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Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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...is impossible without..., and... . To imagine of......is a .... Plz fill up and provide short explanation?
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Honey bee workers from a colony in North Carolina are visiting two food sites, A and B, at 6 am as shown below. Site A is 1500 m from the hive; site B is 300 m from the hive. Which of the following statements is true regarding the genetic basis of the bees’ ability to track the passage of time and compensate for the movement of the sun? a. The bees’ clock mechanism is based on the Amfor gene, which causes a build up of AMFOR protein in the corpora pedunculata that activates the Gp9 and UU genes, whose products degrade AMFOR in a 24 hour cycle. b. The bees’ clock mechanism is based on the per gene in the optic lobes, whose activity has a 24 hour cycle regulated by the dbt and tim genes. c. The bees’ clock mechanism is based on alternating expression of two alleles for the for gene in the subesophagael ganglion: the R allele which is active at night and the s allele which is active during the day. d. The bees’ clock mechanism is based on levels of eclosion hormone released from…
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These results show how many cells of each type of yeast showed mating structures after being exposed to three different yeast mating pheromones. For each yeast cell type, a group of 1000 cells were given the Wild Type-created pheromone. Then, another group of 1000 cells were given the Variant 1-created pheromone, and then another group of 1000 cells were given Variant 2-created pheromone. The same concentration of pheromone was given to each group. After 48 hours, the cells were observed. Cells that had differentiated by showing mating structures were counted. A) Identify a signaling molecule from the model presented. Explain how receptors play a role in cell differentiation. B) Identify the dependent variable and two controls the experimenters used when conducting this experiment. C) Evaluate if the number of Variant 1-Type cells with mating projections was significantly different from those of the Wild Type. Use chi-square analysis. D) Scientists propose that a mutation has occurred…
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GIVE ANSWER DISCUSS THE SOURCE OF THE INPUTS (WHERE DO THEY COME FROM) AND WHAT OCCURS WITH THE OUTPUTS (WHERE DO THEY GO?