Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Part A What kind of inhibition is imposed on HIV protease by ritonavir? O irreversible inhibition O reversible inhibition O uncompetitive inhibition. Submit Request Answer
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- 3. (а) 0.0050 M operate at one-quarter of its maximum rate? At what substrate concentration would an enzyme with a kcat of 30.0 s-1 and a Km of (b) trations [So]: ½ Km, 2 KM, and 10 KM. Determine the fraction of Vmax that would be obtained at the following substrate concen- (c) 1 (HIV-1) has been the object of innumerable studies to develop effective chemotherapeutic agents. It has been shown that p6* known as the late assembly protein is an inhibitor of HIV protease. An assay was developed using an artificial polypeptide substrate containing a p-nitrophenylalanine residue at the cleavage point that undergoes a small change in absorption at 295 nm upon bond hydrolysis that could be followed spectrophotometrically. The cleavage of the peptide bond is shown schematically on the right. Results of the assay are given in the table below. The protease of the human immunodeficiency virus- Lys NH2 Ala Nle Arg Ala Val-Nle-NH-CH-Ċ–NH-Glu CH2 Lys NH2 Ala NO2 Nle Arg H2Ó N HIV-1 protease Ala Vo…arrow_forwardAt what DNA strand is the ACTB gene coded? How many ACTB genes are coded in this region?arrow_forwardLạc Y [ Choose ] operator [ Choose ] Lạc Z [ Choose ] operon [ Choose ] trans-acting [ Choose ] cis-acting [ Choose ] negative regulation [ Choose ] > > > > > > >arrow_forward
- Match the letter in the diagram with the accumulation or localization of active (or about to be active) protein in a given cellular context, which is wild-type unless specified. AD5CESarrow_forwardDuring termination, the release factor binds this site A site E site P sitearrow_forwardRead the following statements about operons, and mark the FALSE one. O a. Prokaryotes use operons frequently because they are an efficient use of resources O b. The expression levels of the genes in an operon can be regulated individually Genes in an operon are placed next to each other (physically) O d. The genes in an operon share a single promoterarrow_forward
- 1e regulation of the lac operon by cAMP-CAP complex is an example of positive regulation. what in general does it mean to say that a gene or operon is subject to positive regulation?arrow_forwardUsing M cyclin-Cdk as a specific model describe the different ways it can be activated or de-activated.arrow_forward8:20 ■■ LTE < Spring 2024 - Senior Comprehensives (... Question 6ɔ (ividitudtory) In the Lac operon, what happens when allolactose attaches to the repressor protein? a) b) c) the repressor is induced to attach to the promoter RNA polymerase is induced to attach to the operator lactose synthesis enzymes are produced by genes Z, Y,A d) the repressor is inactivated Question 88 (Mandatory) What is the purpose of X-chromosome inactivation in mammals? a) It accomplishes dosage compensation. b) It assists in the interactions beteeen genes Tra and Dsx. c) It prevents trisomy from occurring. d) It produces the testis determination factor. Question 94 (Mandatory) Duchenne muscular dystrophy is inherited in an X- linked recessive pattern. A female is known to be heterozygous for Du muscular dystrophy XD xdarrow_forward
- why does the activation of M-cdk also result in the activation of Cdc25? What is the mechanism behind it?arrow_forwardGive only typing answer with explanation and conclusion For the genotype shown below, which best describes the expression of the B-galactosidase gene. I+ Oc Z+ / F’ Is Constitutive Repressed Inducible None of the abovearrow_forwardExplain the effect of lacI− mutations?arrow_forward
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