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UMD BSCI 330 exam 1 Questions With Answers Graded A+ Assured Success
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in condensation reactions, removing H2O ____. While adding H2O ____ - ️️in condensation reactions, removing H2O forms molecules. While adding H2O breaks down molecules. describe chemical feature(s) of amino acids - ️️uniform chemical structure w/ directionality - amino terminus -carbo...

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  • October 17, 2024
  • 11
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • umd bsci 330

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  • UMD BSCI 330
  • UMD BSCI 330

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UMD BSCI 330 exam 1
in condensation reactions, removing H2O ____. While adding H2O ____ - ✔️✔️in
condensation reactions, removing H2O forms molecules. While adding H2O breaks
down molecules.


describe chemical feature(s) of amino acids - ✔️✔️uniform chemical structure w/
directionality
- amino terminus
-carboyl terminus
-R group


what is the difference between seeing and visualizing? - ✔️✔️seeing- can detect
visualizing- seeing shapes, structures, measuring

Given the following building blocks ==> structures

sugar
fatty acid
amino acid
nucleotides - ✔️✔️sugar ==> polysaccharides
fatty acid ==> fat, lipids, membranes
amino acid ==> protein
nucleotides ==> nucleic acid

condensation reactions link ___ to form ___ - ✔️✔️condensation reactions link
monomers to form polymers


what structure is the plant cell wall made of? - ✔️✔️carbohydrates

describe the chemical nature of carbohydrates - ✔️✔️- highly polar
-hydrophilic
-H bond forming

describe the chemical feature(s) of carbohydrates - ✔️✔️- linear chain
OR
-ring (polymer)
-several OH groups (potential for linkage)

why can we digest starch & not cellulose - ✔️✔️starch has alpha link b/t glycosidic
bonds. cellulose has beta link and we dont have a beta enzyme.

, when naming linkages, position 1 OH group determines... - ✔️✔️Beta - Up
Alpha - Down

the ___ nature of lipids can be membranes/barriers between 2 aqueous compartments -
✔️✔️hydrophobic

describe the chemical feature(s) of lipids - ✔️✔️hydroen chains w/ polar COOH at the
ends

describe the chemical nature of lipids - ✔️✔️amphipathic (one end likes water)

Describe a phospolipid - ✔️✔️- x2 fatty acid tails (nonpolar/hydrophobic)

-head group (polar/hydrophillic)(charged Phosphate)

Describe Tay-Sachs disease - ✔️✔️neuron cells mutated and improperly metabolize
gangleoside (Gm2) as it accumulates

describe chemical narure of amino acids - ✔️✔️R group varies

what is pK ? - ✔️✔️pH at which 1/2 the molecules of an ionizable substance are
charged

Which amino acid side chain is closest to physiological pH? - ✔️✔️Histadine


Name the polar amino acid side chains - ✔️✔️- serine
- threonine
- cysteine
- tyrosine
- asparagine
- glutamine

Name the electrically charged amino acid side chains - ✔️✔️Acidic
asparate & glutamate

Basic
lysine, arginine, histadine

Describe chemical features of nucleotides - ✔️✔️uniform structure w/ side group
variability (N base)

Describe the chemical nature of nucleotides - ✔️✔️polar, charged

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