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A student places beetroot cubes in sugar solutions 0M, 2M, 4M, 6M and 8M for 30mins. When the data was graphed, it appeared that there was no percent gain or loss in mass for the beetroot cube put in the 6M sugar solution.
a) Draw a graph showing the kind of curves the student must have obtained for each solution, to come to this conclusion.
b) Explain what is going on at the cellular level? Use appropriate terms (water potential and tonicity) in your explanation.
What is involved in going from genomic DNA to messenger RNA (mRNA)? The transciption process involves the concerted action of several proteins called transcription factors which method the DNA in a multi-step process into mRNA.
The immune system is highly effective at preventing inappropriate activation. What safe guards are in place to prevent inappropriate activation of T cells? B cells? Thorough response only please.
The binding of an allosteric inhibitor to an enzyme causes the rate of product formation by the enzyme to decrease. Which of the following best explains why this decrease occurs?
What does narrow sense heritability (h2) estimate? a. The proportion of phenotypic variation that is due to total genetic variance b. The proportion of phenotypic variation that is due to interactive variance.
Assume you isolate a mutant e.coli strain that is unable to grow without tryptophan supplementation at 37 degrees C but grows normally at 25 degrees C.
Suppose if a prothallus is seperated in distance from other gametophytes, it will eventually produce both archegonia and antheridia.
If the preclinical prevalence of breast cancer increased in the screened population would you expect the positive predictive value to increase, decrease or remain unaltered? Why?
The doctor writes an order for 125 mg of a medication. The label on the vial states "50 mg per ml". How many ml should the nurse administer?
Assume if you start a meal through eating a high fat slice of cake or ice cream, it could slow down the emptying of your stomach contents into your intestine.
Dry yeast was mixed in water one hour before lab started. You mixed the yeast slurry with either water or a sucrose solution and placed the mixture in a fermentation tube at the start of lab.
Artificial electron acceptors can also be used to notice a specific organelle in animal cells by cytochemistry. Name this organelle and outline a procedure that you will use to detect this organelle by cytochemistry.
Make a table describing types of membrane transport. Provide examples when it is used.
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