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A paricular operonencodes enzymes that together manufacture an essential amino acid.If the regulation of this operon is like that of the trp operonthen?a. the amino acid acts as a corepressor.b. the enzymes produced are called inducible enzymes.c. the amino acid turns on enzyme synthesisd. the amino acid inactivates the repressore. the repressor binds to the operator in the absence of the aminoacid.
What is the probability that two grandchildren of the woman who are first cousins to one another will each inherit the dominant allele?
Which statement is not true about the menstrual cycle?
Describe the different growth habits of Cladophora,Ulva, and Codium. Discuss some of the features that distinguish phylum Anthocerophyta from phylum Hepatophyta.
You are seeking a pure preparation of a newly discovered enzyme, Xase, for further study. The assay for Xase has just been worked out, and you have a preparation of cells rich in this enzyme. Given the required equipment and supplies, how would yo..
A wild cherry tree has 5 pairs of chromosomes in its nucleus found in a cell in the vascular cambium. What is the number of chromosomes and the number of linear DNA strands during the G2 stage cell cycle?
How does bacterial, archaeal and eukaryotic transcription occur? How are they similar and different in terms of process and components? When do we say that a virus is dead or destroyed ?
Why are heavy metals such as lead, uranium, platinum and gold particles used in electron microscopy and why can't fluorochromes be used instead?
A flower breeder analyzed that a cross between true-breeding red tulips and true-breeding white tulips makes all red-flowering F1 offspring.
What are satellite colonies? Why can satellite colonies be formed? If you use an antibiotics such as tetracycline, will you even get satellite colonies and why?
What would happen to respiration if we add a buffer or base to the external environment of the bacteria? (assume bacteria is in a closed environment like a tube) How would this affect the mechanism of respiration?
The A species of long day plant will flower when the days are over fourteen hours long. The plant is given a daily cycle of nine hours of light followed by three periods.
in the plant genus triticum there are many different polyploid species as well as diploid species. crosses were made
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