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Motor proteins use the energy in ATP to transport organelles, rearrange elemts of cytoskeleton during cell migration, and move chromosomes during cell division. Which of the following mechanisms is sufficient to ensure the unidirectional movement of a motor protein along its substrate? a. a conformational change is couple to the […]

Niremberg used the enzyme polynucleotide phosphorylase to assembleRNAs with random sequences in the absence of a template. Supposethey added the enzyme to a solution of 90%CTP and 10%UTP, and thenused a cell-free system of protein synthesis to make peptidesaccording to the sequences in their synthetic RNAs. a.) Which amino acids […]

In each case, answer the questions at the end of the case and give researched references to support your assertions; also, explain what would be the ethical course of action and the legal requirements for action in the case. Case One Mary Stokes is in need of a kidney transplant, […]

1. Angiosperms put an enormous amount of energy into their fruits and flowers. Why? And why has this approach been so successful? 2. Describe the concept of physiological homeostasis and illustrate it with one three examples from human organ systems. 3. Discuss the various sources of human stem cells, their […]