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Recent experiments in a lab have focused on trying to understand cellular mechanisms that underlie epilepsy. Many of the studies involve recording electrical activity in neurons from brains of adult fruit flies (Drosophila). Brains in all animals are made up of a collection of highly specialized cells surrounded by fluid. In humans and other mammals the fluid surrounding the brain is called cerebrospinal fluid (CSF). This contains lots of molecules including sodium, K+, glucose and proteins with a total solute concentration of ~300 milliosmols (mOsm). In fruit flies the brains are surrounded by fluid called hemolymph with a total solute concentration of ~250 mOsm.To record from neurons we dissect the brain out of the fruit fly head. The brain tissue is placed immediately into a solution. When we make this solution what should the total solute concentration be and why?
Estimate how many photons of light are minimally required to build one glucose molecule in photosynthesis and describe your answer
In cocker spaniels, solid coat color is dominant over spotted coat. Suppose a true-breeding, solid-colored dog is crossed with a spotted dog, and the F1 dogs are interbred.
A child is suspected of having an eating disorder. What hormones require to be assessed prior to considering that the situation is primarily psychological?
A population of fifty-thousand around a nuclear facility receives an average wholebody dose of 0.5 rad as a result of an accidental release of radionuclides.
How does real time PCR work to quantify the initial amount of the DNA template? How should the method be modified to quantify the initial amount of RNA template extracted from tissue or cells?
Explain the differences in population growth patterns of the two paramecium species. What does this tell you about how Paramecium aurelia uses available resources.
The Heliconius butterflies are a classic example of Müllerian mimicry. Which of the following defines a pair of species exhibiting Müllerian mimicry and which of the following defines an obligate mutualistic relationship
How would this method result in purification of tubulin.
The delta G for hydrolysis of the amide group from glutamine is -14.2 kJ/mol at 25C. Compute the keq' for this hydrolysis.
All through other periods of time, Tony seems very "down." throughout these times he does not take care of himself. He seems to want to sleep all the time, and he often makes thinly veiled references to wanting to commit suicide.
In a series of experiments, genes that code for mutant forms of a receptor tyrosine kinase are introduced into cells. The cells also express their own normal form of the receptor from their normal gene.
Over the long period of time that life has existed on Earth, there have been number of important or significant innovations including endosymbiosis to create mitochondria and chloroplasts.
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