BIOL130L Study Guide - Midterm Guide: Copper(Ii) Oxide, Biuret Test, Iodine Test
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please i need help with this qustions answer the multiple choice that is all and be clear not writes un clear stuff just asnswer the qustions please
Question 1
Starch is: (select all the correct answers)
| an energy storage carbohydrate in plants |
| an energy storage carbohydrate in animals |
| a structural carbohydrate in plants |
| a polymer of glucose |
Question 2
The monomers in starch are joined together by which type of linkage?
| beta 1-4 glycosidic linkage |
| alpha 1-4 glycosidic linkage |
| alpha 1-6 glycosidic linkage |
Question 3
Glycogen is: (select all that are correct)
| a polymer of glucose |
| a long chain molecule with very few if any branches |
| an energy storage carbohydrate in plants |
| a highly branched molecule with alpha 1-4 & alpha 1-6 glycosidic linkages |
| has many beta 1-4 glycosidic linkages |
| an energy storage carbohydrate in animals |
Question 4
What type of reaction will break down glycogen and produce glucose molecules?
| Dehydration |
| polymerization |
| depolymerization |
| Hydrolysis |
Question 5
Cellulose is: (select all that apply).
| an energy storage carbohydrate in plants |
| has both alpha 1-4 and beta 1-4 glycosidic linkages |
| a structural carbohydrate in plant cell walls |
| a polymer of glucose |
| a structural carbohydrate in animals |
Question 6
In cellulose, covalent bonds link glucose monomers and hydrogen bonds hold the long glucose chains together.
| True |
| False |
Question 7
Chitin is: (select all that apply)
| a polymer of glucose |
| can be used as sutures |
| a structural carbohydrate in plants |
| a structural polysaccaride found in the exoskeleton of animals like arthropods |
| an energy storage carbohydrate in animals |
Question 8
Lipids are not true polymers?
| True |
| False |
Question 9
Steroids are lipids
| True |
| False |
Question 10
A fat is composed of
| 4 fused carbon rings |
| a glycerol and 3 fatty acids |
| a phosphate a glycerol and 2 fatty acid chains |
| Name of Macronutrient | Subtypes of Macronutrient (We’ve listed the names to provide a framework, but explain what each means) | Food Sources (list food sources broken down by subtype of macronutrient) | Major Functions (make sure to explain each) | Recommended Intake (for you – include your demographic) | Related Health Concerns (be specific regarding how the macronutrient contributes to this health problem) |
| Carbohydrates | Monosaccharides Sweet, colorless, crystalline structure which contain one (mono) molecule of sugar (saccharide), with the basic CnH2nOn makeup: are the glucose and Fructose –Galactose; Sucrose, maltose and lactose Polysaccharides is a monosaccharaides bonded togehte (wikibooks). Which are simple? Monosaccharides Which are complex? Polysaccharides Both Monosacharides and Polysaccharides can be good healthy diet( wikkibooks). | Monosaccharides: glucose is found on some fruits, vegetable and honey; fructose is found in fruits, honey and corn syrup ( wikkibook) Polyasacchariders Starch (cereal grains such as wheat, oats, barley, corn rice and their products; cellulose which acts as a dietary fiber(soluble – barley-oats,rye) insoluble fiber whole grains ready to eat cereals and others) and glycogen – a storage form of glucose in the liver and muscle ( Non digestable dietary – cellulose – whole grains- green leatu vegetable; pectin- fruits, carrots, sweet potatoes. Exemple of digestable food – shellfish, animal liver.(nutrient.review,n.d) | |||
| Proteins | Essential amino acids Nonessential amino acids | ||||
| Lipids | Triglycerides Phospholipids Sterols |
Charts and tables are tools we use in science to break down information analytically and present data in an organized manner. It is a beneficial strategy for learning about and organizing scientific material, which we will be using often in this class. Make sure that you are detailed, thorough, and specific in your responses. Explain yourself clearly. Do not list a word or brief phrase without explaining what it means. For example, if you list diabetes for carbohydrates, make sure you explain how carbs are associated with diabetes. Don't leave the reader to make that connection for you. Also, make sure you provide APA-style references for each of your so
Life Chemistry LabReport
- Elements of Living Organisms
- Name the five most abundant elements found in the humanbody.
- Cells organize into tissues which work together to form
- What is the difference between an atom and an element?
- Molecules
- Is glucose an atom or molecule? What are the atoms inglucose?
- How many bonds can oxygen form?
- Is C6H12O6 a molecular orstructural formula? What is the name of this molecule?
- Based on lab, Section II, draw and label a ball and stickrepresentation of a carbon dioxide, water and ethyl alcoholmolecule. Use circles to designate atoms and lines for bonds, thenindicate the chemical symbol for each atom. Sign, date and preparean image of your drawing and include it with this lab report.
- Molecular Make Up of Living Organisms
- Name the four groups of organic molecules.
- _______ are the most abundant organic molecules in livingorganisms.
- Name a polysaccharide, monosaccharide, protein and alipid.
- Go to the lab, Section 3, Exercises 2, 3, 4 and 5 to completethe following table:
Type of Organic Molecule | Reagent | Sample Tested | Positive Color | Negative Color |
Carbohydrate (starch) | Iodine | |||
Sugar | Benedict’s solution | |||
Lipid (fat) | Sudan IV | |||
Protein | Biuret |
- Go to the lab, Section 3, Exercise 6 to locate starch in potatocells. Describe the microscopic appearance of starch in terms ofcolor and location within the cells.
- Measurement of pH
- What substance has an equal number of hydrogen ions(H+) and hydroxide ions (OH-)?
- What is the pH of the above substance?
- How does the addition of hydroxide ions (OH-) affectthe pH of your stomach?
- Go to lab, Section 4, Exercise 7 to test the pH of commonsolutions. Which solution tested had a pH closest to neutral? Whichsolution was most acidic?
Summary Questions
- What is the smallest subunit of carbohydrates?
- Which reagent could be used to test for diabetes?
- A member of your family has a high blood cholesterol count. Yousee “fat free” crackers in the grocery store and decide to test theproduct for the presence of lipids. How would this testproceed?
- A family member has been cautioned about eating foods high insugar. Explain how a test could be run for the presence ofsugar.
- Explain how to test for the presence of protein in milk.
- A friend complains of stomach acidity. Which substance testedmight safely help relieve your friend’s symptoms?
- Explain how solutions are classified as acids or bases. Then,give an example of a weak acid.
