BIOLOGY 2EE3 Lecture Notes - Lecture 7: Endoplasmic Reticulum, Secretion, Protein Folding

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gunnergang

15 Jun 2022

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Chapter 3: the morphology of typical eukaryal cells, diversity of eukaryal microbes - model microbes. Interactions between eukaryal microbes and animals, plants and the environment. The morphology of typical eukaryal cells: have membrane-bound nucleus, 10-100 um larger than bacterial/archaeal cells, contain intracellular compartments (organelles, may possess a cell wall structure, complex internal cytoskeleton in place, flagellum. Endoplasmic reticulum and golgi apparatus: proteins are directed to organelles by a signal sequence, some proteins directed to secretory pathway in. Er/golgi apparatus: rough endoplasmic reticulum is a site of translation and protein folding, golgi apparatus modifies, sorts and transports proteins. Uses cellular respiration to produce atp via the electrochemical proton gradient: double membrane bound organelle. Cytoskeleton: provides shape and support to eukaryotic cells, and directs movement of material within the cell, very different composition to bacteria, 3 major structures, microtubules (dynamic, microfilaments (dynamic)

Related Questions

You study a transmembrane protein that is trafficked through theendoplasmic reticulum but ultimately âlivesâ in the plasmamembrane. Suppose the domain of this protein which is exposed onthe outer face of the endoplasmic reticulum membrane was covalently(and specifically) labeled with a fluorescent dye in a living cell.When the protein is distributed among cellular compartments, wherewould you expect the dye to be located?

Question 7 options:

A) The dye will be on the outer face of the endoplasmicreticulum, on the inner face of the Golgi apparatus, and on theextracellular face of the plasma membrane.

B) The dye will be on the inner face of the endoplasmicreticulum, on the inner face of the Golgi apparatus, and on theintracellular face of the plasma membrane.

C) The dye will be on the outer face of the endoplasmicreticulum, on the outer face of the Golgi apparatus, and on theintracellular face of the plasma membrane.

D) The dye will be on the outer face of the endoplasmicreticulum, on the outer face of the Golgi apparatus, and on theextracellular face of the plasma membrane.

Eukaryotic cells manufacture fibrous cytoskeletal proteins thatfunction in the cytoplasm to maintain cell shape by providingstructural support, move materials within the cell, and move theentire structure. Which of the following predictions about proteinsynthesis, processing, and trafficking applies to the general classof cytoskeletal proteins?

Question 8 options:

A)	They would be glycosylated in the Golgi apparatus.

B)	They might travel to the nucleus in a transport vesicle with aspecific zip code.

C)	They would initially contain signal sequences that would allowtheir entrance into the endoplasmic reticulum.

D)	They would be manufactured on free ribosomes in thecytoplasm.

turquoisecoyote785

please fill in the blanks with the words given:

The ____________ Golgi apparatus is a series of membranous organelles that work together and communicate by means of transport ____________ vesicle(s).

These ____________ vesicle(s) can fuse readily with other organelles because they each contain membrane associated ____________ endoplasmic reticulum that enable communication.

For example, a protein that is synthesized is first transported to the ____________ endomembrane system, then moves to the ____________ endoplasmic reticulum via a ____________ Golgi apparatus.

This vesicle fuses readily with the ____________ proteins because the ____________ on the membrane target the ____________ on the ____________ 's membranes.

In this manner, endomembrane ____________ proteins are able to fuse readily with various organelles.

word choices:

golgi apparatus

endoplasmic reticulum

vesicle(s)

proteins endomembrane system

Describe how eukaryotes package their gene products. KEY ---- USE THESE WORDS --- ribosome, rough endoplasmic reticulum, smooth endoplasmic reticulum, transport vesicle, golgi apparatus, cis face, trans face.

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BIOLOGY 2EE3 Lecture Notes - Lecture 7: Endoplasmic Reticulum, Secretion, Protein Folding

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