Blue-light absorption triggers photoreceptor activation, in case of cryptochromes light absorption by the

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#Question id: 2198

#Unit 2. Cellular Organization

The cell in number (15) above would be in an environment that was:

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#Question id: 15653

#Unit 13. Methods in Biology

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium. You have isolated a mutation that causes constitutive melibiase activity, which you designate MelA–. P1 phage mapping experiments using a Tn5 insertion linked to Mel1 show that MelA– is not linked to Mel1. Moreover you find that when an amber suppressor is introduced into a MelA– mutant, normal melibiase regulation is restored. Classify the MelA– mutation on the basis of genetic properties,  make a proposal for the type of regulatory functions affected by the MelA– mutation?

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#Question id: 5826

#Unit 8. Inheritance Biology

____ is a disease that causes progressive neurological degeneration that progresses to mental retardation and general loss of body function.

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#Question id: 11675

#Unit 7. System Physiology – Animal

Processing of filtrate in the proximal and distal tubules:

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#Question id: 3390

#Unit 11. Evolution and Behavior

The average numbers of offspring produced by three genotypes are: GG = 60; Gg = 30, gg = 20. What is the selection coefficient of gg?