Question 1 2.5 / 2.5 points
Hypophosphatemia (vitamin D-resistant rickets) is inherited as a sex-linked dominant trait. The relevant gene is found on the X chromosome. What is the expected outcome of a cross between a homozygous recessive woman and a man with hypophosphatemia?
All of their daughters and none of their sons exhibit hypophosphatemia.
Fifty percent of their daughters and fifty percent of their sons exhibit hypophosphatemia.
All of their sons and none of their daughters exhibit hypophosphatemia.
Twenty-five percent of their offspring exhibit hypophosphatemia.
Question 2 2.5 / 2.5 points
In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the genotype of an individual who is heterozygous for dimples?
Question 3 2.5 / 2.5 points
Which of these techniques could tell you how gene expression differs between individuals with and without cystic fibrosis?
Question 4 2.5 / 2.5 points
Which of these is most likely to cause the development of a six-legged frog?
Mutation of homeotic genes
Conversion of a proto-oncogene to an oncogene
Question 5 2.5 / 2.5 points
Which of the following turns off transcription by binding to the operator?
Question 6 2.5 / 2.5 points
The region of DNA where RNA synthesis begins is the:
Question 7 2.5 / 2.5 points
The absence of a terminator in transcription will result in:
the creation of a virus.
a strand of mRNA that lacks its cap and tail.
the production of a longer RNA molecule.
the production of a shorter RNA molecule.
Question 8 2.5 / 2.5 points
Which of the following enzymes is responsible for RNA synthesis?
Question 9 0 / 2.5 points
Reproductive cloning can:
reacquire the genes it lost during the course of development.
come from an early stage of embryonic development.
be implanted in the egg of an organism that is capable of regenerating lost body parts.
Question 10 2.5 / 2.5 points
A couple has two female children. What is the probability that their next child will be male?
Question 11 2.5 / 2.5 points
Where is translation accomplished?
Smooth endoplasmic reticulum
Question 12 2.5 / 2.5 points
In eukaryotic cells, repressor proteins inhibit transcription by binding to:
Question 13 2.5 / 2.5 points
A mating between a purebred purple-flowered pea plant and a purebred white-flowered pea plant would produce a(n):
Question 14 2.5 / 2.5 points
Which risk factors are associated with cancer of the colon and rectum?
Question 15 2.5 / 2.5 points
The __________ is most commonly found in nature.
Question 16 2.5 / 2.5 points
Which of the following techniques is used to collect fetal cells during pregnancy for genetic testing?
Question 17 2.5 / 2.5 points
Transcription is the:
manufacture of a strand of RNA complementary to a strand of DNA.
manufacture of two new DNA double helices that are identical to an old DNA double helix.
modification of a strand of RNA prior to the manufacture of a protein.
manufacture of a protein based on information carried by RNA.
Question 18 2.5 / 2.5 points
More people die of __________ cancer than of any other cancer.
Question 19 2.5 / 2.5 points
What is the ultimate source of all diversity?
Question 20 2.5 / 2.5 points
__________ genes violate Mendel’s principle of independent assortment.
Lesson 3 & 4 Exam Part 1
Question 21 0 / 2.5 points
The Calvin cycle makes direct use of __________ to make __________.
light energy and CO2; sugar
CO2, ATP, and NADPH; sugar and O2
light energy, CO2, and water; sugar and O2
CO2, ATP, and NADPH; sugar
Question 22 2.5 / 2.5 points
What is the function of stomata?
Location of photosystems
Question 23 2.5 / 2.5 points
Which of the following is an autotroph?
Question 24 2.5 / 2.5 points
How many chromosomes does an individual with Turner syndrome have?
2n + 1
n + 1
2n – 1
n – 1
Question 25 2.5 / 2.5 points
What waste product do yeast produce under anaerobic conditions?
Question 26 2.5 / 2.5 points
What name is given to a discrete packet of light?
Question 27 2.5 / 2.5 points
The ultimate source of the energy in food is:
Question 28 2.5 / 2.5 points
the nuclear envelope breaks up.
sister chromatids separate.
chromosomes line up in the middle of the cell.
Question 29 2.5 / 2.5 points
What is responsible for the yellow-orange coloration of leaves in the fall?
Question 30 2.5 / 2.5 points
One difference between mitosis and meiosis is:
mitosis produces cells genetically identical to the parent cell, but meiosis does not.
mitosis produces more daughter cells than meiosis.
mitosis produces haploid cells, but meiosis produces diploid cells.
mitosis requires only one parent cell, but meiosis requires two parent cells.
Question 31 2.5 / 2.5 points
When a molecule absorbs a photon, one of its electrons is raised to the __________ state.
Question 32 2.5 / 2.5 points
What is the difference between a benign and a malignant tumor?
Benign tumors are composed of cancer cells; malignant tumors are not.
Benign tumors are not the result of a failure of a cell cycle control system; malignant tumors are.
Benign tumors do not metastasize; malignant tumors do.
Benign tumors do not form lumps; malignant tumors do form lumps.
Question 33 2.5 / 2.5 points
The light reactions of photosynthesis take place:
in the stroma.
on the cristae.
in the thylakoid membrane.
in the cytosol.
Question 34 2.5 / 2.5 points
If a plant appears blue to us, what wavelength of light is being reflected?
Question 35 2.5 / 2.5 points
A child is born with a rare disease in which mitochondria are missing from certain skeletal muscle cells. Physicians find that the muscle cells function. Not surprisingly, they also find that:
the muscles contain large amounts of lactic acid following even mild physical exercise.
the muscles contain large amounts of carbon dioxide following even mild physical exercise.
the muscles require extremely high levels of oxygen to function.
the muscle cells cannot split glucose to pyruvic acid.
Question 36 2.5 / 2.5 points
A horse eating some hay is an example of:
an autotroph eating a producer.
an autotroph eating a consumer.
a consumer eating a producer.
a consumer eating a heterotroph.
Question 37 2.5 / 2.5 points
Electron transport takes place in the:
Question 38 2.5 / 2.5 points
A __________ describes a site of crossing over.
Question 39 2.5 / 2.5 points
A(n) __________ is an example of an organism that can sometimes reproduce asexually.
Question 40 2.5 / 2.5 points
Chromosomes that do not determine the sex of an individual are called: