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:
Oxygen
Explanation:
Oxygen is the last electron acceptor in the electron transport chain, which considers oxidative phosphorylation. Without oxygen, the electrons will be upheld, in the long run causing the electron transport chain to stop. This will make the results of glycolysis go through aging as opposed to going to the citrus extract cycle. Without oxygen, oxidative phosphorylation (the electron transport chain) is inconceivable, however substrate-level phosphorylation (glycolysis) proceeds.
Answer:
Competition is an interaction between organisms or species in which both the organisms or ... According to evolutionary theory, this competition within and between species for resources is important in natural selection. However, competition may ... Competition can cause species to evolve differences in traits.
Answer:
correct Answer: E Which of the following lists the layers of the epidermis in thick skin in the correct order from deep to superficial? correct Answer: Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum Match the following epidermal cell type with its function: Melanocytes.
Explanation:
Answer:
The correct answers are:
protein serving is too large
grains are not represented
and the vegetable serving should be larger.
Explanation:
