The following are MAIN functions of protein in the body, EXCEPT:- ○ Proteins form the enzymes needed for metabolic processes.- ○ Proteins form the key components of the immune system, such as antibodies.- ○ Proteins are responsible for transporting large molecules, like triglycerides, in the blood.- ○ Proteins form hormones, such as insulin and epinephrine.- ○ Proteins are the main fuel for most anaerobic exercises, like sprinting.

Proteins form the enzymes needed for the metabolic processes responsible fo the synthetis of Amino…

Answered: The following are MAIN functions of…

Ebk:Nutrition & Diet Therapy

10th Edition

ISBN:9780357391747

Author:DEBRUYNE

Publisher:DEBRUYNE

Chapter5: Protein

Section: Chapter Questions

Problem 4SC

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Which of the following statements about amino acids is/are incorrect? 1. Standard amino acids are so named because these are the only amino acids there are. 2. Essential amino acids can be synthesized by the organism. 3. All standard amino acids are optically active. 4. Overall, naturally occurring amino acids are equally likely to be found having either an R or S configuration around the alpha carbon. O 1, 3, and 4 O 1, 2, 3, and 4 1 and 2 O 1, 2, and 3
Which of the following about the glycosylation of proteins in the ER is false? Dolichol phosphate serves as a lipid carrier. Oligosaccaryltransferase add the oligosaccharide to the protein. The oligosaccharide ‘tree’ is made up of glucose and mannose. Asn-X-Ser/Thr serves as the glycosylation site on the protein. Carbohydrates are added to the lipid carrier by glycosyltransferases.
Some amino acids are synthesized by replacing the keto group (CO) of an organic acid known as an α-keto acid with an amino group (CNH+3). Identify the amino acids that can be produced this way from the following α-keto acids:
Classify each of the amino acids below. Note for advanced students: none of these amino acids are found in normal proteins. + H3N -CH-COO H3N CH-COO H3N CH COO CH2 CH NH3 CH2 S CH2 CH3 CH3 (Choose one) (Choose one) (Choose one) ▼ nonpolar polar neutral H3N —CH CAO HƠN CH COO polar acidic polar basic CH2 COO CH2 CH2 H3C CH3 NH2 (Choose one) (Choose one) (Choose one)
Terpenes are a class of lipids based on the isoprene molecule and are typically incorporated into complex molecular structures. Which of the following molecules 3. a) b) retinal vitamin K vitamin E phosphatidic acid coenzyme Q lonile The steroids are lipids with a variely of different functions in cells that have structures based upon the steroid nucleus. Sterolas that have cholesterol as a precursor but do not function as hormones include: a) myristic acid, palmitic acid b) glucocorticoids, mineralocorticoids tristearoylglycerol, trioleoylglycerol cholic acid, deoxycholic acid sphingomyelins, glycosphingolipids c) d) e)
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Proper folding is essential for most proteins to function. Which of the following statement about protein folding are correct. There may be more than 1 right answer. a) changing the primary sequence will change the final conformation b) desaturation results in a protein that has a higher free energy than the native conformation c) protein spontaneously fold into their correct shape d) denatrutation will cause a protein to lose its tertiary structure
The common amino acids are polyprotic acids. All amino acids contain an amino group and a carboxyl group. Some amino acids contain ionizable side chains. The presence of an ionizable side chain creates a third ionizable group. For a diprotic amino acid such as glycine (structure shown below), three forms are possible. These forms, the fully protonated (AA*), single deprotonated (AA°), and completely deprotonated (AA) exhibit different acid-base properties. NH;+ NH,+ NH, Neutral H,A (AA+) A- (AA•) (AA-) The Ka describing the AA* and the AA° equilibrium is 4.57 x10-3, while the Ka involving AA° and the anionic form AA- is a much smaller 2.51 x 10-10, The neutral form, AA° is referred to as isoelectric glycine. All amino acids can assume the isoelectric form under proper conditions. a. Calculate the pH of a 0.1 M solution prepared from the salt glycine hydrochloride (hint: use ICE table).
Describe as completely as possible, the four levels of protein What type of bonds hold a protein together at the primary level? What type of bonds maintain the protein at the secondary and tertiary level? Give an example of secondary, tertiary, and quarternary level proteins. At which level is the protein functional? What happens (at a molecular level) when a protein is denatured?
Which of the following statements about amino acids is/are incorrect? I. The formation of a dipeptide from two amino acid molecules leads to a loss of a water molecule. II. All standard amino acids can be synthesized by the organism. II. All essential amino acids are optically active. IV. Overall, naturally occurring amino acids are equally likely to be found having either an R or S configuration. V. All standard amino acids are neutral at physiological pH. II, IV, and V II, III, IV, and V II, III, and V O , I, and II O , II, and V
Which of the following levels of protein structure may be affected by hydrogen bonding? (a) primary and secondary (b) primary and tertiary (c) secondary, tertiary, and quaternary (d) primary, secondary, and tertiary (e) primary, secondary, tertiary, and quaternary
Lactose in milk is hydrolyzed, absorbed through the intestines, and then utilized for energy metabolism. Oligosaccharides that are not hydrolyzed in the digestive tract cannot be absorbed nor used for energy. Choose the best explanation for why these oligosaccharides would be necessary in human milk (or infant formula). A) These oligosaccharides prevent weight gain in infants. B) These oligosaccharides absorb excess energy, allowing infants to sleep. C) These oligosaccharides train the digestive tract to tolerate high levels of sugars, necessary for a typical adult American diet. D) These oligosaccharides provide fiber and prevent constipation.

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