Bio 100 EXAM 1
which of the following is a carboxyl group?
-COOH
which of the following is an amino group?
-NH2
what is the complementary sequence to the DNA strand TCGATGG?
AGCTACC
the tree in your backyard is home to two cardinals, a colony of ants, a wasp's nests, two squirrels, and millions of bacteria. together, all of these organisms represent
a community
you will notice over the past month, many students on campus have started wearing anew style of school sweatshirt. you think to yourself that perhaps the bookstore has recently started selling this new style of sweatshirt. this is an example of
a hypothesis
a hypothesis is
a proposed explanation for a set of observations
the teeth of grain eating animals are usually broad and ridged. this makes the teeth suitable for grinding and chewing. meat eating animals have pointed teeth that are good for puncturing and ripping flesh. this illustrates
a result of natural selection as well as the connection between form and function
which of the following statements about the domain bacteria is true?
all bacteria lack nucleus
organic compounds
always contain carbon
glucose molecules are to starch as ___ are to proteins
amino acids
how are these two amino acids attached together?
amino group to carboxylic acid group
which of the following would be correctly classified as a protein
an enzyme
what is the difference between a tissue and a organ system?
an organ system includes tissues
a theory ia
and explanation of an idea that is broad in scope and supported by a large body of evidence
organisms belonging to the kingdom plantae
are photosyntheitc
organisms that are prokaryotes are in the domains
bacteria and archaea
which of the following statements about ecosystems is false?
bacteria and fungi recycle energy within an ecosystem
which of the following statements is not an example of evolution that has resulted from human activity?
because of hunting, organisms such as bears are fewer in numbers
members of the kingdom animalia
can obtain their food by eating other organisms
which of the following statements regarding carbon is false?
carbon has the ability to bond up to six other atoms
which of the following lists contains only polysaccharides?
cellulose, starch, and glycogen
DNA differs from RNA because DNA
contains thymine in place of uracil
consider thee following statement "if all the vertebrates have backbones, and turtles are vertebrates, then the turtles have backbones.' this statement is an example of
deductive reasoning
which of the following statements about genetics is true?
differences among organisms reflect their different nucleotide sequences in their DNA
which of the following statements about evolution is true?
evolution can result in adaptations
what feature of fats makes them hydrophobic?
fats have nonpolar hydrocarbon chains
sucrose is formed
from two monosaccharides through dehydration synthesis
which of the following is a kingdom within the domain Eukarya?
fungi
which of the following organisms contain the polysaccharide chitin?
fungi and insects
the storage form of carbohydrates is ____ in animals and ____ in plants.
glycogen; starch
your instructor asks you to look into your microscope to see a prokaryotic cell. you will be looking for a cell that
has a membrane
the results of dehydration synthesis can be reversed by
hydrolysis
which of the following statements is not consistent with darwin's theory of natural selection?
individual organisms experience genetic changes during their life spans to better fit their environment
basic science discoveries often lead to the development of technology, and the development of technology often leads to new scientific discoveries. which of the following is not accurate pairing pf technology and a discovery?
invention of the microscope and creation of evolutionary trees
if you were to add olive oil to your food as part of a diet to lower your risk of atherosclerotic disease, you would use olive oil that
is liquid at room temperature
which level in the hierarchy shown is a community?
level C
peptide bonds
link amino acids
life is organized in a hierarchical fashion. which of the following sequences correctly lists that hierarchy from least inclusive to most inclusive?
molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem
which of the following statements regarding a common cellular activity is false?
new cells are derived from cellular components like organelles
a phospholipid is composed of
one glycerol molecule linked to one phosphate group and two fatty acids
what combination of these fatty acids could you use to make a fat that is liquid at room temperature?
one palmitic acid, one stearic acid, and ibe oleic acid
if you eat a hamburger, you are mainly eating ground up beef muscle. what levels of organization are represented in this ground up muscle?
organelle, cell, tissue
which of the following statements about the properties is false?
organisms have an unchanging constant internal environment
a major type of lipid found in cell membranes is
phospholipids
the role of a control in a experiment group is to
provide a basis of comparison to he experimental group
a protein containing more than one polypeptide chain exhibits the ___ level of protein structure
quanternary
to be scientifically valid, a hypothesis must be
testable and falsifiable
kingdom fungi includes species
that obtain food by decomposing dead organisms and absorbing nutrients
the primary structure of a protein is
the amino acid sequence of the polypeptide chain
amino acids can be distinguished from one another by
the chemical properties of their R groups
how are genes used by cells to build proteins?
the genes in DNA direct the synthesis of an RNA molecule, which is used to build a protein
these two molecules are structural isomers. what is the difference between them?
the location of a double bonded oxygen atom
propanol and isopropanol are isomers. this means that they have
the same molecular formula but different chemical properties
proteins differ from one another because
the sequence of amino acids in the polypeptide chain differs from protein to protein
an antibiotic kills 99.9% of a bacterial population. you would expect the next generation of bacteria
to be more resistant to that antibiotic
what is the general function of enzymes within a cell?
to speed up chemical reactions
a disaccharide forms when
two monosacchardes join by dehydration synthesis
a scientist performs a controlled experiments. this means that
two versions of the experiment are conducted, one differing from the other by only a single variable
in an ecosystem, energy
typically flows from producers through a series of consumers
fatty acids with double bonds between some of their carbons are said to be
unsaturated
