Limited time offer 20% OFF StudySoup Subscription details

AU - NTRI 2000 - NTRI 2000 Study Guide Exam 3 - Study Guide

Created by: Charity Barranco Elite Notetaker

> > > > AU - NTRI 2000 - NTRI 2000 Study Guide Exam 3 - Study Guide

AU - NTRI 2000 - NTRI 2000 Study Guide Exam 3 - Study Guide

0 5 3 88 Reviews
This preview shows pages 1 - 4 of a 25 page document. to view the rest of the content
background image 11/11/2017 OneNote Online https://tigermailauburn-my.sharepoint.com/personal/cnb0030_tigermail_auburn_edu/_layouts/15/WopiFrame.aspx?sourcedoc=%7BBC03224F-409F-… 1/19 Study Guide  Friday, November 10, 2017  1:16 PM  Intro to Proteins • Body is made up of thousands of proteins, many functions
• 4 kcal/g
• Recommended 10-35% of total kcal of protein
• Typical American diet is rich in protein
○ Focus on "meeting needs" is not necessary • Unlike carbs and lipids, proteins contain nitrogen (N) Amino acids Proteins are made of Amino Acids • Amino acids are the building blocks of proteins
• 20 different amino acids make up all the proteins
○ 9 essential
○ 11 nonessential
• Composed of C, H, O, and N
• Basic structure:
○ Central C
○ Amino acid (N containing)
○ Acid group
○ Side chain ( R )
 
background image 11/11/2017 OneNote Online https://tigermailauburn-my.sharepoint.com/personal/cnb0030_tigermail_auburn_edu/_layouts/15/WopiFrame.aspx?sourcedoc=%7BBC03224F-409F-… 2/19 • Branch chain amino acid ○ R-group has a branched structure
○ 3 examples in the human diet
• Leucine
• Isoleucine
• Valine
○ Used to fuel muscle (energy) during activity
○ Whey protein (from milk) is a rich natural source of BCAAs
• Essential AA ○ Cannot be synthesized by humans in sufficient amounts or at all, must be included in the diet
○ Needs highest during infancy (40%) and decline during adulthood (11% of total protein intake)
○ Limiting AA
• Essential amino acid in lowest concentration in diet relative to body needs ○ Conditionally essential amino acid • Some nonessential AA are made from essential amino acids Protein Synthesis and Organization • Proteins are held together by Peptide Bonds ○ When AAs bond, proteins are formed
○ The bond between AAs is called peptide bond
○ Bonds form between Amino
○  Group of one amino acid and acid group of another
• Most proteins are polypeptides, 50-2000 groups ○ Acids, enzymes and other agents can break these bonds (ie: during digestion) • Protein Synthesis ○ DNA contains coded instructions for protein synthesis within the nucleus of the cell. However, protein synthesis tales place in the cytoplasm. ○ Transcription • The process from DNA is coded into mRNA • mRNA: transcribed segment of DNA ○ Translation • The process where ribosomes read the mRNA code to produce a specific protein • tRNA: takes Amino Acid code to ribosomes ○ Protein synthesis requires energy
○ Order of amino acids in a protein determines its ultimate shape
background image 11/11/2017 OneNote Online https://tigermailauburn-my.sharepoint.com/personal/cnb0030_tigermail_auburn_edu/_layouts/15/WopiFrame.aspx?sourcedoc=%7BBC03224F-409F-… 3/19 ○ Proteins final shape determines its function in the body • If the AA sequence is mutated, final shape is disrupted, causes disease • Protein mutation ○ Sickle cell anemia: illness that results from malformation of RBC because of an incorrect structure in part of its hemoglobin protein chains • One amino acid found in hemoglobin is changed (glutamic acid -> valine -> change in protein organization -> disease state • Protein Denaturation ○ Alteration of a protein's three dimensional structure; loses biological activity • Heat
• Enzymes
• Acid/alkaline solutions
• Agitations
○ Cooking
○ Digestion- breaks down protein to make AAs available
background image 11/11/2017 OneNote Online 4/19   Proteins in Food Dietary protein ○ High quality (complete) protein • Provide all essential AA
• Mostly animal sources
• Support body growth and maintenance
○ Lower quality (incomplete) protein • Low or lack or more essential AA
• Plant sources (except soy and quinoa)
• Limiting AAs- the EAA that is in the lowest quantity
○ All or none principle: either all essential AA are present or none can be used
○ Complementary protein
• 2 or more incomplete proteins may be combined to make a complete protein (ex. Rice and beans, mac n cheese, PBJ) • If not complemented, incomplete protein are used for energy needs or converted to CHO or fat • Animal Protein Source (complete) ○ Contribution to American diet • 70% of our protein intake

This is the end of the preview. Please to view the rest of the content
Join more than 18,000+ college students at Auburn University who use StudySoup to get ahead
School: Auburn University
Department: Nutrition and Food Sciences
Course: Nutrition and Health
Professor: Ramesh Jeganathan
Term: Summer 2015
Tags: Proteins, energybalance, and weightcontrol
Name: NTRI 2000 Study Guide Exam 3
Description: Study guide on lecture notes
Uploaded: 11/11/2017
25 Pages 79 Views 63 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
Join StudySoup for FREE
Get Full Access to AU - NTRI 2000 - Study Guide - Midterm
Join with Email
Already have an account? Login here
×
Log in to StudySoup
Get Full Access to AU - NTRI 2000 - Study Guide - Midterm

Forgot password? Reset password here

Reset your password

I don't want to reset my password

Need help? Contact support

Need an Account? Is not associated with an account
Sign up
We're here to help

Having trouble accessing your account? Let us help you, contact support at +1(510) 944-1054 or support@studysoup.com

Got it, thanks!
Password Reset Request Sent An email has been sent to the email address associated to your account. Follow the link in the email to reset your password. If you're having trouble finding our email please check your spam folder
Got it, thanks!
Already have an Account? Is already in use
Log in
Incorrect Password The password used to log in with this account is incorrect
Try Again

Forgot password? Reset it here