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Consider the following mutations in the indicated genes of the lac operon. Given the growth conditions listed, predict the relative rate of transcription of the operon in each case. Answer OFF or ON, and if you answer ON, say if the transcription rate would be LOW, or HIGH, as appropriate.Case Mutation: Lactose Glucose Rate of lac mRNA transcriptionA Is, Oc absent high ?B I–d , PDE– absent high ?C Oc, AC– present low ?D I–, CAP–, PDE– absent low ?E Is, CAP–, AC– present high ?Mutant definitions (null mutation means that no product of the gene is made):I– = repressor minus (null mutation)I–d = cannot bind to operatorIs = super-repressor (cannot bind to inducer)Oc = operator constitutiveCAP– = catabolite activator protein minus (null mutation)AC– = adenylate cyclase minus (null mutation)PDE– = cAMP phosphodiesterase minus (null mutation)
define how the rate of many enzyme catalyzed reactions varies with pH. What types of amino acids must be at the active site of an enzyme if its rate decreases at high pH.
a girl developed generalized seizures. a ct scan revealed a single brain lesion consistent with a tumor. biopsy of the
What tissue is responsible for conducting water? what tissue is responsible for conducting photosynthates?
Address the concepts: central dogma, post-translational modifications/ conformational changes, cell cycle, and genetics.
Discuss and explain the dependent and independent variables in the water quality vs. fish population experiment?
Assume that the glycerol phosphate and pyruvat shuttle are working at their costs, there is ample ADP and Pi in the mitochandrion. Include both mitochandrial ATP and an active, reversible nucleoside diphosphokinase.
Colchicine causes disassembly of microtubules. What result (if any) may you see on a giant algal cell in which cytoplasmic streaming is occurring.
1. Hypothesize why some substances were not metabolized, while others were. Research the chemical formula of Equal and Splenda and explain how it would affect respiration.
Describe the type of genetic defect that causes this disease (Ex. Base deletion, base addition, base substitution, frame shift, non-disjunction, etc).
1 describe the demographic transition model and how it was developed by demographers.2 describe the 4 phases of
q1. what about while the habitat is not within the u.s. borders? many international conservation groups are working to
Consider what you have learned about the telomeres found at the ends of eukaryotic chromosomes and answer the following questions.
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