BIO 148 FINAL REVIEW EXAM 1005
SOLVED RATED A+
Which of the following DOES NOT correctly fill in the blank? All cells contain ________.
a. DNA
b. RNA
c. Ribosomes
d. Nucleus
e. All of the above correctly fill in the blank. - ANSWERSD
Salmon swim up-river, reproduce, and then die. Which of the following salmon has the
highest fitness?
a. A salmon that lays 100 eggs of which 90 get eaten by ducks
b. A salmon that lays 125 eggs of which 75 hatch and 25 develop into fertile adults
c. A salmon that lays 125 eggs of which 100 hatch and 20 develop into fertile adults
d. A salmon that has the genes to produce 130 eggs, but gets eaten by a bear before
reproducing - ANSWERSB
According to the endosymbiosis theory, which of the following eukaryotic cell structures
evolved from bacterium that was engulfed by the common ancestor of all eukaryotes?
a. the plasma membrane
b. the endoplasmic reticulum (ER)
c. the nucleus
d. mitochondria
e. All of the above. - ANSWERSD
You have devised a system that allows you to stain thymine bases with a visible green
dye. You place some yeast cells into a growth media containing the dye solution and
allow the dye to become incorporated into both strands of the DNA. You then remove a
single yeast cell from the dye during G1 phase and allow it to go through two rounds of
cell division in a growth medium that contains no dye, but has all other necessary
components needed for replication. After one round of replication, what percentage of
the DNA molecules will contain an entire single strand that contains no green dye?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100% - ANSWERS
Only 1% of the bacteria in a population are resistant to the antibiotic rifampicin. Which of
the following environments would cause the % of rifampicin resistant bacteria to
increase over time?
, a. An environment without rifampicin or any other antibiotics. b. An environment without
rifampicin but containing other antibiotics.
c. An environment with rifampicin but not any other antibiotics.
d. Both B and C
e. none of the above - ANSWERSC
A population of stickleback fish is adapted to an environment where large fish such as
trout are their major predator. Which of the following would be a mutation that
decreases fitness?
a. A mutation that prevents switch activators from binding to a.
b. A mutation that prevents switch activators from binding to b.
c. A mutation that prevents switch activators from binding to c
d. A mutation that prevents RNA polymerase from binding to d.
e. All of the above. - ANSWERSE
To produce the mRNA transcript, RNA polymerase reads the ____________ strand of
DNA in a _____________ direction.
a. Coding; 3' to 5'
b. Template; 3' to 5'
c. Coding; 5' to 3'
d. Template; 5' to 3' - ANSWERSB
A diploid organism has 10 total chromosomes. A cell from this organism has 5 total
chromosomes and 10 DNA molecules. This cell could be at which of the following
stages of cell division?
a. Directly after S phase, but before meiosis
b. prophase I
c. metaphase I
d. prophase II
e. after meiosis II and cytokinesis - ANSWERSD
Red eyes is dominant and white eyes is recessive. A fly with white eyes is crossed with
a homozygous fly with red eyes. What proportion of offspring will have white eyes?
a. 0
b. ¼
c. ½
d. 1 - ANSWERSA
Which of the following describes a scenario in which a population evolved?
a. A hurricane kills 90% of an island finch population in one day. The average beak
depth of the surviving finches is greater than the original population.
b. Humans arrive on an island and drain a swamp over the course of one week, killing
90% of a frog population. The average size of the surviving frogs is less than the
original population.
c. Climate change decreases the average rainfall on an island, causing the average size
of lizards to decrease over the course of two generations.
SOLVED RATED A+
Which of the following DOES NOT correctly fill in the blank? All cells contain ________.
a. DNA
b. RNA
c. Ribosomes
d. Nucleus
e. All of the above correctly fill in the blank. - ANSWERSD
Salmon swim up-river, reproduce, and then die. Which of the following salmon has the
highest fitness?
a. A salmon that lays 100 eggs of which 90 get eaten by ducks
b. A salmon that lays 125 eggs of which 75 hatch and 25 develop into fertile adults
c. A salmon that lays 125 eggs of which 100 hatch and 20 develop into fertile adults
d. A salmon that has the genes to produce 130 eggs, but gets eaten by a bear before
reproducing - ANSWERSB
According to the endosymbiosis theory, which of the following eukaryotic cell structures
evolved from bacterium that was engulfed by the common ancestor of all eukaryotes?
a. the plasma membrane
b. the endoplasmic reticulum (ER)
c. the nucleus
d. mitochondria
e. All of the above. - ANSWERSD
You have devised a system that allows you to stain thymine bases with a visible green
dye. You place some yeast cells into a growth media containing the dye solution and
allow the dye to become incorporated into both strands of the DNA. You then remove a
single yeast cell from the dye during G1 phase and allow it to go through two rounds of
cell division in a growth medium that contains no dye, but has all other necessary
components needed for replication. After one round of replication, what percentage of
the DNA molecules will contain an entire single strand that contains no green dye?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100% - ANSWERS
Only 1% of the bacteria in a population are resistant to the antibiotic rifampicin. Which of
the following environments would cause the % of rifampicin resistant bacteria to
increase over time?
, a. An environment without rifampicin or any other antibiotics. b. An environment without
rifampicin but containing other antibiotics.
c. An environment with rifampicin but not any other antibiotics.
d. Both B and C
e. none of the above - ANSWERSC
A population of stickleback fish is adapted to an environment where large fish such as
trout are their major predator. Which of the following would be a mutation that
decreases fitness?
a. A mutation that prevents switch activators from binding to a.
b. A mutation that prevents switch activators from binding to b.
c. A mutation that prevents switch activators from binding to c
d. A mutation that prevents RNA polymerase from binding to d.
e. All of the above. - ANSWERSE
To produce the mRNA transcript, RNA polymerase reads the ____________ strand of
DNA in a _____________ direction.
a. Coding; 3' to 5'
b. Template; 3' to 5'
c. Coding; 5' to 3'
d. Template; 5' to 3' - ANSWERSB
A diploid organism has 10 total chromosomes. A cell from this organism has 5 total
chromosomes and 10 DNA molecules. This cell could be at which of the following
stages of cell division?
a. Directly after S phase, but before meiosis
b. prophase I
c. metaphase I
d. prophase II
e. after meiosis II and cytokinesis - ANSWERSD
Red eyes is dominant and white eyes is recessive. A fly with white eyes is crossed with
a homozygous fly with red eyes. What proportion of offspring will have white eyes?
a. 0
b. ¼
c. ½
d. 1 - ANSWERSA
Which of the following describes a scenario in which a population evolved?
a. A hurricane kills 90% of an island finch population in one day. The average beak
depth of the surviving finches is greater than the original population.
b. Humans arrive on an island and drain a swamp over the course of one week, killing
90% of a frog population. The average size of the surviving frogs is less than the
original population.
c. Climate change decreases the average rainfall on an island, causing the average size
of lizards to decrease over the course of two generations.
