please help with 2, 3, 4, 5 and 6 1. No identification images of the organelles
ID: 220006 • Letter: P
Question
please help with 2, 3, 4, 5 and 6
1. No identification images of the organelles that was done last test. However, be aware of the organelles themselves & their major functions 2. Why are so many cellular organelles folded? 3. What is nuclear transport? What is being transported? 4. Describe an RNA molecule's path from its nuclear exit to its product's cellular exit via the secretory pathway. 5. What are some cytoskeletal elements, and what are some of their functions? 6. How is the internal structure of the mitochondria organized?Explanation / Answer
2. Many cellular organelles are folded in order to increase the surface area, create pockets for specific activity, and create microenvironments inside the organelle. Examples of these organelles are mitochondrion and endoplasmic reticulum.
3. Nuclear transport is the entry and exit of small as well as large molecules through the nuclear pore. The transport is normally diffusion of small molecules, but highly regulated by nuclear pore complexes for large molecules.
Proteins, transfer RNA, mRNA and assembled ribosomal subunits are usually transported.
4. RNA transport from the nucleus to the cytosol is fundamental for gene expression. The different RNAs are exported through the nuclear pore complexes via mobile export receptors. rRNAs and mRNAs are assembled into complicated ribonucleoproteins and recruit receptors via class-specific adaptor proteins. After binding with ribosomes, translation starts resulting in protein synthesis. Finally RNA molecules are degraded by exosomes.
5. Cytoskeleton is made up of filamentous proteins and has major three elements namely microtubules, intermediate filaments and actins filaments. These elements give the cell its shape and help organize the cell's parts. Also, they provide a possible machinery for movement and cell division.
6. The mitochondrion has two membranes; the inner membrane is folded to create a structure called cristae which is the site for a portion of the cellular respiration process. The folds in this organelle also provide more surface area for this chemical process to occur. The inner membrane of mitochondria is folded to create a larger surface area, which allows more space for enzyme attachment during respiration. Mitochondria are the site where adenosine triphosphate (ATP) is produced during respiration.