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Cell A secretes Substance M. Substance M travels via the blood and reaches cell B. Substance M binds to a receptor on the surface of cell B. Cell B responds by increasing its production and release of Substance N. what type of chemical messenger is Substance M? a. paracrine b. messenger of direct communication (MDC) c. hormone d. neurotransmitter e. not enough information is given to answer the question.
Use Figure 1 and 9C in the paper by Carr & Konishi, calculate the conduction velocities for the ipsilateral and contralateral axons from the nucleus magnocellularis within nucleus laminaris.
Using light microscopy you examine the soil samples and the goo from the degraded polyurethane. Will this approach allow you to observe all microorganisms present in the sample ? why or why not ? What are the limitations of this approach?
Assume if the DNA in one of your skin cells were to change, which cells that are you would inherit that change?
One way of expressing rate at which enzyme can catalyze a reaction is to give turnover number. The turnover number is maximum number of substrate molecules that can be acted on one molecule of enzyme per unit of time.
A recessive allele on the X chromosome is responsible for red-green color blindness in humans. A woman with normal vision whose father is color-blind marries a color-blind male. What is the probability that the couple will have a color-blind offsp..
The flipping of Phe rings requires that groups surrounding the ring move aside momentarily. The rate of ring flipping can be measured using NMR.
In the apoptosis pathway in C. elegans. What would be the difference in cell response between a cell that has a CED-9 mutation and a cell that has a CED-4 CED-9 double mutation? Explain why the difference is expected.
Find out the genotypes of the parents and their pups. Use Punnett Squares to demonstrate your answers. What did Mendel observe in the F2 offspring that showed him that alleles for seed shape segregate separately of those for seed colour.
Lipid rafts are specialized regions of the exoplasmic leaflet. GPI-anchored proteins are able to diffuse from the main (non-raft) area of the exoplasmic leaflet into a lipid raft and then back out into the main exoplasmic leaflet area. Which state..
What universal themes or concepts seem to underlie and govern the behavior of microorganisms, particularly the bacteria?
Activation of T cells requires that antigens be presented from antigen-presenting cells, not simply by exposure to the antigen in solution. What biological rationale may underlie this requirement - consider both from the perspective of how this can a..
If fifty microliters of anitbody enzyme solution with a concentration of 73 micrograms/ml is diluted with ten microliters of water.
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