNA segment is obtained in form of RNA segment. RNA contains exactly the same genetic information as contained by DNA, the difference is it has base Uracil in place of Thymine.

The general steps of the translation are six:

An enzyme called RNA polymerase unwinds or unzips a certain segment of DNA.This unwinding occurs at a specific site called promoter region and forms transcription bubble.The enzyme RNA polymerase starts to add RNA nucleotides that are complementary wit the specific region of DNA>RNA nucleotides form the bonds with each other to form a complete sequence of RNA.The newly synthesized RNA strand detaches from DNA template Rewinding of DNA occurs and mRNA is ready to go into the next stage of gene expression called Translation.

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Environmental science studies the interactions between the physical, chemical, and biological components of the environment, including their effects on all types of organisms. earth science (also known as geoscience), is an inclusive term for all sciences related to earth (geology, meteorology, oceanogr maphy, etc).  although environmental and earth science cover essentially the same material, environmental science places greater emphasis on the biological realm, while earth science places greater emphasis on the physical realm.    environmental and earth science study the interactions of four major systems or “spheres” (figure 8.6).  the  geosphere  consists of the core, mantle and crust of the earth.the  atmosphere  contains all of the earth’s air and is divided into troposphere, stratosphere, mesosphere, thermosphere and ionosphere.the  hydrosphere  contains all of the solid, liquid and gaseous water on earth, extending from the depths of the sea to the upper reaches of the troposphere where water is found.  ninety-seven percent of the hydrosphere is found in salty oceans, and the remainder is found as vapor or droplets in the atmosphere and as liquid in ground water, lakes, rivers, glaciers and snowfields.  the  biosphere  is the collection of all earth’s life forms, distributed in major life zones known as biomes:   tundra, boreal forest, temperate deciduous forest, temperate grassland, desert, savannah, tropical rainforest, chaparral, freshwater, and marine.although the four systems have their unique identities, there is substantial interaction between them.  environmental scientists study the effects of events in one sphere on the other spheres. for example, a volcanic eruption in the geosphere may cause profound direct and indirect effects on the hydrosphere, atmosphere and biosphere as follows: example 1 (volcano)    on may 18, 1980, mount saint helens, in the state of washington, erupted.  this event altered the surrounding environment, and provided scientists with an opportunity to study the effects of volcanic eruptions on the geosphere, hydrosphere, atmosphere and biosphere.  such studies are vital because volcanic eruptions will continue to occur, and will have increasing impact on humans as people continue to settle lands closer to dormant volcanoes. the following are but a few of the myriad of interactions resulting from a volcanic