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In the table below, predict (yes or no) whether or not the E. coli lac operon will be transcriptionally active in the presence or absence of glucose or lactose as indicated and respond
Lactose Glucose Lac expression?
No YesYes YesYes No
to questions "a" and "b."
a. Explain each of your answers in terms of the molecular mechanisms that are known to underlie the regulation of the lac operon.
b. Which mechanism is considered to be negative control and which is considered to be positive control? Explain.
When you cut into an apple and expose the white fruit to air soon turns brown. this is know as enzymatic browning . you can prevent the browning by adding acidic lemon or orange juice to a cut apple. explain the phenomenan using your knowledge of en..
Women born with an extra X chromosome (XXX) are healthy and phenotypically indistinguishable from normal XX women. What is a likely explanation for this finding? How could you test this explanation?
Imagine a rabbit. A conejo. Its coat color is controlled by several loci, among them the C locus. C has several alleles; three of them are: C = full color ("chestnut agouti"), cch = chinchilla; c = albino. C is dominant to cch or c; cch is dominan..
What is the acid-base imbalance Shauna might have experienced and its etiology? What are the functions and importance of the bicarbonate buffer system in the body
There is a compound that resembles thymidine, but once incorporated into the chromosome blocks any more nucleotides from being added.
Certain unscrupulous operators offer, for a fee, to freeze recently deceased individuals in liquid nitrogen until medical science can cure the disease from which they died. What is the biochemical fallacy of this process.
create a written plan of no more than 350 words of how you will complete the natural resources and energy team paper
A given gene (Gene X) is repressed in the blood cell lineage of mice, how you might test how this particular gene is repressed in this cellline
What is a fitness function? Describe how you can use a fitness function to: 1) determine whether an allele is dominant, co-dominant, or recessive AND beneficial, deleterious, neutral, or experiencing some other form of selection, and 2) predict th..
A manufacturing plant is seeking to mix wood chips with corn stover to fire a boiler. The mixture has a target energy content of 18.8 MJ/kg.
Lactate threshold is commonly used as a training tool in determining the appropriate intensity for training. Discuss the value of using lactate threshold as a method of monitoring training intensity.
Eukaryotic cells may divide through the process of mitosis or meiosis. In humans, mitosis generates new cells for growth and repair.
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