Question

21) Recombinant DNA refers to the a.study of bacterial ribosomes. b. study of the function of genes. c. interaction between human and bacterial cells. d. synthesis of proteins from genes we DNA resulting when genes from one organism are inserted into another organism. 22) Molecular biology includes the study of O DNA synthesis b. RNA replication c. protein synthesis. d. erryme function, how genetic information directs protein synthesis. 23) Which of the following is an example of a beneficial function of microorganisms a alternative fuel production. b. bioremediation C gene therapy. d agriculture al of the above T none of the above 24) The major food producers for other living organisms is/are a higher plants. b. cyanobacteria. c. algoe. d. higher plants and algae. higher plants, cyanobacteria, and algae. 25) Gene therapy is currently used to treat all of the following diseases EXCEPT a. Severe combined immunodeficiency disease (SCID). b. Duchenne's muscular dystrophy. C. cystic fibrosis d. LDL-receptor deficiency colon cancer. 26) Recombinant DNA technology has become an increasingly important part of our life. It is used for which of the following? a vaccine production, b. enhancing food longevity c. drug production. d. increasing the nutritional value of food. G al of the above 27) Normal microbiota a. take up residence in sites such as the colon and mouth. b. almost always cause disease in the host. c. are normally found in blood. O both indefinitely colonize the body and take up residence in sites such as the colon and mouth 28) Which of the following statements about biofilms is FALSE? a Biofilms in pipes can block the flow of water b. Biofilms in your body protect mucous membranes from harmful microbes C Biofilms on medical devices Couse infections d. Biofilms on rocks provide food for animal life Compared to free-living bacteria, biofilms are more sensitive to antibiotics 29) Development of emerging Infectious disease can be a result of all of the following EXCEPT o microbiol mutation. b. modern transportation A use of genetically modified foods d changes in the environment e overuse of antibiotics. 30) A student has obtained a sample of pond water for study. Using the high-power lens, he observes several cells with nuclei. He can conclude that the cells are NOT bacteria. Answer: Chapter 2 Chemical Principles 31) Which of the following statements about the following atom is 2C FALSE? osuus von * X . It has 6 protons in its nucleus. Cas It has 12 neutrons in its nucleus. C. It has 6 electrons orbiting the nucleus. d. Its atomic number is 6. e. Its atomic weight is 12. 31 Page

Answer 1

21) recombinant DNA refers to the DNA resulting when genes from one organism are inserted into another organism.
Hence, option "e" is the correct answer.

22) molecular biology includes the study of how genetic information directs protein synthesis.
Hence, option "e" is the correct answer.

23) microorganisms are used for alternative fuel production, bioremediation, gene therapy, agriculture like many purposes.
Hence, option "e" is the correct answer.

24) the major food producers for other living organisms are most of the autotrophs, which include higher plants, cyanobacteria and algae.
Hence, option "e" is the correct answer.

25) severe combined immunodeficiency disease occurs due to deficiency of adenosine deaminase coding gene. So it can be treated by gene therapy.
Duchenne's muscular dystrophy can be treated by using gene therapy.
Cystic fibrosis can be treated by gene therapy.
But there is no gene therapy for LDL- receptor deficiency.
Hence, option "d" is the correct answer.

26) Recombinant DNA technology is used for the production of vaccines, increasing food longevity, drug production, increasing the nutritional value of the food etc.
Hence, option "e" is the correct answer.

27) Normal microbiota can indefinitely colonize the body and take up residence in sites such as the colon and mouth.
Hence, option "d" is the correct answer.

28) Biofilm-associated bacteria are less sensitive to antibiotics than free-living cells.
Hence, option, "e" is the correct answer.

29) use of genetically modified foods doesn't cause the emerging infectious disease.
Hence, option "c" is the correct answer.

30) cells with nuclei are eukaryotic cells, whereas bacteria are prokaryotes.
Hence, the given statement is true.

31) The given atom has 6 protons, 6 electrons and 6 neutrons.
Hence, option, "b" is the correct answer.