Table of Contents
- 1 What is the proper order of proteins movement through the Endomembrane system and out of the cell quizlet?
- 2 What is the correct order of the movement of a newly synthesized protein that is to be secreted from the cell?
- 3 Where are membrane proteins synthesized?
- 4 How do molecules move across a cell membrane?
- 5 What is the function of membrane proteins in a membrane?
What is the proper order of proteins movement through the Endomembrane system and out of the cell quizlet?
Correct. Synthesized proteins move first to the RER, then through the Golgi for processing, and then travel to various destinations via vesicles.
What is the correct order of the movement of a newly synthesized protein that is to be secreted from the cell?
Smooth ER→ Rough ER → Golgi apparatus → Cell membrane.
What is the proper order of proteins movement through the endomembrane system and out of the cell group of answer choices?
Proteins destined to be secreted move through the secretory pathway in the following order: rough ER → ER-to-Golgi transport vesicles → Golgi cisternae → secretory or transport vesicles → cell surface (exocytosis) (see Figure 17-13).
Which of the following will move easily through the plasma membrane of the cell?
Oxygen is a small molecule and it’s nonpolar, so it easily passes through a cell membrane. Carbon dioxide, the byproduct of cell respiration, is small enough to readily diffuse out of a cell. Small uncharged lipid molecules can pass through the lipid innards of the membrane.
Where are membrane proteins synthesized?
the endoplasmic reticulum
Membrane proteins are synthesized on the ribosomal machinery of cells and then inserted into membranes. In eukaryotic cells, proteins are either first inserted co-translationally into the membrane of the endoplasmic reticulum, or post-translationally into membranes of mitochondria, the nucleus, or peroxisomes.
How do molecules move across a cell membrane?
Oxygen can easily diffuse across a cell membrane. Sugar can kind of, that’s why it’s assisted by a transporter protein to facilitate it. The proteins don’t move at all. 3. Temperature. Higher temps = molecules move faster.
What is the third mechanism for movement across the membrane?
Facilitated diffusion. A third mechanism for movement across the plasma membrane is facilitated diffusion. Certain proteins in the membrane assist facilitated diffusion by permitting only certain molecules to pass across the membrane. The proteins encourage movement in the direction that diffusion would normally take place,…
What happens when a peripheral membrane protein is synthesized in the ER?
If a peripheral membrane protein were synthesized in the lumen (inside) of the ER, would it end up on the inside or outside of the plasma membrane? The endoplasmic reticulum (ER) (Figure 4.4. 1) is a series of interconnected membranous sacs and tubules that collectively modifies proteins and synthesizes lipids.
What is the function of membrane proteins in a membrane?
Although the basic structure of biological membranes is provided by the lipid bilayer, membrane proteins perform most of the specific functions of membranes. It is the proteins, therefore, that give each type of membrane in the cell its characteristic functional properties.