The nucleus!
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Mosasaurs were large marine reptiles that resembled a cross between a crocodile and a giant iguana. Completely dying out of these can be the illustration of extinction.
<h3>What is extinction?</h3>
Extinction is the dying out of a particular species. Extinction has an important role in evolution as it opens opportunities for emerging of new species.
The mosasaurs have completely died out after a big asteroid impact caused Earth to drastically change. This can illustrate extinction.
Thus, the correct answer is extinction.
For more details regarding extinction, visit:
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Answer:
1) False
2) False
3) True
4) True
5) False
6) True
7) False
Explanation:
I think these are all correct! Can you please give me a brainly? Have an amazing day/night!!
Answer:
The volume of the cell will remain same.
Explanation:
The cell is surrounded by a solution that has same concentration of solute particles as the cytosol inside.That means the cytosol of the cell is isotonic to the solution in which the cell is kept.
As a result the cell will neither swells nor shrinks and the volume of the cell remains constant.
Answer:
Basically the translation of CK-B protein is inhibited in the U937D cells, despite the fact that the CK-B protein is bounded to the ribosomes. This is because(<u>mechanisms)</u> the translation is inhibited by the binding of translational repressors to the 3’UTR of the CK-B mRNA rather than the actual CK-B mRNA 3'UTR.
Furthermore, the soluble protein inhibitions is due to the reaction of the U937 cells to the short RNA sequences with the 3’UTR.
<u>The introduction of these sequences(shot segement of RNA) </u>into the U937D cells leads to CK-B synthesis. This makes 3’UTR sequences to bind to the translational repressor proteins, thus preventing them from binding to the CK-B mRNA
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COMPLETED QUE.
A common feature of many eukaryotic mRNAS is the presence of a rather long 3' UTR, which often contains consensus sequences. Creatine kinase B (CK-B) is an enzyme important in cellular metabolism. Certain cells—termed U937D cells—have lots of CK-B mRNA, but no CK- B enzyme is present. In these cells the 5’ end of the CK-B mRNA is bound to ribosomes, the mRNA is apparently not translated. Something inhibits the translation of the CK-B mRNA in these cells. Researchers introduced numerous short segments of RNA containing only 3’UTR sequences into U937D cells. As result, the U937D cells began to synthesize the CK-B enzyme, but the total amount of CK-B mRNA did not increase. The introduction of short segments of other RNA sequences did not stimulate the synthesis of CK-B; only the 3’UTR sequences turned on the translation of the enzyme. Based on these results, <u>purpose a mechanism for how CK-B translation is inhibited in U937D cells. Explain how the introduction of short segments of RNA containing the 3'UTR sequences might remove the inhibition.</u>
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Explanation:
