BIO 121 Exam 1 Questions With All 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
what do proteins do Correct answer-enzymes- catalyze chemical reactions
structural/transport proteins help w/ cells
monomer of nucleic acids Correct answer-nucleotides
what do nucleic acids do Correct answer-code for genetic info
monomer of carbohydrates Correct answer-monosaccharides
what do carbs do Correct answer-storage for glucose
monomer of lipids Correct answer-fatty acids and glycerol
what do lipids do Correct answer-form cell membranes
carbon atoms Correct answer-form up to four covalent bonds
single, double, or triple bonds
straight, branched, or rings
bond with many different elements
structural isomers Correct answer-different covalent arrangements
ethanol C2H60
geometric isomers Correct answer-different spatial arrangements
enatiomers Correct answer-mirror images
Polymers Correct answer-long chains of monomers
often linked via condensation reactions
Macromolecules Correct answer-large polymers
(polysaccharides, protein, DNA)
often broken down by hydrolysis
water exhibits _________ because it forms hydrogen bonds with itself Correct answer-cohesion
water molecules exhibit __________ by hydrogen bonding to substances with ionic or polar regions
Correct answer-adhesion
water has a high s____________ h________ Correct answer-specific heat
hydrogen bonds must break to raise water temperature
specific heat of water helps: Correct answer-organisms maintain constant internal temperature
stabilize the temperature of large bodies of water (oceans). this greatly affects climate
water has a high heat of _____________ Correct answer-vaporization.
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
what do proteins do Correct answer-enzymes- catalyze chemical reactions
structural/transport proteins help w/ cells
monomer of nucleic acids Correct answer-nucleotides
what do nucleic acids do Correct answer-code for genetic info
monomer of carbohydrates Correct answer-monosaccharides
what do carbs do Correct answer-storage for glucose
monomer of lipids Correct answer-fatty acids and glycerol
what do lipids do Correct answer-form cell membranes
carbon atoms Correct answer-form up to four covalent bonds
single, double, or triple bonds
straight, branched, or rings
bond with many different elements
structural isomers Correct answer-different covalent arrangements
ethanol C2H60
geometric isomers Correct answer-different spatial arrangements
enatiomers Correct answer-mirror images
Polymers Correct answer-long chains of monomers
often linked via condensation reactions
Macromolecules Correct answer-large polymers
(polysaccharides, protein, DNA)
often broken down by hydrolysis
water exhibits _________ because it forms hydrogen bonds with itself Correct answer-cohesion
water molecules exhibit __________ by hydrogen bonding to substances with ionic or polar regions
Correct answer-adhesion
water has a high s____________ h________ Correct answer-specific heat
hydrogen bonds must break to raise water temperature
specific heat of water helps: Correct answer-organisms maintain constant internal temperature
stabilize the temperature of large bodies of water (oceans). this greatly affects climate
water has a high heat of _____________ Correct answer-vaporization.
