BIOS 1404 PRACTICAL Exam

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BIOS 1404 PRACTICAL Exam

• water in a mammalian cell

–Answer 70%

• proteins in a mammalian cell

–Answer 18%

• lipids in a mammalian cell

–Answer 5%

• carbohydrates in a mammalian cell

–Answer 2%

• nucleic acids in a mammalian cell

–Answer 1%

• dehydration synthesis

–Answer what links the subunits in macromolecules (molecule of water is removed and the two subunits are bonded covalently)

• hydrolysis

–Answer the addition of a water molecule to the subunits of a macromolecule in order to break the bond

• an amino group (-NH2), a carboxyl (acid)

group (-COOH), a variable side chain (-R) and a H attached to a central carbon –Answer proteins are made up of 1 / 2

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• emulsifier

–Answer causes a fat molecule to disperse in water (polar and non polar ends)

• emulsifiers produced by the liver

–Answer bile salts

• positive control

–Answer the variable for which you are testing; it reacts positively and demonstrates the test's ability to detect what you expect.

• negative control

–Answer does not contain the variable for which you are searching. It contains only the solvent (often distilled water with no solute) and does not react in the test. A negative control shows you what a negative result looks like.

• Benedict's test

–Answer identifies reducing sugars based on their ability to reduce the cupric (Cu2+) ions to cuprous (Cu+) oxide at basic (high) pH.

• Benedict's Test green solution

–Answer indicates a small amount of reducing sugars

• Benedict's Test reddish orange solution

–Answer indicates an abundance of reducing sugars

• Non-reducing sugars such as sucrose

–Answer produce no change in color

• Iodine Test

–Answer distinguishes starch from monosaccharides, disaccharides, and other polysaccharides

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