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A scientist clones a regulatory gene that is involved in controlling the expression of other genes, and discovers that the regulatory gene encodes a histone deacetylase enzyme. It is likely that this enzyme regulates gene expression by:
A.Causing tighter packing of the chromatin at the target gene, thereby inhibiting transcription B.Causing looser packing of the chromatin at the target gene thereby inhibiting transcription C.Causing tighter packing of the chromatin at the target gene, thereby enhancing transcription D.Causing looser packing of the chromatin at the target gene, thereby enhancing transcription E.Causing tighter packing of the chromatin at the target gene, thereby inhibiting translation.
Describe the difference between isotonic and isometric contractions. What differences did you notice between the spongy and compact bone?
A corn plant is homozygous for a mutant allele that results in no pigment in the seed. The mutant is caused through Ds insertion that often exits late in the seed development,
Discuss the three components of a circulatory system. Cardiovascular diseases account for more than percent of deaths in the US.
What type of promoters are found in the T-DNA that control oncogenes and opine synthesis genes? What is the basis for tumor formation in the Agrobacterium-plant? What causes the tumor to form? What products of the bacteria are needed to cause plan..
For which of the following types of microbes would a microbiologist use culture techniques for living host cells? a.) capnophiles b.)normal skin bacteria c.)Campylobacteria sp. d.) obligate intracellular organisms, such as chlamydia and viruses
Perform a BLAST search and a result has an E value of about 1 x 10-4. What does this E value mean? What are some parameters on which an E value depends?
Describe why biological information of amino acid sequences in proteins is encoded in codons composed of 3 nucleotides and NOT 2 nucleotides.
A two electron transfer reaction you are studying has a standard state standard reduction potential (Eo') on 0.137V at 37C. What is the equilibrium constant for the reaction (Keq') at 37C.
A middle-aged man comes in since he has noticed multiple small, blood-red, raised lesions over his anterior chest and abdomen for past numerous months. They are not painful and he has not known about any bleeding or bruising. He is concerned this mig..
Suppose that you perform fruit fly crosses with different pairs of 3-X-linked traits specified by genes x, y, and z. You observe the following frequencies of recombinant
What is the driving force for this movement of gas (think concentraction gradient)? Finally, how does carbon monoxide disrupt the process of oxygen trans port?
Diglycerol tetraether membrane lipids can be found in many archaeal species. The extreme thermophiles contain almost exclusively this type of lipids in their membrane while the percentage of this type of lipids is much lower in the membrane of met..
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