BIO 121 Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
True or False: nothing in science is proven - CORRECT ANSWER - True
Theory - CORRECT ANSWER - well substained explanation of something in the natural
world that can incorporate facts, laws, hypothesises etc
Gravitational Theory - CORRECT ANSWER - gravity is factual, there is a vast body of
knowledge that explains the facts of gravity
facts, inferences, laws, tested hypothesis
Evolutionary theory - CORRECT ANSWER - facts. evolution itself is factual. inferences,
laws
evolution accounts for the unity and diversity of life
emergent properties - CORRECT ANSWER - new properties emerge at each level in
biological hierarchy
result from arrangement of parts in an ecosystem/community
number of protons determines: - CORRECT ANSWER - what chemical element it is
isotopes - CORRECT ANSWER - same element, different number of neutrons
valence shells - CORRECT ANSWER - determine chemical properties
lose, gain, or share to fill valence shell
how many electrons are needed to fill a valence shell? - CORRECT ANSWER -8
except H and He (2)
, silicon dioxide - CORRECT ANSWER - sand, glass
atoms are joined by chemical bonds to form: - CORRECT ANSWER - compounds
chemical formula - CORRECT ANSWER - gives type and relative number of atoms in
sequence
covalent bonds - CORRECT ANSWER - outer shells of atoms have joined. strong and
stable. atoms share valence electrons
Nonpolar - CORRECT ANSWER - if electrons are shared equally
polar - CORRECT ANSWER - if electrons are not shared equally (H2O)
if one element is more electronegative than the other
ionic bonds - CORRECT ANSWER - form between positive (cations) and negative
(anions)
strong w/o presence of water but weak in aqueous solution (because water has + and - charges)
hydrogen bonds - CORRECT ANSWER - relatively weak. form when hyd. atom w/ partial
positive is attracted to atom w/ partial negative
4 main classes of biological molecules - CORRECT ANSWER - proteins
nucleic acids
carbohydrates
lipids
Monomer of proteins - CORRECT ANSWER - amino acids
Exam Questions and CORRECT Answers
True or False: nothing in science is proven - CORRECT ANSWER - True
Theory - CORRECT ANSWER - well substained explanation of something in the natural
world that can incorporate facts, laws, hypothesises etc
Gravitational Theory - CORRECT ANSWER - gravity is factual, there is a vast body of
knowledge that explains the facts of gravity
facts, inferences, laws, tested hypothesis
Evolutionary theory - CORRECT ANSWER - facts. evolution itself is factual. inferences,
laws
evolution accounts for the unity and diversity of life
emergent properties - CORRECT ANSWER - new properties emerge at each level in
biological hierarchy
result from arrangement of parts in an ecosystem/community
number of protons determines: - CORRECT ANSWER - what chemical element it is
isotopes - CORRECT ANSWER - same element, different number of neutrons
valence shells - CORRECT ANSWER - determine chemical properties
lose, gain, or share to fill valence shell
how many electrons are needed to fill a valence shell? - CORRECT ANSWER -8
except H and He (2)
, silicon dioxide - CORRECT ANSWER - sand, glass
atoms are joined by chemical bonds to form: - CORRECT ANSWER - compounds
chemical formula - CORRECT ANSWER - gives type and relative number of atoms in
sequence
covalent bonds - CORRECT ANSWER - outer shells of atoms have joined. strong and
stable. atoms share valence electrons
Nonpolar - CORRECT ANSWER - if electrons are shared equally
polar - CORRECT ANSWER - if electrons are not shared equally (H2O)
if one element is more electronegative than the other
ionic bonds - CORRECT ANSWER - form between positive (cations) and negative
(anions)
strong w/o presence of water but weak in aqueous solution (because water has + and - charges)
hydrogen bonds - CORRECT ANSWER - relatively weak. form when hyd. atom w/ partial
positive is attracted to atom w/ partial negative
4 main classes of biological molecules - CORRECT ANSWER - proteins
nucleic acids
carbohydrates
lipids
Monomer of proteins - CORRECT ANSWER - amino acids
