Explanation:

Unlike carbohydrates and also proteins, lipids are mainly nonpolar molecules. Together a result, they room unable come be liquified in aqueous solutions, such as blood. This renders them need a lipoprotein in bespeak to it is in transported through the bloodstream. Without this proteins, lipids would certainly be insoluble in the blood and cause clots.

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Explanation:

Amphipathic molecules have actually both polar and nonpolar sections. Because that phospholipids, the phosphate region carries a an unfavorable charge, making it polar, while the lipid tail is a nonpolar hydrocarbon. Gift amphipathic is a vital characteristic that allows phospholipids to kind the plasma membrane. The polar ends space able to face the aqueous environment while the nonpolar ends are confronted towards every other. This create an efficient nonpolar barrier around the cell, while still remaining stable by having polar regions facing the aqueous environments.


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Example question #3 : Macromolecules


Which carbohydrate can not be digested by humans?


Possible Answers:

Starch


Amylose


Cellulose


Glycogen


Correct answer:

Cellulose


Explanation:

Cellulose is a polysaccharide in which the monomers are linked by a beta linkage. This affiliation requires a devoted enzyme that is not found in human being beings. Together a result, people cannot failure cellulose.

Glycogen is provided to store glucose in the body, and also can be broken down to release energy. Starch is used to save glucose in plants, but can additionally be broken down by humans. Amylose is a component of starch.


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Example concern #4 : Macromolecules


Which that the adhering to classes of molecules produces the most energy per gram?


Possible Answers:

Nucleic acids


Fibers


Proteins


Fats


Carbohydrates


Correct answer:

Fats


Explanation:

There are four classes of organic molecules: fats, carbohydrates, proteins, and also nucleic acids. The these, fats produce the most energy per gram at a whopping ripe calories per gram. Carbohydrates and also proteins create less than fifty percent of this, in ~ only four calories every gram.


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Example inquiry #5 : Macromolecules


Which of the following is no a form of fat in the body?


Possible Answers:

Di-saturated fats


Unsaturated fats


Saturated fats


Trans fats


Mono-unsaturated fats


Correct answer:

Di-saturated fats


Explanation:

Lipids, or fats, are developed from hydrocarbon chains. The carbon atoms attach together and bond to hydrogen to to fill their orbitals. Once all the binding in the molecule are single bonds, the lipid is saturated. There is no such thing as a "di-saturated fat."

When there is a single double bond in the chain, the lipid is mono-unsaturated. Once there room multiple double bonds in the chain, the lipid is unsaturated. Infectious diseases world fashion fats have a double bond with the adjacent hydrogen atoms on opposite political parties of the carbon chain, maintaining a linear structure.

Most fat in the body space triglycerides. Their primary duty is long-term power storage.


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Example question #6 : Macromolecules


Which of the complying with is a carbohydrate?


Possible Answers:

Triglyceride


Helicase


Insulin


Cholesterol


Ribose


Correct answer:

Ribose


Explanation:

Carbohydrates are well-known as street or saccharides. Practically all carbohydrates end in the suffix "-ose," make them simple to identify. Ribose is a five-carbon sugar uncovered in RNA. Some other common carbohydrates encompass deoxyribose, glucose, cellulose, and also lactose. Sucrose is the technical name the table sugar, i beg your pardon is also a carbohydrate.

The various other classes of molecules room fats, proteins, and nucleic acids. Fats, or lipids, deserve to be further broken down right into other categories, such as sterols and also glycerolipids. Sterol lipids generally have the suffix "-ol" and include cholesterol and also estradiol (estrogen). Glycerolipids incorporate triglycerides. Proteins are created from amino acids. Enzymes space a class of protein and also generally have the suffix "-ase," such as helicase. Other proteins frequently have the suffix "-in" or "-en," such together insulin.


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Example inquiry #7 : Macromolecules


Which of the complying with are true about lipids?


Possible Answers:

Lipids deserve to only be triglycerides


Lipids do not store energy


Lipids space soluble in water


Lipids are hydrophilic


Lipids room soluble in nonpolar solvents


Correct answer:

Lipids are soluble in nonpolar solvents


Explanation:

Lipids space hydrophobic, which method that they space insoluble in water, a polar solvent. Lipids deserve to store numerous energy. Lipids contain large nonpolar regions, which method that they are soluble in nonpolar solvents. Triglycerides are just one type of lipids. Other types include, however are not restricted to: monoglycerides, diglycerides, phospholipids, and also fatty acids.


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Example question #8 : Macromolecules


What is the difference in between saturated and also unsaturated fat acids?

I. Saturated fat acids execute not contain double bonds, unsaturated fat acids contain at the very least one twin bond

II. Saturated fatty acids save at least one double bond, unsaturated fat acids carry out not contain dual bonds

III. Saturated fatty acids save the maximum lot of H atom on their carbon skeletons

IV. Unsaturated fat acids contain the maximum quantity of H atom on your carbon skeletons


Possible Answers:

I only


I and also III


III only


II only


II and also IV


Correct answer:

I and also III


Explanation:

Saturated fatty acids do not have dual bonds in between carbon atoms. Therefore, the maximum lot of hydrogen atoms are bonded to the carbon skeleton chain. Saturated fat acids are solid in ~ room temperature, prefer butter. Unsaturated fatty acids have at lease one twin bond. These double bonds create kinks in the carbon skeleton, preventing hydrogen atom from pack onto the skeleton. Unsaturated fatty acids room therefore much more fluid and are liquid at room temperature, choose oil and also natural peanut butter. 


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Example concern #9 : Macromolecules


What is true that both lipids and fats?

I. Both are macromolecules

II. Both space hydrophobic

III. Fats space composed of glycerol and fatty acids

IV. Lipids room composed that glycerol and also fatty acids

V. Fats are hosted together via ester linkage


Possible Answers:

I, II, and V


I, II, IV, and also V


I, III, and also IV


II, III, and V


I and also II


Correct answer:

II, III, and V


Explanation:

Because lipids execute not include true polymers, they space not big enough to be taken into consideration macromolecules. However, prefer fats, lipids room hydrophobic. Fats are considered macromolecules and are written of glycerol and also fatty acid molecules. The glycerol and also fatty acid molecules space joined via an ester linkage, i m sorry is developed by a dehydration reaction.


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Example question #1 : Macromolecules


What street molecule go ATP contain?


Possible Answers:

Adenosine


Adenine


Deoxyribose


Ribose


Triphosphate


Correct answer:

Ribose


Explanation:

ATP stands for adenosine triphosphate. Ribose is the five-carbon sugar, i m sorry is external inspection to a phosphate group and adenine group in a molecule that ATP. 


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