Alternative RNA splicing allows which of the following? Production of proteins o

Question

Alternative RNA splicing allows which of the following? Production of proteins of different size or function from the same pre-mRNA Production of similar protons from different pre-mRMAs Reverse translation from mRNAs Increased rate of translation for all RNAs Looser packaging of chromatin and increased transcription You are studying a bacteria, and notice that under the conditions you examined, a certain gene is not expressed into protein. However, you find that the gene is actively transcribed. Why would the cell bother to carry out this step and not translate the resulting mRNA? This species lacks ribosomes and is incapable of translation translation is not necessary for decoding an mRNA into a protein This allows quicker response time in case conditions change and the gene product is needed this is a waste of resources, and a cell would never behave this way The cell must be infected by a virus that is blocking translation Your friend claims that plants will grow better if excess oxygen is removed from the environment. What best explains this claim? Excess Oxygen Gas will cause the Plant to inflate, and fly away like the house from the movie Upl Oxygen can bind to the active site of the enzyme Rubisco, interfering with the Calvin cycle and the Plant's ability to store Excess Oxygen forces a cell to switch to fermentation, and plants are damaged when they produce Ethanol The friend is wrong Oxygen has no harmful effects on plants Excess Oxygen causes Carbon atoms to gain protons and become Nitrogen atoms

Explanation / Answer

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Answer 1: Choice 1 (The alternative mRNA splicing is performed on a single mRNA molecule and involves splicing/cutting of the mRNA at different positions to yield mRNA sequences of different sizes. These different mRNAs will be translated to yield proteins of different sizes and functions. This explains the protein variability and vast variation in an individual.)

Answer 2: Choice 5 (Bacteria or any organism would never perform transcription if translation is not to be carried out because both of these processes are energy consuming in nature. Also, bacteria cannot perform alternative splicing so it cannot change the nature of product based upon need. The only feasible explanation is infection or pathology which impairs translation in bacteria)

Answer 3: Choice 2 (Oxygen toxicity has been known to cause harmful for some enzymes such as RuBiSCO, aldolase, glutamate decarboxylase etc which can cause damage to normal metabolic cycles of a plant and damages.)

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