DTN102 Lecture Notes - Lecture 3: Ionic Bonding, Globular Protein, Hydrogen Bond

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tanjackal830

5 Mar 2019

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Functions in the body and food sources of proteins: protein has many functions in the body including growth and maintenance, enzymes, hormones, regulation of fluid balance, acid base regulation, transport molecules, antibodies, and as an energy source. Food sources of proteins include animal proteins such as meat, milk, fish, and eggs and plant source such as legumes, and nuts. Proteins perform a range of functions in foods: hydration, browning, denaturation/coagulation, enzymatic reactions, thickening, buffering. Examples are collagen in connective tissue and tendons, and keratin in wool, hair, and nails: globular proteins, which are soluble. An example is insulin, a hormone involved in glucose metabolism and controlling blood glucose levels: myoglobin and haemoglobin, involved in oxygen transport. Types of bonding: hydrogen bonds, covalent bonds, disulphide bonds/links (important in protein structure, dispersion forces/hydrophobic interactions, dipole-dipole forces, van der waals forces. Includes a simple view of ionic bonding and the way you need to modify this for a"level purposes.

Related Questions

question 1

What would be the best guideline to a healthy diet according to your instructor which is validated by other resources.

	1.	Eat organic foods and primarily non-GMO foods.
	2.	Eat all your meals at home.
	3.	Eat a variety of foods.
	4.	Eat a vegetarian diet.

5.00000 points

QUESTION 2

A complete protein has all the 20 amino acids: 9 are essential for our body to consume and 11 our body makes on its own. We need 9 + 11 = complete protein to build muscle, repair cells, keep our immune system working properly, etc.

True

False

5.00000 points

QUESTION 3

It shouldn't be hard to reverse the GMO guidelines in this county.

True

False

5.00000 points

QUESTION 4

Out of a variety of foods you could eat, which one will make you feel the most full?

		Milkshake
		Salad
		Hamburg
		Beer, wine or hard liquors

5.00000 points

QUESTION 5

Which food has been identified as the food that cultures and people who have lived a very long life have always had in their diet?

		Chocolate
		Vegetables
		Whole grains
		Beans

5.00000 points

QUESTION 6

When we eat animal products: fish, turkey, chicken, duck, pork, beef, eggs, etc., these proteins when cooked give the body all the amino acids it needs to do the bodily functions that are dependent on protein.

True

False

5.00000 points

QUESTION 7

Trying new foods has value. Different foods gives the body more nutrition than having the same foods everyday. Your perception of food does change, thus how many times do you recommend to your family and friends to try a food they may not normally like throughout their life?

		2-3
		90-100
		7-8
		20

5.00000 points

QUESTION 8

Supplements should be taken with caution because they are unregulated by the FDA, they do not fall in the category of being food or medication.

True

False

5.00000 points

QUESTION 9

There is little scientific evidence that organic foods are more nutritious than conventionally grown foods.

True

False

1. What is an organic molecule?

2.Name three hydrocarbons and be able to draw their structural formulas.

3. What is an isomer? List and describe the three types (structural, geometric, and enantiomers).

4. Be able to recognize and describe the properties of these functional groups: aldehyde, ketone, hydroxyl, sulfhydryl, carboxyl, amino, and phosphate groups.

5. What is a monosaccharide? Give two examples of these molecules and their functions.

6. Describe these chemical reactions: dehydration synthesis (condensation reaction) and hydrolysis (rehydration).

7. What is a disaccharide? List two and give their functions.

8. What is a polysaccharide? List two storage forms and two structural forms. How are they formed and what is their specific function?

9. How do the pancreatic hormones insulin and glucagon regulate blood sugar levels?

10. What is molting and why is it necessary in certain animals?

11. What four molecules are bonded together to form a triglyceride or fat? Why are fats nonpolar? What are some functions of fats as well as other lipids such as oils and waxes?

12. How do saturated and unsaturated fats differ? Discuss bonding patterns and possible sources of these fats. Which type is healthier for you? Why?

13. Why do animals store most of their excess glucose as fats or oils rather than as glycogen or protein? Give two reasons.

14. What are phospholipids? Identify parts of the phospholipid bilayer that are hydrophobic or hydrophilic? What important cell structure do these molecules help create?

15. Describe the structure of a steroid. How is cholesterol used in beneficial ways in your body?

16. What are LDLs and HDLs? Which is considered good or bad cholesterol? What condition could result from high blood pressure?

17. What are four ways to either reduce high blood cholesterol or maintain a safe level?

18. What is the composition of an amino acid? Why would they be considered nonpolar, polar, acidic, or basic?

19. Define dipeptides and polypeptides.

20. Describe the primary structure of a protein. What type of bonding creates it?

21. What is the secondary structure of a protein? Name two types of secondary structure and indicate what type of bonding holds them together. List three fibrous proteins.

22. What is the tertiary structure of a protein? What types of bonds or chemical interactions allow a protein to maintain this structure? List three globular proteins.

23. What is the quaternary structure of a protein? Describe a hemoglobin molecule.

24. What are the subunits of nucleic acids and what is their composition? How are these subunits bonded together? What is DNS's basic shape?

25. List three differences between DNA and RNA.

DTN102 Lecture Notes - Lecture 3: Ionic Bonding, Globular Protein, Hydrogen Bond

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