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A south fransisco child enjoyed bath time at his home because of the colorful orange and red water. The water did not have this rusty color at its source, and the water department could not culture the thiobacillus bacteria responsible for the rusty color from the source. How ere the bacteria getting into the household water? What bacterial structures make this possible?
Diagram an angiosperm seed. Identify the tissue or cell that each part is derived from. Distinguish between diotyledonous and monocotyledonous seeds; albuminous and exalbuminous seeds. Explain what happens in ripening and after-ripening.
A lacI+ lacO+ lacZ+ lacY+ Hfr strain is mated with an F- lacI- lacO+ lacZ- lacY- strain. In the absence of any inducer in the medium, beta-galactosidase is made for a short time after the lac region has been transferred. Explain why it is made and..
How would you expect the lagging strand DNA from the two mutant strains to be similar and how would they differ from each other?
A double-stranded fragment of viral DNA, one of whose strands is shown below, encodes two polypeptides called vir-1 and vir-2. Adding this double stranded DNA fragment to an in vitro transcription and translation system yields peptides of 10 residues
Phenylalanine medium sometimes is prepared in broth form with a pH indicator similar to that used in Decarboxylase Medium so that increases in pH then can be detected by development of purple color. When testing an organism for the ability to deam..
Suppose that you are member of a marine biology team seeking to catalogue the organisms inhabiting a threatened coral reef. The team has found two new seaweeds,
In this week's experiment, we will examine the technique of random sampling as a tool for the estimation of large populations.
What is pleiotropy? If two traits are practically always inherited together, is pleiotropy the only possible explanation? Are there any other possibilities? How can you distinguish between pleiotropy and linkage between two genes?
Describe the different steps of a growth curve for microbes, and what factors influence each step. Explain in 100+ words.
If a male dog is black: (B) and a female is white (bb). Draw a Punnett square to predict the color of the puppies. (Remember black can be BB or Bb.) So draw the first square where the father is BB and the mother is bb.
Be able to make a sketch and narrate how transcription proceeds, using the following words (more or less in order of appearance): Promoter region, RNA polymerase, template strand, coding strand, GC hairpin. Be sure to explicitly state how hydrogen..
A double heterozygote has the coupling configuration of A B/ a b of two linked genes that have a frequency of recombination of 0.20. If a randomly chosen gamete carries A, what is the probability that is also carries B?
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