Answer:
The correct answer is that the spliceosome is non-functional.
Explanation:
A spliceosome refers to a composite and large molecular apparatus found mainly inside the nucleus of the eukaryotic cells. The prime function of the spliceosome is to remove the introns from a transcribed pre-mRNA, that is, a kind of primary transcript.
In case if the spliceosome machinery gets failed to function, the mRNA will not remove the introns, that is, the non-coding parts and retains it. This will eventually lead to the formation of longer mRNAs.
Answer:
Answered below
Explanation:
Cell membranes are barriers which protect and regulate the movement of substances in and out of the cells. It is a semi-permeable and selective structure.
In the passive transport system, substances move along a concentration gradient and it doesn't require energy. The examples of passive transports include; simple diffusion which transports carbon dioxide and oxygen, osmosis and facilitated diffusion which transports charged molecules like ions, sucrose etc.
In active transport, substances move against the concentration gradient. This requires energy. The two main types are: primary active transport, which uses direct metabolic energy e.g Na+/K+ pump, and the secondary active transport system which couples the transported molecules with another molecule moving along the gradient, example the Na+/glucose transporter.
Answer:
Developed vaccine for rabies virus.
Explanation:
Louise Pasteur was the french chemist and microbiologist who is known for his discoveries of pasteurization, fermentation and vaccination invention.
Pasteur is known for developing a vaccine for rabies and anthrax. He produced the rabies vaccine by infecting rabbits with rabies virus and harvesting the attenuating virus from nerve tissue of rabbits.
The development of rabies and anthrax vaccine by Pasteur helped in saving the lives of many people. Therefore his work with rabies produced vaccine for the deadly rabies virus.
I would say the answer would be D.
Because: If a river is dammed then there is little to no flow going downstream. This will effect the life downstream and also change its conditions.
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