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You are given a sequence of 6000 mRNA bases (mature mRNA without introns) and told that this sequence encodes an ion channel.
In a population of desert bighorn sheep, a mutant recessive allele c has been found to cause curled coats in both males and females. The normal dominant allele Cproduces straight coats. The frequenc
If the initial allele frequencies are p = 0.75 and q =0.25 and the a allele is a lethal recessive, what will be the frequency of the a allele in the future?
Calculate the equilibrium potential for K+ (Ek) if its extracellular concentration rises from 5mM to 10mM. Comparing this to the normal Ek, is the change a depolarization or hyperpolarization?
Suppose a semipermeable membrane separates two solutions. One solution has 0.72g glucose to 1.0L of water; the other has 0.117g NaCl to 1.0 L of water.
Emisolid media for motility determination uses a lower percentage of agar compared to solid media.
A woman heterozygous for the X-linked allele that causes for Duchenne muscular dystrophy has children with a man with a normal allele.
Hemophilia is an X-linked recessive trait in humans. If a heterozygous woman has children with an unaffected man,
Which blood phenotypes (A, B, AB, and O) can be attributed to a single genotype?
A group of Ethiopians were assayed for CCR5-del32 deletion polymorphism. 247 were +/+, 69 were +/del32, and 11 were del32/del32.
A zoologist is investigating a population of squirrels whose coat color is controlled by a single gene whose two alleles (B1 & B2) are codominant. B1B1 individuals are black, B1B2 individuals ar
Assuming no interference between the regions, if the parental plant is crossed with the a b c/a b c plant, how many progeny will have the phenotype of A B c if there are 1000 total progeny
I am puzzled about whether the TF only binds to DNA in the initiation stage of transcription and will detach during transcription. (I am thinking if the TF bind to the sense strand, it will block th
I was under the impression that if a cell doesn't have active transport, it either would lose molecules through the membrane and not be able to maintain a proper gradient, or molecules would be trap
This patient's presynaptic neuron (nerve) action potentials and conduction velocities are normal. New information: With repeated stimulation of the efferent nerve to the arm and hand, the neuron ac
What decides whether an activated B cell will get converted to plasma cell
As far as we know Ape Men or the Neanderthal Man was the first to bury its dead.
I always wonder about the capability of diversity of our antibodies.
I would like to learn about how the process of cloning works in nature - how are twins "created" after fertilization what genetic changes can occur in each of the twins.
I was watching a lecture by Richard Dawkins earlier today and he mentioned that "Your 185th million grandfather was a fish." I started wondering about the following question,
I believe The reason for autophagy is some kind of recycling, am I right? But why does it occur in infections
The calcium gradient should also be free, -2-6 mmol/l, in the lumen to allow diffusional calcium absorption from the interstitial space. Similarly, free calcium concentration in the extracellular f
We often see videos of octopuses and chameleons changing their color to suit their surroundings. If it was a simple color change from white to red, it'd be understandable, but some of these animals
The thing is, we are absolutely infested by them. They seem to be more active at dawn and dusk (like mosquitoes) but we have dozens flying around the house every evening. I would like to know the sp
The most distinctive characteristic of a human is it's face - it is unique among each individual (with the exception of identical twins). It is uncertain to me if whether we best identify other huma