| Lesson 3 & 4 Exam Part 2 |
| 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?
Question options:
|
| 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 options:
|
| <i>DD</i> | ||
|
| <i>Dd</i> | ||
|
| <i>dd</i> | ||
|
| <i>DI</i> | ||
| 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 options:
|
| Therapeutic cloning | ||
|
| DNA microarray | ||
|
| Reproductive cloning | ||
|
| Karyotyping | ||
| Question 4 | 2.5 / 2.5 points | ||
Which of these is most likely to cause the development of a six-legged frog?
Question options:
|
| Mutation of homeotic genes | ||
|
| Artificial selection | ||
|
| Dietary supplementation | ||
|
| 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 options:
|
| RNA polymerase | ||
|
| Repressor | ||
|
| Promoter | ||
|
| Lactose | ||
| Question 6 | 2.5 / 2.5 points | ||
The region of DNA where RNA synthesis begins is the:
Question options:
|
| start codon. | ||
|
| promoter. | ||
|
| initiator. | ||
|
| processor. | ||
| Question 7 | 2.5 / 2.5 points | ||
The absence of a terminator in transcription will result in:
Question options:
|
| 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 options:
|
| RNase | ||
|
| RNA helicase | ||
|
| RNA ligase | ||
|
| RNA polymerase | ||
| Question 9 | 0 / 2.5 points | ||
Reproductive cloning can:
Question options:
|
| reacquire the genes it lost during the course of development. | ||
|
| come from an early stage of embryonic development. | ||
|
| be differentiated. | ||
|
| 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 options:
|
| 25% | ||
|
| 50% | ||
|
| 33% | ||
|
| 67% | ||
| Question 11 | 2.5 / 2.5 points | ||
Where is translation accomplished?
Question options:
|
| Lysosomes | ||
|
| Smooth endoplasmic reticulum | ||
|
| Ribosomes | ||
|
| Nucleoli | ||
| Question 12 | 2.5 / 2.5 points | ||
In eukaryotic cells, repressor proteins inhibit transcription by binding to:
Question options:
|
| silencers. | ||
|
| enhancers. | ||
|
| regulators. | ||
|
| operators. | ||
| 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 options:
|
| purebred variety. | ||
|
| hybrid. | ||
|
| P generation. | ||
|
| F<sub>2</sub> generation. | ||
| Question 14 | 2.5 / 2.5 points | ||
Which risk factors are associated with cancer of the colon and rectum?
Question options:
|
| Tobacco | ||
|
| Radio waves | ||
|
| UV radiation | ||
|
| Dietary fat | ||
| Question 15 | 2.5 / 2.5 points | ||
The __________ is most commonly found in nature.
Question options:
|
| recessive trait | ||
|
| wild-type trait | ||
|
| parental | ||
|
| dominant trait | ||
| Question 16 | 2.5 / 2.5 points | ||
Which of the following techniques is used to collect fetal cells during pregnancy for genetic testing?
Question options:
|
| Testcross | ||
|
| Dihybrid cross | ||
|
| Amniocentesis | ||
|
| Pedigree analysis | ||
| Question 17 | 2.5 / 2.5 points | ||
Transcription is the:
Question options:
|
| 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 options:
|
| lung | ||
|
| skin | ||
|
| pancreatic | ||
|
| breast | ||
| Question 19 | 2.5 / 2.5 points | ||
What is the ultimate source of all diversity?
Question options:
|
| Natural selection | ||
|
| Sexual recombination | ||
|
| Meiosis | ||
|
| Mutation | ||
| Question 20 | 2.5 / 2.5 points | ||
__________ genes violate Mendel's principle of independent assortment.
Question options:
|
| Codominant | |
|
| Linked | |
|
| Recessive | |
|
| Pleiotropic | |
| Lesson 3 & 4 Exam Part 1 | ||
| Question 21 | 0 / 2.5 points |
The Calvin cycle makes direct use of __________ to make __________.
Question options:
|
| light energy and CO<sub>2</sub>; sugar | ||
|
| CO<sub>2</sub>, ATP, and NADPH; sugar and O<sub>2</sub> | ||
|
| light energy, CO<sub>2</sub>, and water; sugar and O<sub>2</sub> | ||
|
| CO<sub>2</sub>, ATP, and NADPH; sugar | ||
| Question 22 | 2.5 / 2.5 points | ||
What is the function of stomata?
Question options:
|
| Water absorption | ||
|
| Calvin cycle | ||
|
| Location of photosystems | ||
|
| Gas exchange | ||
| Question 23 | 2.5 / 2.5 points | ||
Which of the following is an autotroph?
Question options:
|
| Human | ||
|
| Mushroom | ||
|
| Pine tree | ||
|
| Fish | ||
| Question 24 | 2.5 / 2.5 points | ||
How many chromosomes does an individual with Turner syndrome have?
Question options:
|
| 2<i>n</i> + 1 | ||
|
| <i>n</i> + 1 | ||
|
| 2<i>n</i> - 1 | ||
|
| <i>n</i> - 1 | ||
| Question 25 | 2.5 / 2.5 points | ||
What waste product do yeast produce under anaerobic conditions?
Question options:
|
| Ethyl alcohol | ||
|
| Pyruvic acid | ||
|
| Lactic acid | ||
|
| Creatine | ||
| Question 26 | 2.5 / 2.5 points | ||
What name is given to a discrete packet of light?
Question options:
|
| Phaser | ||
|
| Wavelength | ||
|
| Photon | ||
|
| Quantum | ||
| Question 27 | 2.5 / 2.5 points | ||
The ultimate source of the energy in food is:
Question options:
|
| the sun. | ||
|
| producers. | ||
|
| ATP. | ||
|
| consumers. | ||
| Question 28 | 2.5 / 2.5 points | ||
During metaphase:
Question options:
|
| the nuclear envelope breaks up. | ||
|
| sister chromatids separate. | ||
|
| centromeres divide. | ||
|
| 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 options:
|
| RuBP | ||
|
| <p> Chlorophyll <i>a</i></p> | ||
|
| Carotenoids | ||
|
| <p> Chlorophyll <i>b</i></p> | ||
| Question 30 | 2.5 / 2.5 points | ||
One difference between mitosis and meiosis is:
Question options:
|
| 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 options:
|
| energetic | ||
|
| quantum | ||
|
| higher | ||
|
| excited | ||
| Question 32 | 2.5 / 2.5 points | ||
What is the difference between a benign and a malignant tumor?
Question options:
|
| 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:
Question options:
|
| 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 options:
|
| Blue | ||
|
| Green | ||
|
| Red | ||
|
| Yellow | ||
| 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:
Question options:
|
| 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:
Question options:
|
| 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 options:
|
| mitochondria. | ||
|
| chloroplasts. | ||
|
| cytoplasm. | ||
|
| ribosomes. | ||
| Question 38 | 2.5 / 2.5 points | ||
A __________ describes a site of crossing over.
Question options:
|
| chiasma | ||
|
| histone | ||
|
| synapse | ||
|
| centromere | ||
| Question 39 | 2.5 / 2.5 points | ||
A(n) __________ is an example of an organism that can sometimes reproduce asexually.
Question options:
|
| cat | ||
|
| human | ||
|
| Komodo dragon | ||
|
| mouse | ||
| Question 40 | 2.5 / 2.5 points | ||
Chromosomes that do not determine the sex of an individual are called:
Question options:
|
| homologous chromosomes. |
|
| nonhomologous chromosomes. |
|
| sex chromosomes. |
|
| autosomes.
|
No comments:
Post a Comment