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Summarize the roles cell walls and vacuoles play in regulating plant form by describing: how cell walls limit plant cell growth; how walls and vacuoles act to maximize plant contact with the environment. To do this, begin by describing the structural features of cell walls and telling why contact with the environment is both a favorable and risky prospect for plants; then explain the quantitative basis for maximizing environmental contact.
Assume the two tryptophan codons within the leader peptide of the trp operon were changed from tryptophan to asparagine.
Ed Rivers, a 3rd year medical student, was alone in the hospital ER one night. It was unusually quiet that night, and the resident was getting some much needed sleep.
A scientist has studied the community of insects on these islands and determined that the z-slope for them is 0.26. If island A is 420 ha and has 1450 species of insects, how many species of insects would be expected on island D which is 24ha?
determine the dominant and recessive expression of the gene?
Examples of positive and negative control of transcription can be found in the regulation of expression of the bacterial operons lac and trp. Use these two operon systems to describe the difference between positive and negative regulation.
Water snakes are common in the area around Lake Erie. They live on the mainland as well as islands in the lake. The island and mainland populations are relatively isolated, but migration does occur.
Different enzymes have different optimal temperature and pH requirements.
A man makes 0 units of an enzyme due to homozygous recessive genes on chromosome 21. His wife makes 100 units of the enzyme due to a heterozygous pair of genes on chromosome 21. They have a son with trisomy 21 who makes 200 units of the enzyme.
An SDS-PAGE gel is run of proinsulin and insulin.Samples were treated with beta-mercaptoethanol prior to electrophoresis.Draw a picture of the predicted results.
Reach capabilities in the sagittal plane can be determined graphically using anthropometric data as shown in the figure on the given page.
Describe the process of muscle contraction. Includea description of the sarcomere structure and what happens to itduring muscle contraction and relaxation
A particular species of mouse feeds on the seeds of a single species of cherry tree. When the mice eat a seed, they digest it completely.
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