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There are approximately 4000 DNA sites in the yeast genome which could potentially bind the yeast transcription factor GAL4, but only 10 sites control genes necessary for galactose metabolism.
In one chromatin immunoprecipitation experiment, yeast growing on galactose were lysed, and subjected to cross-linking reagents which cross-linked transcription factors to DNA. Next the DNA was sheared into small fragments, and antibodies to GAL4 were added. These antibodies coprecipitated the GAL4 and the DNA it was cross-linked to. The cross-linking was then chemically reversed, and the DNA was isolated and sequenced. Results showed that only 10 of the possible 4000 sites had GAL4 bound.
What eukaryotic gene control strategies would allow GAL4 to bind to the 10 sites and not bind to the 3990 other sites?
Based on its structure, explain how the synaptonemal complex could actually represent an obstacle to recombination.
What type of inhibition malonate will produce on the enzyme succinic dehydrogenase?
What is the key difference between Mendel's principle of segregation and independent assortment?
According to ABC model of floral development, which genes would be expressed in a showy ornamental flower with multiple sepals and petals but no stamens or carpels.
A sunflower population in Hardy-Weinberg equilibrium has the given allele frequencies for petal color: 0.75 dominant, 0.25 recessive.
The DNA molecule is made up of two strands each of which is a sequence of sugar and phosphate molecules linked by covalent bonds.
What would be the limiting factor for ATP production by glycolysis in a strenuously-exercising muscle that lacks lactate dehydrogenase?
Complete the Punnett squares for a cross between the male with blood type B and a female with blood type AB. Build two Punnett squares and answer the following given questions about them.
Both parents have normal color vision. Where did the nondisjunction occur that gave rise to the young man with klinefelter syndrome?
Circle DNA or RNA
Identify a plant or animal species in your neighborhood. How is it perfectly adapted to its environment?
Experiment 1: (Equal initial populations, competition, and resource densities) Set the initial population of both Brown and Blue Sparrows to 200; set competition for each species at 0.50; set resources densities for both insects and seeds at 100/m2...
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