Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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After lambda infects a cell, how does it decide to create a lysogen? Name the major cis and trans
players and their function.
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- Which of the following bacterial operon is not controlled by attenuation? a) Histidine b) Leucine c) Arabinose d) Tryptophanarrow_forwardThis question combines your knowledge of bacterial conjugationand the genetic regulation that directs thephage λ reproductive cycles. When researchers mix donor Hfr strains with recipient F– bacteria that are lysogenic for phage λ, the conjugated cells survive normally. However, if donor Hfr strains that are lysogenic for phage λ conjugate with recipient F– bacteria that do not contain any phage λ, the recipient cells often lyse, due to the induction of λ into the lytic cycle. Based on your knowledge of the regulation of the two reproductive cycles of phage λ, explain this experimental observation.arrow_forwardWhat is the major difference between generalized transductionand transformation?arrow_forward
- Consider the V region domains of the TCRα and TCRβ chains and the genetic loci that encode them. Which TCR chain is more genetically analogous to the Ig heavy chain?arrow_forwardDescribe what process leads to gene conversion. What are the consequences of gene conversion for carriers of genetic diseases, such as BRCA mutations?arrow_forwardWhich protein product of HTLV-1 functions as a transcriptional activator and is also considered to be the major viral oncoprotein?arrow_forward
- What is meant by the term site-specific recombination as used in identifying the processes that lead to the integration of temperate bacteriophages into host bacterial chromosomes during lysogeny or to the formation of specialized transducing phage?arrow_forward1) Assume you have an operon that is repressible. In this case, the rate of synthesis of repressor protein must depend on the level of a) co-repressor b) inducer c) both d) neitherarrow_forwardGive one examples of mutaion?arrow_forward
- Describe what would happen to the lac operon in a low-lactose environment and in a high lactose environment. a) How will each of these environments affect gene expression? b) What would happen to the repressor in each case? c) How will each of these environments affect RNA polymerase?arrow_forwardMany oncogenes result from mutations that cause excessive expression of a protein in cells where it is normally not expressed or is expressed at inappropriate times during development. This type of mutation can be described as ________. A) amorphic B) hypomorphic C)hypermorphic D) neomorphic E) dominant negativearrow_forwardWhat are the roles of Cas1, Cas2, and Cas9 proteins in bacterialgenome defense?arrow_forward
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