Question

QUESTION 1 some digestion (hydrolysis) in the stomach. Like proteins, lipids undergo True False

Answer 1

3. Proteins are digested by pepsin in the stomach and by trypsin and chymotrypsin in the small intestine. Lipids are digested in the small intestine by lipase after being emulsified by bile from the liver, and in stomach by the action of lingual lipase which accumulates from the mouth and break the triacylglycerols into diacylgycerols and fatty acids.

So the statement is true.

4. Glycerophospholipid is made up of glycerol backbone with two fatty acid chains attached to it, and a phosphate group at the third carbon.

Spingolipid has an amino alcohol called sphingosine molecule as the back bone to which fatty acid is attached.

Both these lipids can be represented having a polar or hydrophilic part due to phosphate (glycerophospholipid) or amino (sphingolipid) groups and the non polar or the hydrophobic part due to the fatty acids that are attached. Hence, the cartoon can be used to depict both the lipids.

So, the statement is true.

5. The neural signal responsible for beginning the hormonal cascade first acts on the hypothalamus which functions to either inhibit or stimulate the pitutary gland to the release the hormone that acts upon the target cell.

So the statement is false.

6. Compound A is a carbohydrateade up of 6 carbons while the compound B is fatty acid chain of 12 carbons. The carbon chain in both the compounds will undergo oxidation to produce ATPs. The carbons in the fatty acids are in more reduced condition and more in number than the carbons in the carbohydrate and will produce more energy upon oxidation. Hence, the catabolic process of their breakdown which occurs through their oxidation (in case of carbohydrate, cellular respiration, and in case of fatty acids, beta-oxidation), yields more ATPs for the fatty acid than the carbohydrates.

So the statement is false.