Integrins are singlepass integral membrane proteins in the p

Integrins are single-pass integral membrane proteins in the plasma membrane of animal cells and are involved in the interaction of the cell with the surrounding extracellular matrix. Which of the following descriptions do you think matches the transmembrane of an integrin molecule? It is about 100 amino acids long. It folds in a conformation with maximal intrachain (polypeptide backbone) hydrogen-bonding. It is an alpha-helix that has a bend in the middle. It is about 10 amino acids long, with every other amino acid side chain being hydrophobic. It forms a -barrel. For which of the following ions is the intracellular concentration typically higher than the extracellular concentration? Sodium Potassium Chloride Calcium Magnesium Imagine a small synthetic vesicle made from pure phospholipids enclosing an interior lumen containing 1 mM glucose and 1 mM sodium. If the vesicle is placed in pure water, which of the following happens faster? Sodium ion diffuses out. Chloride ion diffuses out. H_2O diffuses in. Glucose diffuses out. Sodium Chloride diffuses out. This family of ATPases is structurally related to the turbine-like pumps that acidify lysosomes and vesicles; however they usually function in reverse, generating ATP from ADP and P_1 using proton gradients across membranes. What are they called? V-type pumps ABC transporters F-type pumps P-type pumps Permeases

Solution

Answer4:

The size varies but typically the - and -subunits contain around 1000 and 750 amino acids, respectively.
The part of the protein that is embedded in the hydrophobic regions of the bilayer are alpha helical and composed of predominantly hydrophobic amino acids.Since most residues in helices are involved in short-range intra-chain contacts.

So answer is it folds into confirmation with maximal intrachain hydrogen bonding

Answer5:

Intracellular potassium concentration is high

Answer6:

there is a higher concentration of dissolved salt outside of the cell (a hypertonic environment), then H20 will diffuse \"out\" from the cell and the cell will dehydrate and shrink and cellular metabolism will cease. This phenomenon is called plasmolysis and it is the reason why foods can be preserved with high concentrations of salt and sugar.

So answer is water diffuses in

Answer 7:

V-type pumps are involved in ATP synthesis in vesicles

So answer is V-type pumps