Cutting DNA with a particular restriction enzyme produces DNA fragments that can be separated by?
Question 1Correct Mark 4.00 out of 4.00Question textOne of the proposed solutions to global warming is to grow a large number of trees. This could be effective because:Select one:a. trees would move carbon from CO2 in the atmosphere to organic molecules.b. when decomposed, plant carbon is impossible to convert back to CO2.c. the gross primary production of trees moves CO2 into soil.d. plant carbon is different from atmospheric carbon.e. plants are the base of all ecological food chains.FeedbackThe correct answer is: trees would move carbon from CO2 in the atmosphere to organic molecules.. Question 2Correct Mark 4.00 out of 4.00Question textOxygen has a high concentration in the lungs. It move into the blood where there is a lower concentration of oxygen. This is an example of which of the following processes?Select one:a. Diffusionb. Active transportc. Osmosisd. PhagocytosisFeedbackThe correct answer is: Diffusion. Question 3Correct Mark 4.00 out of 4.00Question textWhat have we learned from the study of fossils?Select one:a. The oldest fossils are found in the highest rock layersb. Many animals that lived in the past are different from animals todayc. Humans and dinosaurs lived at the same time.d. Most of the animals from the past are just like animals todayFeedbackThe correct answer is: Many animals that lived in the past are different from animals today. Question 4Incorrect Mark 0.00 out of 4.00Question textNondisjunction will result in which of the following?Select one:a. Trisomyb. A recessive traitc. An X-linked traitd. A dominate traitFeedbackThe correct answer is: Trisomy. Question 5Correct Mark 4.00 out of 4.00Question textWhat is the abnormality associated with this karyotype?Select one:a. Down syndromeb. Klienfelter syndromec. Turner syndromed. Edward syndromee. Patau syndromeFeedbackThe correct answer is: Down syndrome .Question 6Correct Mark 4.00 out of 4.00Question textThe "ozone hole" is caused by the:Select one:a. buildup of toxic ozone in the troposphere over cities such as Los Angeles from human-caused pollution.b. depletion of ozone in the troposphere by chemicals such as CFCs.c. depletion of ozone in the troposphere due to greenhouse gases.d. increase in warming due to high levels of ozone in the troposphere.e. depletion of ozone in the stratosphere by chemicals such as CFCs.FeedbackThe correct answer is: depletion of ozone in the stratosphere by chemicals such as CFCs.. Question 7Correct Mark 4.00 out of 4.00Question textIf the sequence TCGTA was used as a template in DNA replication, what would the sequence of bases be on the newly synthesized strand?Select one:a. AGCATb. TCGTAc. ATGCTd. CTACGe. GCATCFeedbackThe correct answer is: AGCAT. Question 8Correct Mark 4.00 out of 4.00Question textToo much nutrient runoff, particularly from nitrogen fertilizers, can cause dead zones in bodies of water.Select one:TrueFalseFeedbackThe correct answer is 'True'. Question 9Correct Mark 4.00 out of 4.00Question textDNA is a double stranded moleculeSelect one:TrueFalseFeedbackThe correct answer is 'True'. Question 10Correct Mark 4.00 out of 4.00Question textRNA is a double stranded moleculeSelect one:TrueFalseFeedbackThe correct answer is 'False'. Question 11Correct Mark 4.00 out of 4.00Question textA tentative explanation of an observation is which of the following?Select one:a. Experimentb. Hypothesisc. Lawd. Scientific theoryFeedbackThe correct answer is: Hypothesis. Question 12Correct Mark 4.00 out of 4.00Question textCancer is the result of uncontrolled cell divisionSelect one:TrueFalseFeedbackThe correct answer is 'True'. Question 13Correct Mark 4.00 out of 4.00Question textWhich of the following is a biotic factor of an ecosystem?Select one:a. oxygenb. soil mineralsc. waterd. bacteriaFeedbackThe correct answer is: bacteria. Question 14Correct Mark 4.00 out of 4.00Question textWho developed the binomial system for naming species?Select one:a. Stanley Millerb. Carolus Linnaeusc. Gregor Mendeld. Charles Darwine. Watson and CrickFeedbackThe correct answer is: Carolus Linnaeus. Question 15Correct Mark 4.00 out of 4.00Question textA gene pool is all the alleles in a populationSelect one:TrueFalseFeedbackThe correct answer is 'True'. Question 16Correct Mark 4.00 out of 4.00Question textA change in a gene or chromosome is which of the following?Select one:a. Mutationb. Phenotypec. Alleled. GenotypeFeedbackThe correct answer is: Mutation. Question 17Correct Mark 4.00 out of 4.00Question textX-linked recessive traits are more common in males than females.Select one:TrueFalseFeedbackThe correct answer is 'True'. Question 18Correct Mark 4.00 out of 4.00Question textA man with type O blood marries a woman with type Ablood. What is the chance of them having a child with typeO blood? (Assume she is heterozygous = AO)Select one:a. 0%b. 50%c. 100%d. 75%e. 25%FeedbackThe correct answer is: 50%. Question 19Incorrect Mark 0.00 out of 4.00Question textJohn has just eaten a very salty meal and the amount of salt in his blood has increased above normal. Water enters the blood to raise his blood pressure. This is an example of which of the following?Select one:a. Phagocytosisb. Osmosisc. Active Transportd. DiffusionFeedbackThe correct answer is: Osmosis. Question 20Incorrect Mark 0.00 out of 4.00Question textWhich large animals were wiped out by the Cretaceous extinction?Select one:a. sharksb. mammothc. dinosaursd. whalesFeedbackThe correct answer is: dinosaurs. Question 21Correct Mark 4.00 out of 4.00Question textDuring which of these eras were dinosaurs dominant?Select one:a. Paleozoicb. Mesozoicc. Cenozoicd. PrecambrianFeedbackThe correct answer is: Mesozoic. Question 22Correct Mark 4.00 out of 4.00Question textThe studies of DNA have confirmed the same basic evolutionary pattern that was established with fossils.Select one:TrueFalseFeedbackThe correct answer is 'True'. Question 23Correct Mark 4.00 out of 4.00Question textDwarfism is a dominant trait. A heterozygous dwarf marries a person with normal height. What is the chance they will have a child that is a dwarf?Select one:a. 25%b. 50%c. 75%d. 100%e. 0%FeedbackThe correct answer is: 50%. Question 24Correct Mark 4.00 out of 4.00Question textAltering cells or biological molecules for a specific application is:Select one:a. Biologyb. Biotechnologyc. Geneticsd. PhotosynthesisFeedbackThe correct answer is: Biotechnology. Question 25Correct Mark 4.00 out of 4.00Question textWhich aspect of biotechnology has been used to clear innocent people of crimes they were accused of committing?Select one:a. transformed plasmidsb. restriction enzymesc. forensic DNA typingd. transgenic organismsFeedbackThe correct answer is: forensic DNA typing.
