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- 8) Which of these describes the function of RNA polymerase? A. Amplifies the “message" by making multiple copies of an mRNA molecule after it has been transcribed from DNA B. Converts a protein sequence to mRNA20. The image above reveals two bacterial cells in the process of A. cell lysis B. transduction C. conjugation D. transformation -NAM-NAG-NAM-NAG D-Glu D-Ala D/ Transpeptidase D-Ala DAP T 1 D-Ala D-Glu L-Ala NAG-NAM-NAG-NAM FYRET E. budding K 21. Modification of the enzyme pictured (above) might result in resistance to A. quinolone B. streptomycin C. chloramphenicol D. penicillin E. trimethoprimslation is synthesis of proteins from B. C. D. t-RNA m-RNA r-RNA DNA 41. It is a type of mutation which modifies the whole sequence of the amino acids. A. В. C. D. 42. Which of the following is a result of a genetic mutation? Inversion Additions Substitutions Replication A. Kwashiorkor Scurvy Cystic Fibrosis Marasmus В. С. D. 43. Which of the following medical condition is a result of a substitution mutation? A. Sickle cell anemia B. Tay-sach's disease C. Cystic Fibrosis D. Some Cancer 44. Lung cancer is caused by which of the following factors? A. В. Addition Inversion Substitution Polycyclic Aromatic Hydrocarbons С. D. 45. Which of the following are called mutagens А. Chemicals that induce changes in DNA В. Chemicals that induce changes in Proteins. C. Chemicals that induce changes in Carbohydrates. D. Chemicals that induce changes in Lipids. 46. Glycolyis is under of the following metabolic pathway? Chain reaction Chemical reaction Anabolic reaction Catabolic reaction А. В. С. D.…
- of malaria e. More than one answer is correct During the transcription of a given portion of a DNA molecule Select one: a. MRNA is synthesized on only one of the chains b. any of the patterns may be found c. half of the MRNA is synthesized on half of one chain; then the other half of the MRNA is made on the other half of the DNA d. MRNA is synthesized on both chains of the DNA molecule, but first on one side and then the other e. MRNA is synthesized on both chains of the DNA molecule at once The nucleotides CTA were paired with the nucleotides GAU by a cell that carried out its daily activities. This pairing occurred Select one: a. when an mRNA codon paired with a TRNA anticodon b. It is impossible to say, given this information C. during transcriptionThere have been recurring cases of mad-cow disease in the United Kingdom since the mid-1990s. Mad-cow disease is caused by a prion, an infectious particle that consists only of protein. In 1986, the media began reporting that cows all over England were dying from a mysterious disease. Initially, there was little interest in determining whether humans could be affected. For 10 years, the British government maintained that this unusual disease could not be transmitted to humans. However, in March 1996, the government did an about-face and announced that bovine spongiform encephalopathy (BSE), commonly known as mad-cow disease, can be transmitted to humans, where it is known as variant Creutzfeldt-Jakob disease (VCJD). As in cows, this disease eats away at the nervous system, destroying the brain and essentially turning it into a spongelike structure filled with holes. Victims experience dementia; confusion; loss of speech, sight, and hearing; convulsions; coma; and finally death. Prion diseases are always fatal, and there is no treatment. Precautionary measures taken in Britain to prevent this disease in humans may have begun too late. Many of the victims contracted it over a decade earlier, when the BSE epidemic began, and the incubation period is long (VCJD has an incubation period of 10 to 40 years). A recent study concluded that 1 in 2,000 people in Great Britain carry the abnormally folded protein that causes VCJD. In spite of these numbers, the death rate from VCJD remains low. It is not clear whether this means that the incubation period for the disease is much longer than previously thought, or whether they may never develop the disease. How can a prion replicate itself without genetic material?1. Which type of mutation results in no change in amino acid sequence for the protein? a Silent b Missense c Nonsense d Frameshift
- which of these describes the symptoms of the disease(s) caused by mutations in this gene CAGATTGTGAAGAGGTCTCTTGA? Select all that apply a. Thread-like blood vessels in eyes b. Excessive bleeding c. Dwarfism d. UV light sensitivity e. sunburn f. Bruisesa.Label the diagram b.What is one differences between initiation of prokaryotic and eukaryotic translation? A A AUCG 5'TT GGGUUUACG G E B.10. What would be the result if a cell failed to express a functional signal peptidase enzyme? a. It would be unable to import proteins into the nucleus b. It would be unable to export proteins out of the nucleus c. It would be unable to synthesize any proteins d. It would be unable to secrete proteins e. Both a and b are correct answers
- I. List the sequences of RNA that would be transcribed from the following DNA template sequences. a. TTACACTTGCTTGAGAGTC Ans: b. АСТTGGGCTАTGCTCATTA Ans: c. Ans: GGCTGCAATAGCССТAGAT d. GGAATACGTCTAGCTAGCA Ans:D. radiodurans can survive strong ionizing radiation (gamma radiation). What DNA repair process? a. Reverse transcription b. Translation c. Homologous recombination d. DNA replication e. Transcription35. Which of the following statement relating to the cell nucleus is inaccurate? a. all body cells are nucleated b. the nuclear envelope is a non-porous double-layered membrane c. contains nucleoli that are involved in tRNA synthesis d. a and b e. a, b, and c