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