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12 questions
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- Q1In an effort to reduce the number of deaths due to malaria, scientists have successfully introduced a gene into mosquitoes. The gene makes the mosquitoes unable to support the development of the parasite that causes malaria. The technique used to produce this new variety of mosquito is most likelyselective breedingchromatographyelectrophoresis of genesgenetic engineering60s4.2
- Q2The organic compounds that scientists use to cut, copy, and move segments of DNA arestarchesenzymescarbohydrateshormones60s4.2
- Q3Scientists have found a gene that makes a protein called PKG that controls certain behaviors in many types of ants. The soldier ant will help collect food when it has a low level of PKG. When it has a high level of PKG, the soldier ant will protect and defend its colony. Soldier ants that are given PKG are more likely to ignore food sources and attack intruders. Which concPKG protein is synthesized only by the soldier antsThe behavior of soldier ants is controlled in part by the PKG protein.Eating too much protein makes some organisms very aggressive.Genes control which type of amino acids a cell can make60s4.2
- Q4Genetic researchers have discovered a number of different gene mutations that have led to the development of cancer. These mutations affect how frequently a cell reproduces. Which process would be directly influenced by these mutations?division of sperm and egg cellsmitotic cell divisiondifferentiation of cells in an embryomeiotic cell division60s4.2
- Q5Lobsters are crustaceans related to crayfish, crabs, and shrimp. Most lobsters are a reddishbrown color, but on rare occasions, they can be orange, blue, or even multicolored. These color differences can be caused bythe instability of the ecosystemgenetic variationsoverpopulation and excessive resourcesdifferent numbers of offspring60s4.2
- Q6The best explanation for the differences in the appearance of the twins is thattwin B is older than twin Athe expression of genes is influenced by the environmentone twin resembles the mother and the other resembles the fatherthey each inherited half of their DNA from each parent60s4.2
- Q760s4.2
- Q8The best explanation for why sea slugs are able to pass on this ability to make food to their offspring is that.making food is benefi cial, so the slugs needed to mutatethe environment causes the slugs to become greenthe gene for making algae is in all their body cellsthe gene for chlorophyll production is part of their DNA60s4.2
- Q9Siamese cats have dark fur on areas of the body that are cooler and light fur on parts of the body that are warmer. The color differences in this Siamese cat are most likely due tomore DNA molecules being produced in areas with light furmutations in the genes for eye colorgene expression being influenced by the environmenta decrease in glucose produced in areas with light fur60s4.2
- Q10Body cells include nerve cells and muscle cells. Each makes a number of different proteins. For example, nerve cells make cholinesterase and muscle cells make myosin. Which statement best compares the DNA normally found in these two types of cells in an individual?The two cells have different DNA sequences and use different sections of the DNA to make these two proteins.The two cells have identical DNA sequences and use the same section of the DNA to make these two proteinsThe two cells have identical DNA sequences, but use different sections of the DNA to make these two proteinsThe two cells have different DNA sequences, but use the same section of the DNA to make these two proteins.60s4.2
- Q11The errors indicated by * could affect a cell byconverting the original cell into a different type of cellchanging the sequence of amino acids during the formation of a specifi c proteinconverting sugar molecules into molecules of proteinaltering the number of chromosomes present in the cytoplasm60s4.2
- Q12The process by which a cell copies its DNA before it divides isrespirationdiffusionmutationreplication60s4.2