The answer is D, a piece of a chromosome
ANSWER:
THE THREE LAW OF MOTIONS ARE LAW OF INERTIA, LAW OF INTERACTION & LAWW OF MASS AND ACCELERATION
- Law of Inertia - An object at rest and an object in motion stays in motion with the same speed and in the same direction.
- Law of Interaction - For every action, there is an equal but opposite reaction.
- Law of Mass and Acceleration - The acceleration of an object as produced by a net force is directly to the magnitude of the net force and inversely propotional to the mass of the object.
<em>F= ma ; a=F/m</em>
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wherein;
<em>F= Force (N)</em>
<em>m= mass (kg)</em>
<em>a= acceleration (m/s^2)</em>
Explanation:
The Exon Junction Complex (EJC) is a eukaryotic molecular machine that interacts with spliced mRNA upstream of exon-exon junctions, providing a binding platform for other trans-acting proteins that determine the fate of the mRNA. The spliceosome deposits the ~335kD EJC in a non-sequence specific manner 20-24 nucleotides upstream of an exon-junction. Functionally, the EJC aids in nuclear export of spliced mRNAs, assists in nonsense-mediated decay of incorrectly spliced mRNAs containing premature stop codons, and enhances translation efficiency.
Pre-mRNA bound by a spliceosome is usually not exported from the nucleus, so as to make sure that only fully-processed mRNA travels to the cytoplasm to be translated. A protein called the mRNP exporter binds to the EJC, both through RNA interactions and interactions with the EJC-associated protein REF (RNA export factor) to help pre-mRNA exit the nuclear pore complex.
Interestingly, the efficiency of unspliced mRNA export is dependent on the length; longer mRNAs are exported more efficiently than shorter mRNAs. In spliced mRNAs, however, once the 5' exon is long enough to bind the EJC, the length of the spliced mRNA does not affect the export efficiency.
There are a certain number of EJCs in a cell, and they must be recycled in order to continue tagging mature mRNAs. Once in the cytoplasm, the ribosome-associated regulator protein (PYM) acts as a dissociation factor.
Answer: The early earth environment was having hydrogen in abundant amount. the early atmosphere was full of methane, ammonia, hydrogen sulfide and water. Today the atmosphere contains 0.03% of carbon dioxide in the environment which was higher in the early days of life. There was no life because of less amount oxygen in the environment.
Now the environment is full of oxygen and has less amount of carbon.
Because a food web shows just exactly what eats what rather than put them all into a category.
