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Which of the following is not true about introns?
a. variable intron splicing can lead to variability in polypeptide sequence
b. introns accumulate mutations faster than coding regions in a chromosome
c. not all eukaryotic genes contain introns
d. all of these are true
Place the following characters on a phylogeny of fungi (with animals as an outgroup), Flagella, Multicellularity, Non-motile sperm, Arbuscular mycorrhizae, Macroscopic reproductive structures.
In most biology experiments the relationship between the independent and the dependent variable can be best described as cause and effect. Describe.
Determine what kind of receptores are norepinephrine, epinephrine and phenylephrine? Are they slective or non-selective, alpha 1 or 2, beta 1 or 2.
Assume you treated butter with a fatty acid desaturase, an enzyme that removes hydrogen from fatty acids and creates double bonds.
Considering the pathology of a cytokine storm, select possible strategies that would be likely to diminish the harmful effects of superantigen toxins.
What percent of the population are homozygous dominant. What do you assume would be the effect on the switch of reversing orientation of one of the hix sites.
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.
You are a scientist working on a large protein (500 amino acids long) you have genetically engineered the protein in in such a way as to replace a single hydrophobic amino acid with a negatively charged amino acid.give the difference between prima..
Turned on or off genes can be passed on to future generations in mice.
What molecular evidence do scientists have that all life is at least distantly related and has a common ancestor? What six elements are most prevalent in living organisms?
What do the proteoglycan and collagen components of cartilage contribute to connective tissue? Explain the mechanical reason the gel-like aggregates of proteoglycan are important to the knee.
Explain how temperature affects the hemoglobin saturation curve. Discuss how does temperature affect the delivery of oxygen to the tissues?
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