UAB Biology 123 Exam 1 Study Guide
Questions With 100%Verified Answers
Correct ordering of biological organization? - correct answer...✔✔1. Biosphere
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2. Ecosystems
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3. Communities
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4. Populations
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5. Organisms
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6. Organs
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7. Tissues
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8. Cells
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9. Organelles
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10. Moleculesg
Polar - correct answer...✔✔
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distribution of electrons between the covalently bonded atoms is not even
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Three tenets of cell theory - correct answer...✔✔
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1) All living organisms composed of one or more cells
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2)Cell is the basic unit or structure and organization in organisms
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3)Cells come from pre-existing cells g g g g
covalent bond - correct answer...✔✔ g g g g
a chemical bond that involves the sharing of electron pairs between atoms
g g g g g g g g g g g
hydrogen bond - correct answer...✔✔ g g g g
weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent b
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ond in one molecule is attracted to the slightly negative atom of a polar covalent bond in an
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other molecule. g
ionic bond - correct answer...✔✔
g g g g
transfer of electrons, A chemical bond resulting from the attraction between oppositely cha
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rged ions. g
van der Waals forces - correct answer...✔✔
g g g g g g
the relatively weak attractive forces that are operative between neutral atoms and molecul
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es and that arise because of the electric polarization induced in each of the particles
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A covalent bond is likely to be polar when - correct answer...✔✔
g g g g g g g g g g g
one of the atoms sharing electrons is much more electronegative than the other atom
g g g g g g g g g g g g g
DNA nucleotide - correct answer...✔✔
g g g g
Deoxyribose Sugar, Bases GCAT, and Phosphate Group g g g g g g
, RNA nucleotide - correct answer...✔✔
g g g g
Ribose Sugar, Bases GCAU, and Phosphate Group
g g g g g g
Triglycerides - correct answer...✔✔an energy- g g g g
rich compound made up of a single molecule of glycerol and three molecules of fatty acid.
g g g g g g g g g g g g g g g
Phospholipids - correct answer...✔✔ g g g
a lipid consisting of a glycerol bound to two fatty acids and a phosphate group.
g g g g g g g g g g g g g g
Which element makes the greatest percentage of the human body mass? -
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gcorrect answer...✔✔Ca- 1.5% g g
Fe- <.05 g
I- <.05
g
O- 65% g
C- 18.5%g
31^P compared to 32^P, what is the difference? - correct answer...✔✔One more neuron
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The particle negative charge in a molecule of water occurs because - correct answer...✔✔
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a hydrogen bond
g g
Water molecules are able to form hydrogen bonds with - correct answer...✔✔
g g g g g g g g g g g
compounds that have polar covalent bonds. g g g g g
What is the pH of a solution with a hydroxyl ion [OH-] concentration of 1.0 x 10^-12 M? -
g g g g g g g g g g g g g g g g g g
gcorrect answer...✔✔[H+] x 1 x 10^-12 =1 x 10^-14
g g g g g g g g
[H+]= 1 x 10^-2 g g g
-log( 1 x 10^-2) g g g
=2 g
If the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8, this means -
g g g g g g g g g g g g g g g g g g g g
gcorrect answer...✔✔ g
the concentration of H+ ions is tenfold higher in the cytoplasm than in the mitochondrial ma
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trix.
12 and 13 on practice exam
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What functional group(s) shown above is (are) present in all amino acids?
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Which of the groups shown above is a functional group that helps stabilize proteins by form
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ing covalent cross-links within or between protein molecule - correct answer...✔✔C and D
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E
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