What is the primary characteristic of peripheral membrane proteins? A: They cannot be post-translationally modified. B: They span the entire lipid bilayer, sometimes multiple times. C: Detergents or nonpolar solvents are necessary to remove them from the lipid bilayer. D:Weak intermolecular forces keep them attached to the lipid membrane.

If you did a classic Pulse-Chase experiment to follow the path of a secreted protein, and you forgot to do the Chase, which of the following would you observe?     No radioactivity would be seen in any of the structures.     Radioactivity would increase first in rough ER, then Golgi Complex, then secretory vesicles, but it would remain high in all, never decreasing.     Nothing would change     Radioactivity would increase in all 3 structures simultaneously and stay high.

Match the following structures with their definitions:  (1) Golgi apparatus (2) mitochondria (3) peroxisomes (4) cilia (5) endoplasmic reticulum (6) cytoskeleton (7) vesicles (8) ribosomes A. sacs that contain enzymes thatcatalyze a variety of specific biochemical reactionsB. structures on which protein synthesis occursC. structures that house the reactions that release energy from nutrientsD. a network of microfilaments and microtubules that supports and shapes a cellE. a structure that adds sugars to certain proteins and processes them for secretionF. membrane-bounded sacsG. a network of membranous channels and sacs where lipids and proteinsare synthesizedH. hairlike structures that extend from certain cell surfaces and wave about.

Why are newly synthesized lipids added to the cytosolic side of the bilayer and not the lumen side and how is this problem addressed?

If Kd= 100 nM, [RNA] = 10 nM, and [protein] = 1 uM a) What fraction of RNA is bound? b) What fraction of protein is bound? c) What is the concentration of the protein:RNA complex? d) Is it reasonable to assume that total protein = free protein? e) Is it reasonable to assume that total RNA = free RNA?

Consider two different proteins that are leaving from the Golgi in order to arrive in their common destination, a lysosome. In order for these two different proteins to be sent to the same place, what should they have in common? A) They must have the same primary structure B) They must have been imported into the cell by endocytosis. C) They must have the same tertiary structure D) They probably have the same glycosylation pattern. ..

1. List four classes of membrane-associated proteins and briefly describe the differences between them. 2. What are 3 types of modifications that can anchor proteins to the membrane? How do they link to the proteins they anchor?

What components are important for making a lipid membrane? please explain the answer and choice the right one  a)C. acyl carrier proteins b)B. signal sequences c)A and C d)A and B e)A. flippases

Membrane embedded Proteins: A) Why were the membrane embedded proteins important in the appearance of life? B) Why was it important to have a mechanism for the movement of molecules in to and out of the cell?  C) Describe the key structure and functional properties of the three types of cell membrane embedded transport proteins.

What TWO factors help to maintain integral transmembrane proteins securely fixed inside the lipid bilayer?