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Exam 1
er
50
Biology
Undergraduate 1
09/16/2013

Additional Biology Flashcards

 


 

Cards

Term
molecule, cell, organ system, population, ecosystem, biosphere
Definition
sequences represents the hierarchy of biological organization from least to most complex level?
Term
cell
Definition
The lowest level of biological organization that can perform all the activities required for life is the
Term
emergent properties
Definition
1 out of 1 points



Which of the following, reflected in the phrase "the whole is greater than the sum of its parts", is a consequence of the organization and interaction among component parts ?
Term
evolution by natural selection.
Definition
Through time, the lineage that led to modern whales shows a change from four-limbed land animals to aquatic animals with two limbs that function as flippers. This change is best explained by
Term
Anabolism
Definition
1 out of 1 points



Which of the following best describes the synthesis of a protein from amino acids?
Term
variation
Definition
Asexual reproduction is to uniformity as sexual reproduction is to ____________.
Term
Evolutionary change by natural selection
Definition
Variation resulting from sexual reproduction has the greatest implications for which of the following processes associated with life?
Term
Nucleic Acids
Definition
Which of the following types of macromolecules functions in information storage and retrieval in the cell?
Term
input; anabolism
Definition
Building large complex molecules from simpler building blocks requires energy ___________. This process is called _____________.
Term
population
Definition
Which of the following is a term for a localized group of organisms that belong to the same species?
Term
organ
Definition
A maple leaf is at which level in the hierarchy of biological organization?
Term
population
Definition
Which of the following is a term for a localized group of organisms that belong to the same species?
Term
amino acids
Definition
DNA is a macromolecule composed of building blocks called
Term
Metabolism is defined as:
Definition
the ability of an organism to respond to a stimulus
Term
proteins
Definition
Which of the following types of macromolecules has the greatest variety of functions in the cell?
Term
lipids and carbohydrates
Definition
Which of the following types of macromolecules functions in energy storage in the cell?
Term
irritability
Definition
Individuals of the single-celled organism Euglena maintain a particular distance from a light source to optimize photosynthetic efficiency. Caribou herds migrate on a seasonal basis to mate and find food. In some animals, glands produce sweat in response to elevated temperature. These are all examples of :
Term
nucleotide
Definition
DNA is a macromolecule composed of building blocks called
Term
carbon, hydrogen, nitrogen, oxygen
Definition
Which of the following are macorelements that make up approximately 96% of living matter?
Term
Iodine
Definition
Which of the following is a trace element that is required by humans and other vertebrate animals?
Term
atomic number
Definition
1 out of 1 points


Which of the following is unique to each element?
Term
protons and neutrons
Definition
1 out of 1 points


The mass number of an element can be easily approximated by adding together the number of _________ in an atom of that element.
Term
electrons in the outer (valence) shell in the atom.
Definition
The reactive properties or chemical behavior of an atom depend on the number of
Term
be stable and chemically nonreactive or inert.
Definition
Atoms of elements having eight electrons in the second energy level tend to
Term
ach hydrogen atom has a partial positive charge
Definition
Nitrogen (N) is much more electronegative than hydrogen (H). Which of the following statements is correct about the atoms in ammonia (NH3)?
Term
nonpolar covalent bonds.
Definition
If two atoms of equal electronegativity interact they are expected to form
Term
a polar covalent bond
Definition
What results from an unequal sharing of electrons between atoms.
Term
hydrogen bonding
Definition
What explains most specifically the attraction of water molecules to one another.
Term
B.
concentration of OH- has decreased 10 times what it was at pH 9.
concentration of H+ has increased 10 times what it was at pH 9.
Definition
If the pH of a solution is decreased from 9 to 8, it means that the
Term
B.
accepting H+ when they are in excess.
donating H+ to a solution when they have been depleted.
Definition
Buffers are substances that help resist shifts in pH by
Term
polar covalent bonds.
Definition
In a single molecule of water, the two hydrogen atoms are bonded to a single oxygen atom by
Term
a hydrogen bond
Definition
The slight negative charge at one end of one water molecule is attracted to the slight positive charge of another water molecule. What is this attraction called?
Term
the bonds that hold together the atoms in a water molecule are polar covalent bonds.
Definition
Water is able to form hydrogen bonds because
Term
absorption and release of heat when hydrogen bonds break and form.
Definition
Water's high specific heat is mainly a consequence of the
Term
nonpolar substances that repel water molecules.
Definition
Hydrophobic substances such as vegetable oil are
Term
HCl
Definition
Which of the following ionizes completely in solution and is considered to be a strong acid?
Term
NaOH
Definition
Which of the following ionizes completely in solution and is considered to be a strong base?
Term
.

gastric juice at pH 2
Definition
Which of the following solutions has the greatest concentration of hydrogen ions [H+]?
Term
seawater at pH 8
Definition
Which of the following solutions has the greatest concentration of hydroxide ions [OH-]?
Term
concentration of OH- is 100 times greater than what it was at pH 5.
Definition
If the pH of a solution is increased from pH 5 to pH 7, it means that the
Term
They maintain a relatively constant pH.
Definition
Which of the following statements is true about buffer solutions?
Term
hydrogen ions is equal to the concentration of hydroxide ions.
Definition
In a neutral solution the concentration of
Term
Nucleus
Definition
Contains most of the DNA of the cell; • Controls/integrates the function of other organelles
Term
Ribosomes
Definition
Protein synthesis
Term
the removal of water (dehydration synthesis).
Definition
Polymers of polysaccharides, nucleic acids, and proteins are all synthesized from monomers by which process?
Term
Dehydration reactions assemble polymers, and hydrolysis breaks down polymers.
Definition
Which of the following best summarizes the relationship between dehydration synthesis and hydrolysis?
Term
as a disaccharide
Definition
Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is lactose classified?
Term
They are both polymers of glucose.
Definition
Which of the following is true of both starch and cellulose?
Term
have a higher ratio of hydrogen to carbon than do unsaturated fatty acids.
Definition
Saturated fatty acids
Term
separate the major organelles so their particular functions can be studied.
Definition
A primary objective of cell fractionation is to
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