BIO 1201 EXAM 1 CONTENT REVIEW
(CHAPTERS 1-5) WITH COMPLETE
SOLUTIONS
By, mass most of the human body is composed of - ANSWER-oxygen
True or false. The most recent phylogenetic data suggests that bacteria and archaea
may be more closely related than archaea and eukarya. - ANSWER-false. protists are
still being debated not bacteria/archaea
How many electrons does carbon have in its valence shell? - ANSWER-4
In a normal sample of double stranded DNA all of the following are true about the
nitrogenous base pairs - ANSWER-# of purines = # of pyrimidines
# of C's = # of G's
# of A's = # of T's
True or False. An alpha helix is held together by hydrogen bonds between the hydrogen
atoms of the amine groups and oxygen atoms in the R groups of the amino acids
forming the alpha helix. - ANSWER-False
___________________________________results from interactions between
polypeptide chains. - ANSWER-quaternary structure
Characteristics of all life: - ANSWER-order, evolution, regulation, reproduction, energy
processing, growth/development, response to the environment
Each level of biological organization has ______________ - ANSWER-emergent
properties
emergent property - ANSWER-new properties that arise with each step upward in the
hierarchy of life, owing to the arrangement and interactions of parts as complexity
increases
energy - ANSWER-capacity to do work
Prokaryotes do not have a - ANSWER-nucleus or membrane bound organelles
inheritance - ANSWER-Acquisition of traits by transmission of DNA from parent to
offspring.
Ionic bond - ANSWER-bond between two oppositely charged ions
, Covalent bond - ANSWER-is a bond formed when two atoms share a pair of valence
electrons
nonpolar covalent bond - ANSWER-shares equally because both atoms have equal or
close to equal electronegativity
polar covalent bond - ANSWER-shares unequally because the atoms have different
electronegativity
Hydrogen bond - ANSWER-attraction between partial positively charged atoms/regions
of a molecule and partial negatively charged atoms/regions of a molecule. These are
weak, temporary bonds, but important to living things. Ex) DNA strands require
hydrogen bonds to connect the strands of the double helix.
chemical equilibrium - ANSWER-when the reaction rates (forward and reverse) are
equal
Negative feedback - ANSWER-a loop in which the response reduces the initial stimulus;
insulin secretion works with this kind of feedback
positive feedback - ANSWER-an end product speeds up its own production
Radioisotopes - ANSWER-isotopes (meaning they gained neutrons) which are unstable
and undergo spontaneous decay/breakdown giving off energy in the process
chemical bond - ANSWER-is an interaction b/w two atoms which results in the atoms
staying close to each other
combound - ANSWER-are bonds b/w differing elements with differing charges
molecules - ANSWER-two or more of the same type of atoms held together by covalent
bonds
Electronegativity - ANSWER-the attraction of an atom to gain electrons to fill its
outermost/valence shell
homeostasis - ANSWER-tendency of life to try and maintain their structure and regulate
their internal environment.
What are the two prokaryotic domains? - ANSWER-bacteria and archaea
theory - ANSWER-is an explanation of natural events that is based on a LARGE
number of observations and/or experiments.
(CHAPTERS 1-5) WITH COMPLETE
SOLUTIONS
By, mass most of the human body is composed of - ANSWER-oxygen
True or false. The most recent phylogenetic data suggests that bacteria and archaea
may be more closely related than archaea and eukarya. - ANSWER-false. protists are
still being debated not bacteria/archaea
How many electrons does carbon have in its valence shell? - ANSWER-4
In a normal sample of double stranded DNA all of the following are true about the
nitrogenous base pairs - ANSWER-# of purines = # of pyrimidines
# of C's = # of G's
# of A's = # of T's
True or False. An alpha helix is held together by hydrogen bonds between the hydrogen
atoms of the amine groups and oxygen atoms in the R groups of the amino acids
forming the alpha helix. - ANSWER-False
___________________________________results from interactions between
polypeptide chains. - ANSWER-quaternary structure
Characteristics of all life: - ANSWER-order, evolution, regulation, reproduction, energy
processing, growth/development, response to the environment
Each level of biological organization has ______________ - ANSWER-emergent
properties
emergent property - ANSWER-new properties that arise with each step upward in the
hierarchy of life, owing to the arrangement and interactions of parts as complexity
increases
energy - ANSWER-capacity to do work
Prokaryotes do not have a - ANSWER-nucleus or membrane bound organelles
inheritance - ANSWER-Acquisition of traits by transmission of DNA from parent to
offspring.
Ionic bond - ANSWER-bond between two oppositely charged ions
, Covalent bond - ANSWER-is a bond formed when two atoms share a pair of valence
electrons
nonpolar covalent bond - ANSWER-shares equally because both atoms have equal or
close to equal electronegativity
polar covalent bond - ANSWER-shares unequally because the atoms have different
electronegativity
Hydrogen bond - ANSWER-attraction between partial positively charged atoms/regions
of a molecule and partial negatively charged atoms/regions of a molecule. These are
weak, temporary bonds, but important to living things. Ex) DNA strands require
hydrogen bonds to connect the strands of the double helix.
chemical equilibrium - ANSWER-when the reaction rates (forward and reverse) are
equal
Negative feedback - ANSWER-a loop in which the response reduces the initial stimulus;
insulin secretion works with this kind of feedback
positive feedback - ANSWER-an end product speeds up its own production
Radioisotopes - ANSWER-isotopes (meaning they gained neutrons) which are unstable
and undergo spontaneous decay/breakdown giving off energy in the process
chemical bond - ANSWER-is an interaction b/w two atoms which results in the atoms
staying close to each other
combound - ANSWER-are bonds b/w differing elements with differing charges
molecules - ANSWER-two or more of the same type of atoms held together by covalent
bonds
Electronegativity - ANSWER-the attraction of an atom to gain electrons to fill its
outermost/valence shell
homeostasis - ANSWER-tendency of life to try and maintain their structure and regulate
their internal environment.
What are the two prokaryotic domains? - ANSWER-bacteria and archaea
theory - ANSWER-is an explanation of natural events that is based on a LARGE
number of observations and/or experiments.
