Glycoproteins and polypeptides that have carbohydrate groups added post-translationally, what is meant by the terms O-linked and N-linked? Where are these linkages likely to occur in human proteins?
Glycoproteins and polypeptides that have carbohydrate groups added post-translationally, what is meant by the terms O-linked...
In glycoproteins, to what three amino acids are carbohydrate groups most frequently linked? To what functional group is the glycan linked in each case?
Test yourself Many cell surface trans membrane proteins, called glycoproteins, have an attached carbohydrate group, 1. ich faces the extracellular space. This carbohydrate group is attached to the protein when it is still in the rER. Is the carbohydrate attached to the side of the protein that faces the lumen of the rERo the cytosol 2.Explain why the orientation of a transmembrane protein (i.e. which side of the protein faces the inside and which side faces the outside of the...
23. A protein called Ras is tethered (linked) to the plasma membranes of stem cells where it participates in signal transduction pathways that affect stem cell proliferation. Which of the following covalent modifications would be responsible for tethering (linking) the Ras to the membrane? A. Phosphorylation B. Glycosylation C. Lipid modification D. Ubiqutiylation E. Acetylation 24. What do transmembrane proteins in the peroxisome, nucleus, and mitochondria all have in common? A. They are all co-translationally inserted into the membrane B....
When a protein is co-translationally translocated into the ER it sometimes receives attachments of eight mannose residues, which are added to a core carbohydrate unit consisting of GlcNAc (N-acetylglucosamine). The mannose residues are trimmed down from a unit of eight to a unit of five either in the ER prior to transport to the Golgi, or in the cis-Golgi after transport The removal of three mannose residues can be detected using gel electrophoresis because proteins modified in this way will...
1. Please provide correct solution. Thank you.
Acid rain is a serious environmental problem. A sample of rainwater collected in the Sierra Mountains had an H+ concentration of 0.1 mmol/L. The pH of this sample was 0 1 3 4 100 Rank the elements carbon (C), hydrogen (H), oxygen (O), and phosphorus (P) in decreasing order number of covalent bonds they usually form. C > P > N > O >H P > O > C > N > H...
21: Met c aion of the Polamino 21. Which of the following would NOT Change the structure and function of a protein A Methylation of a protein B. Lipid modification of a protein C. Change in the length of the Poly A tail of the mRNA transcript encoding a protein D. Change in the position of reactive amino acids E. Proteolysis 22. Two peptides have almost the exact same primary structure, except that one has about 10 fewer amino acids...
1. Artificial flavors, colors, and commonly added to processed foods. that keep food fresh longer are non-nutritive chemical substances is the study of the intake of nutrients into the body and how the body processes and uses these nutrients. 3. Toxicity is most likely to occur with vitamins because they are stored in tissues composed of lipids and in the liver and are not carried easily into the bloodstream. 4. The best sources of complete proteins are meats and animal...
SHORT ANSWER QUESTIONS Part 1 Classes Abstraction: What is Abstraction in terms of representation? Specifically what choices does one make when creating a class that is an example of Abstraction? Encapsulation: What is encapsulation? What is information hiding? What does a public interface to a class consist of (not in the sense of actual java interfaces but what the client uses to manipulate objects of the class) What is an object of a class? What is the constructor? How do...
4. In a lake governed by the food web shown in the image to the right, 500 brown trout are added from fisheries. Which of the following outcomes would most likely be expected? A. Tadpole population will increase B. Duck population will decrease C. Algae population will increase D. Lilly Pad population will decrease E. Caddis Fly larvae will increase 5. Which of the following pieces of evidence most strongly supports a common ancestor of all life on Earth? A....
Questions on Metabolic Pathways & Energy balance
81 Match the items. #2 What can be said about the glycolysis pathway? a. Initial breakdown of carbohydrate b. Initial breakdown of fat C. Made by all three energy nutrients d. Removal of nitrogen from an amino acid e. Most ATP is produced a. requires oxygen. b. is the breakdown of pyruvate to acetyl COA. C. converts acetyl CoA into pantothenic acid. od results in the formation of pyruvate. 1. Electron Transport Chain...