3:09 1 < Back Pulse Question 25 (Mandatory) The villi and microvilli are found in the a) liver b) pancreas c) stomach d) small intestine e) large intestine Question 26 (Mandatory) If the regulator gene for lactose is completely removed or deleted, the operon will become: a) inactive b) permanently turned on d) cannot be determined permanently turned off Question 27 (Mandatory) are an individual's set of specific marker proteins Toung on cell surfaces.
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- 60. During an experiment, an inbred mouse strain is developed that has a homozygous mutation for the gene encoding the J chain. Immunoglobulins produced by these mice are most likely to have alterations in which of the following biologic properties? 00 A) Ability to pass across the placenta B) Attachment to Fc receptors on eosinophils C) Neutralization of toxins D) Opsonization of encapsulated bacteria E) Secretion across mucosal epithelial cellsA scientist discovers a virus encoding a Protein X that degrades a subunit of the elF4F complex. Knowing that this virus transcribes its own mRNAs in the cytoplasm of human cells, why would Protein X be an effective virulence factor?Please answer the following questions, no need to explain each choices just explain the correct answer. 1. Which of the following has only one equivalent codon? A) Ala B) Arg C) Val D) Trp E) Gly 2. Which of the following does not describe transcription? A) Synthesis of RNA using DNA as the template B) Requires DNA-dependent RNA Pol C) Highly selective process that is strictly regulated D) A step in gene expression E) None of the above
- 69- Which one is not a chromosomal disease? a) Von Recklinghausen disease b) Patau disease c) Edward disease d) Down Syndrome Fetalis erythroblastosis 70- Mr. Bryan came to the hospital for weight loss and refractory cough. After many investigations, he is diagnosed of Lung cancer, especially mesothelioma. He admits to have been a construction worker most of his life, and has been frequently in in contact with asbestos. What is the influential factor of development in this case? a) Culture Environment c) Heredity d) None of the above 71- Which one is not a teratogen agent in pregnancy? a) Caffeine b) Tobacco c) Outside environmental Hazard d) Driving 72- What happens during the third stage of childbirth? a) Extraction of the placenta b) Contractions of the Uterus Extraction of the baby d) Dilation of the cervix 73- A 2 days old baby is brought to the emergency by his parents because a yellow coloration of his skin has been noticed. They ask the nurse if their baby has a serious…62) If you want to inhibit protein synthesis on the transcriptional level you would use: a) Tetracyclin b) Vancomycin c) Macrolides d) Fluroquinolones e) a & c 63) The protein that prevents the formation of off-centered septation in bacteria is: a) FtsZ b) MreB c) MinCD d) Tubulin e) Septin 64) The autoclave pressure must reach at least ________ in order to effectively kill the bacterial spores: a)15 psi b) 15 Joules c) 15 Kilograms d) 15 Lbs e) 15 Kilocalories 65) Incineration is a type of ______ method in controlling bacterial growth: a) moist heat b) dry heat c) chemical d) chemotherapeutic e) genetic.Which antiretroviral drug class does Zidovudine (AZT) belong to? a) Non-nucleoside reverse transcriptase inhibitors (NNRTIs) b) Nucleoside reverse transcriptase inhibitors (NRTIs) c) Protease inhibitors d) Integrase inhibitors
- 5'--TTAATGGGACAGCTTGTGTAGAGG--3' a.) What is the complementary strand of DNA? b.) What is the transcribed mRNA sequence? c.) What is the amino acid sequence translated from the strand of mRNA synthesized in52. During the development of a new vaccine, an investigator generates a mutant strain of bacteria that does not adhere to mucosal epithelia, Mutations in which of the following bacterial components or structures would most likely prevent bacterial adhesion? htba OA) Capsules OB) Flagella OC) Lipopolysaccharide OD) Lipoteichoic acid OE) Pili OF) Porins OG) Siderophores OH) Spores in 1thou (moon) Pili21:14 +4G KB/S LTED 41 96 09.00 Vo Microsoft Word - Assignment 02.docx Assignment 02 1. Groups of alleles associated with the lactose operon are as follows (in order of dominance for each allelic series): repressor, IS (superrepressor), I *(inducible), and I "(constitutive); operator, OC (constitutive, cis dominant) and 0+ (inducible, cis- dominant); structural, Z and Y. (a) Which of the following genotypes will produce B-galactosidase and B-galactoside permease if lactose is present: (1) 1*0* Z* Y*, (2) 1 *OCZ+ Y+, (3) OCZ+ Y+, (4) IS O+ Z+ Y+, and (5) 10+ Z+Y+? (b) Which of the above genotypes will produce ß-galactosidase and ß-galactoside permease if lactose is absent? Why? 2. By what mechanism does the presence of tryptophan in the medium in which E. coli cells are growing result in premature termination or attenuation of transcription of the trp operon? 3. Suppose that you used site-specific mutagenesis to modify the trpL sequence such that the two UGG Trp codons at positions…
- the nucleotide excision repair system can undo damaging caused by UV radiation? a) cataracts in lens of the eye b) protein-protein cross-links c) thymine dimers d) alternative splicing errors e) apurinic sitesTay-Sachs disease is result from a)malfunction of cerebroside metabolism b)the accumulation of GM2 c) a defiency of GM2 d) defective lysosomesAll questions a) What is the DNA base sequence of Codon 1? b) What is the anticodon sequence for Codon 1? c) Name the enzyme involved in the production of Y.