8. All of the human cells have the same 46 chromosomes, so they have the same genes so how do different cells have different proteins, enzymes, structures and functions?
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- 4. During inhalation, oxygen gas is transported from the alveoli of the lungs to the blood capillaries in the pulmonary circuit.What type of cellular transport facilitates the travel of oxygen from the alveoli to the capillaries? Active transport O Facilitated diffusion Osmosis O Simple diffusion 5. Which chromosomal disorder occurs as a result of having more or less chromosomes than the wild type? O Jacobsen syndrome O Fragile X syndrome Charcot-Marie-Tooth disease Klinefelter syndrome 6. Which hormone does NOT occur in high concentrations during ovulation? Luteinizing hormone Follicle stimulating hormone Estrogen Progesterone 7. In which region of the digestive tract does chemical digestion of food begin? Esophagus Mouth Stomach Small intestine10. The nuclei of a skin cell found in a gorilla contains 48 chromosomes. How many chromosomes would you expect to find in the other body cells that divide by mitosis? * 12 O 24 48 O 96A major difference between hereditary information in eukaryotes and prokaryotes is: a. in prokaryotes, the hereditary information is distributed among individual, linear DNA molecules in the nucleus. b. in eukaryotes, the hereditary information is encoded in a single, circular DNA molecule. c. in prokaryotes, the hereditary information is usually distributed among multiple circular DNA molecules in the cytoplasm. d. in eukaryotes, the hereditary information is distributed among individual, linear DNA molecules in the cytoplasm. e. in eukaryotes, the hereditary information is distributed amoung individual, linear DNA molecules in the nucleus.
- Which of the following events does not occur during some stages of interphase? DNA duplication organelle duplication increase in cell size separation of sister chromatidsThe first suggestion that chromosomes may physically exchange segments came from the microscopic identification of. synapsis sister chromatids chiasmata allelesWhat structure is most important in forming the tetrads? centromere synaptonemal complex chiasma kinetochore
- What is the main difference between autopolyploid and allopolyploid? the number of chromosomes the functionality of the chromosomes the source of the extra chromosomes the number of mutations in the extra chromosomesAn organism s traits are determined by the specific combination of inherited. cells. genes. proteins. chromatids.What is an oncogene? How might an oncogene affect the cell cycle?
- 13. What is the purpose of mitosis? (LS1-4) The purpose of mitosis is to make more diploid cells. O Produce new cells that are genetically different than the parent cell The purpose of mitosis is to make more haploid cells. Produce additional organelles for your existing cell5. If dividing cells are grown in a culture medium containing radioactive thymidine, the thymidine will be covalently incorporated into the cell's DNA during replication. The radioactive DNA can be detected in the nuclei of individual cells by autoradiography (i.e.. by placing a photographic film over the cells, radioactive cells will activate the film and show up as black dots when looked at under a microscope). During whatphase of the cell cycle will the radioactive thymidine be incorporated? Why?22. If there were a nonsense mutation in the gene encoding one of the main proteins of the kinetochore structure, what would be the likely outcome for the cell? Chromosomes would not condense Chromosomes would not be evenly distributed between daughter cells The nuclear envelope would not dissolve Centrosomes would not duplicate
