Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Protein (Home Ec)

TermDefinition
Chemical composition of protein Carbon, Hydrogen, Oxygen, Nitrogen
Chemical Structure of an amino acid H H O ' ' '' H-N--C--C ' ' R OH
NH2 Amino group - acidic
COOH Carboxyle group - acidic
Named amino acid Glycine: R is H
Peptide link Acidic group reacts with alkaline group: loss of a water molecule (-H2O)CONDENSATION REACTION
Dipeptide link Carbon + nitrogen join and H2O is gone
Hydrolysis Polypeptide chains - amino acids water molecule gained (digestion)
Non-essential amino acids Produced in body in sufficient quantities eg. glycine, cystine, cysteine : Mainly plant sources
Essential amino acids Need to be taken in through food - noit produced in body in sufficient quantities: eg. lycine, luceine, phenylalinine, isoluceine. Mainly animal foods (except soya beans)
Complementary protein Beans on toast Bread: +methionine -lycine Beans: -methionine +lycine
Primary Structure Primary: no. and arrangement of amino acids in polypeptide chain (eg.insulin)
Secondary Structure Folding of polypeptidse chains : cross links -Disulphide link (2 sulphur molecules join) eg. cysteine -Hydrogen link: Hydrogen in 1 polypeptide chain + oxygen in another (e
Tertiary structure -Fibrous: straight(non-elastic)/coiled or zigzag(elastic) -Globular: water soluble, easily denatured, round or spherical
Classification: Animal simple Fibrous:collagen, elastin (connective tissue in meat) Globular: Lactalbumin (milk), ovalbumin (egg)
Classification:Plant simple -Glutenins: gluten (wheat), Oryzenin (Rice) -Prolamines: Zein (corn), Gliaden (wheat)
Classification: conjugated -Lipoproteins (emulsifiers) :casein (milk), lecithin(egg) -Chromoproteins (coloured) : myoglobin. haemoglobin -Phosphoproteins: casein, lecithin -Nucleoproteins : chromosomes (cell nuclei)
Properties solubility,elasticity,denaturation(heat/agitation/chemicals) maillard reaction(non-enzymic browning: amino acids + carbohydratew + dry heat = brown colour), moist heat(collagen-gelatine), gel formation(Gelatine: gel,sol,solid), foam formation (egg white)
Structural Functions -growth and repair -new cells, tissues, muscles, skin
Physiologically active Functions -enymesa, hormones, antibodies, nucleoproteins, plasmaproteins
Nutritive Functions -heat and energy -amino acids
deficiency 1. Delayed healing of wounds, retarded growth 2. malfunctioning of body organs and systems, susceptibility to illness/infection 3. lack of energy, marasmus/kwashiorkor
deamination excess protein-liver +NH2-ammonia-urea-urine +COOH-oxidised-heat/energy
digestion +stomach: -pepsin - protein - peptones -rennin - caseinogen - casein -gastric juice (acid) - denatures +duodenum: trypsin(pancreas) - proteins - peptides +small intestine: peptidase - peptones - amino acids
Created by: LauraBcooke
Popular Biology sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards