In an experimental situation, a student researcher inserts an mRNA molecule into the cytoplasm of a eukaryotic cell after she has removed its 5' cap and poly-A tail. Which of the following would you expect her to find?

a) The mRNA attaches to a ribosome and is translated, but more slowly.

b) The cell adds a new poly-A tail

c) The mRNA is quickly spliced into an mRNA containing a 5

The mRNA would most likely be degraded by nucleases in the cell cytoplasm

Explanation:

The 5'cap on an mRNA strand is necessary to bind ribosomes when the mRNA is being transcribed it also:

The poly-A tail helps to:

Without the cap and tail the mRNA is just a free ranging strand of nucleotides that the cell will try to clean up.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

it is called the mitotic spindle