UAB BIOLOGY 123 EXAM 1 STUDY
GUIDE
Correct ordering of biological organization? - Correct Answers -1. Biosphere
2. Ecosystems
3. Communities
4. Populations
5. Organisms
6. Organs
7. Tissues
8. Cells
9. Organelles
10. Molecules
Polar - Correct Answers -distribution of electrons between the covalently bonded atoms
is not even
Three tenets of cell theory - Correct Answers -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 - Correct Answers -a chemical bond that involves the sharing of electron
pairs between atoms
hydrogen bond - Correct Answers -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 - Correct Answers -transfer of electrons, A chemical bond resulting from the
attraction between oppositely charged ions.
van der Waals forces - Correct Answers -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 - Correct Answers -one of the atoms sharing
electrons is much more electronegative than the other atom
, thylakoid membrane - Correct Answers -The photosynthetic membrane within a
chloroplast that contains light gathering pigment molecules and electron transport
chains.
Grana - Correct Answers -stacks of thylakoids
Stroma - Correct Answers -inside inner membrane but outside thylakoids
Microtubules - Correct Answers -tubulin protein
Microfilaments - Correct Answers -actin filaments
Long, thin fibers that function in the movement and support of the cell
DNA nucleotide - Correct Answers -Deoxyribose Sugar, Bases GCAT, and Phosphate
Group
RNA nucleotide - Correct Answers -Ribose Sugar, Bases GCAU, and Phosphate Group
Triglycerides - Correct Answers -an energy-rich compound made up of a single
molecule of glycerol and three molecules of fatty acid.
Phospholipids - Correct Answers -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? - Correct
Answers -Ca- 1.5%
Fe- <.05
I- <.05
O- 65%
C- 18.5%
31^P compared to 32^P, what is the difference? - Correct Answers -One more neuron
The particle negative charge in a molecule of water occurs because - Correct Answers -
a hydrogen bond
Water molecules are able to form hydrogen bonds with - Correct Answers -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? -
Correct Answers -[H+] x 1 x 10^-12 =1 x 10^-14
[H+]= 1 x 10^-2
-log( 1 x 10^-2)
=2
GUIDE
Correct ordering of biological organization? - Correct Answers -1. Biosphere
2. Ecosystems
3. Communities
4. Populations
5. Organisms
6. Organs
7. Tissues
8. Cells
9. Organelles
10. Molecules
Polar - Correct Answers -distribution of electrons between the covalently bonded atoms
is not even
Three tenets of cell theory - Correct Answers -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 - Correct Answers -a chemical bond that involves the sharing of electron
pairs between atoms
hydrogen bond - Correct Answers -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 - Correct Answers -transfer of electrons, A chemical bond resulting from the
attraction between oppositely charged ions.
van der Waals forces - Correct Answers -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 - Correct Answers -one of the atoms sharing
electrons is much more electronegative than the other atom
, thylakoid membrane - Correct Answers -The photosynthetic membrane within a
chloroplast that contains light gathering pigment molecules and electron transport
chains.
Grana - Correct Answers -stacks of thylakoids
Stroma - Correct Answers -inside inner membrane but outside thylakoids
Microtubules - Correct Answers -tubulin protein
Microfilaments - Correct Answers -actin filaments
Long, thin fibers that function in the movement and support of the cell
DNA nucleotide - Correct Answers -Deoxyribose Sugar, Bases GCAT, and Phosphate
Group
RNA nucleotide - Correct Answers -Ribose Sugar, Bases GCAU, and Phosphate Group
Triglycerides - Correct Answers -an energy-rich compound made up of a single
molecule of glycerol and three molecules of fatty acid.
Phospholipids - Correct Answers -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? - Correct
Answers -Ca- 1.5%
Fe- <.05
I- <.05
O- 65%
C- 18.5%
31^P compared to 32^P, what is the difference? - Correct Answers -One more neuron
The particle negative charge in a molecule of water occurs because - Correct Answers -
a hydrogen bond
Water molecules are able to form hydrogen bonds with - Correct Answers -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? -
Correct Answers -[H+] x 1 x 10^-12 =1 x 10^-14
[H+]= 1 x 10^-2
-log( 1 x 10^-2)
=2
