6 & 7
Structure 6 is the Rough Endoplasmic Reticulum ( RER) while structure 7 is the Golgi apparatus.
Explanation:
The RER has ribosomes aligning its outer membrane (reason why it's referred to as called rough ER). The ribosomes manufacture polypeptide chains that enter the lumen of the RER. The polypeptide chains are properly folded using chaperones in the lumen of the RER and undergo post-translation modifications, These proteins then undergo Quality Control checks and the proper ones are allowed to proceed to the Golgi apparatus.
Proteins from the RER reach the Golgi apparatus through vesicles that bud off of the <em>trans</em> side of the RER then fuse with the <em>cis </em>side of the Golgi apparatus. The Golgi perform a few more modifications to the proteins including tagging them for delivery , then packages them. Vesicles carrying the proteins bud off of the <em>trans</em> side of the Golgi and get transported to their destination inside or outside the cell.
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Answer:Prion diseases occur when normal prion protein, found on the surface of many cells, becomes abnormal and clump in the brain, causing brain damage. This abnormal accumulation of protein in the brain can cause memory impairment, personality changes, and difficulties with movement.
Explanation: Hope this helps please mark me as brainliest
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Answer:
Th acceptable distance of tubulin monomers along a protofilament is : <u>A. 4nm</u>
Explanation:
MICROTUBULES are an important component of the cytoskeleton of eukaryotic cells. Its function is part of a structural role that helps define cell morphology, and also serves as an intracellular motor for some proteins such as kinesin and dynein.
For the correct formation of the structures called microtubules to occur, a process called polymerization is required. In this process there is a head-to-tail junction in which the dimer junction between tubulines forms a structure called protofilaments and those protofilaments run along the microtubule. Then, the other process occurs in which, by lateral interactions between the structures mentioned above , the wall of The microtubule will be completed.
