1) growth at two replication forks arising from a single origin of replication produce a
“bubble” as daughter dna molecules form.
2) metamorphosis is a change in form and physiology that occurs during the
development of an insect.
3) the formation of the ozone shield during the precambrian era created favorable
conditions for the evolution of terrestrial life forms.
4) glycolysis occurs before the preparatory reaction and the citric acid cycle.
5) open circulatory systems are characterized by the presence of hemolymph as seen in
annelids.
6) when the number of births plus immigration exceeds the number of deaths plus
emigration, a population size will increase.
7) food mixes with gastric juices in the stomach to form a thick creamy mass called
chyme.
8) the following picture depicts which of the following changes in chromosome
structure.
a. deletion
b. duplication
c. translocation
d. aneuploidy
9) before watson and crick described dna structure, linus pauling proposed a possible
model with three strands of support running down the middle and the bases extending
out the sides. how did pauling’s model differ from watson and crick’s?
a. he missed the number of support strands which was two rather than three.
b. the support strands ran along the outside rather than down the center.
c. the bases were paired in the middle rather than sticking out the sides.
d. all of the choices describe how pauling’s model was different than watson and crick’s
model.
10) coniferous forests are found in all of the following locations except
a. coastal areas of the southeastern united states.
b. northern africa and the extreme southwestern united states.
c. the pacific coast of north america.
d. the northern part of north america and eurasia.
11) a microspore develops into a(n)
a. seed.
b. sporophyte.
c. male gametophyte.
d. female gametophyte.
e. ovule.
12) prior to prescription medications to control stomach acid and “heart burn” people
consumed baking soda (sodium bicarbonate) to decrease their discomfort. this would
indicate that sodium bicarbonate
a. effectively buffers stomach acid by releasing h+
b. should be sold as a prescription drug
c. blocks acid production by combining with oh-
d. neutralizes stomach acid by combining with excess h+
13) which of the following symptoms can help you recognize a person who is
undergoing anaphylactic shock?
a. immediate allergic response after a person is exposed to the allergen that can produce
the following symptoms: drop in blood pressure, increased dilation of the capillaries,
constriction of the bronchi and the inability to breathe.
b. a gradual allergic response after a person is exposed to the allergen that can produce
the following symptoms: drop in blood pressure, increased dilation of the capillaries,
constriction of the bronchi and the inability to breathe.
c. immediate allergic response after a person is exposed to the allergen that can produce
the following symptoms: an increase in blood pressure, increased dilation of the
capillaries, constriction of the bronchi and the inability to breathe.
d. immediate allergic response after a person is exposed to the allergen that can produce
the following symptoms: drop in blood pressure, decreased dilation of the capillaries,
constriction of the bronchi and the inability to breathe.
e. none of these are the symptoms of a person undergoing anaphylactic shock.
14) which statement is not true about bacteria?
a. bacteria contain membrane bound organelles.
b. some are photosynthetic.
c. some are motile due to flagella.
d. all bacteria are prokaryotes.
e. bacteria have a cell wall that contains peptidoglycan.
15) if plants were only able to undergo the cyclic pathway, which of the following
would not be true?
a. plants would not produce oxygen.
b. carbohydrate could still be produced but in much smaller quantities.
c. more nadph would be produced during the cyclic electron pathway.
d. atp production would decrease due to a smaller amount of h+ being available.
16) morphogenesis is characterized by
a. cell division and growth in size.
b. cells becoming specialized in structure and function.
c. body parts being shaped and patterned into a specific form.
d. all of the choices are correct.
e. none of the choices are correct.
incorrect
17) present experimental evidence related to griffith’s experiment and the identification
of the cell’s genetic material.
when experimenting with streptococcus pneumoniae in the 1920’s, griffith noticed that
some colonies were shiny and smooth and some were rough in appearance. he called
the shiny colonies, the s strain’ and the rough colonies, the r’ strain. when griffith
injected mice with the s strain, which he discovered were encapsulated, they died. when
he injected them with the r strain, they did not die. in trying to determine what factor
was responsible for the s strain’s virulence, griffith heat-killed the s bacteria to destroy
the capsule. when he injected mice with the normally fatal s strain bacteria that had
been heat-killed, they did not die. however, if the heat-killed s strain bacteria were
mixed with harmless live r strain bacteria of the same species and injected, the mice did
die. surprisingly, living s strain bacteria were recovered from the bodies of the mice.
griffith concluded that some substance from the dead s strain bacteria passed to the r
strain bacteria, imparting virulence and the ability to form a capsule. avery and others
continued the search for the substance that “transformed” the r strain into the s strain.
hypothesis i: genetic material or “transforming substance” is protein.
hypothesis ii: genetic material or “transforming substance” is rna.
hypothesis iii: genetic material or “transforming substance” is dna.
an experiment was performed that demonstrated that rnaase fails to prevent
transformation of the r strain to s strain. this finding
a. supports hypothesis i
b. supports hypothesis ii
c. supports hypothesis iii
d. rejects hypothesis i only.
e. rejects hypothesis ii only.
f. rejects hypothesis iii only.g. does not support or provide information to reject any of
these hypotheses.