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1. A study by Morgan and coworkers used genetically modified white blood cells to treat patients with melanoma who had not responded to standard treatments. In patients in whom the cells were cultured ex vivo for an extended period of time (cohort 1), the cell doubling times were {8.7, 11.9, 10.0} days. In a second group of patients in whom the cells were cultured a shorter period of time (cohort 2), the cell doubling times were {1.4, 1.0, 1.3, 1.0, 1.3, 2.0, 0.6, 0.8, 0.7, 0.9, 1.9} days. In a third group of patients (cohort 3), actively dividing cells were generated by performing a second rapid expansion via active cell transfer. Cell doubling times for cohort 3 were {0.9, 3.3, 1.2, 1.1} days. Calculate the mean and standard deviation within each group.
1. The duck-billed platypus and other monotremes differ from other mammals in that they? a. are aquatic. b. have mammary glands. c. lay eggs. d. have hair.
Describe the mechanisms used by transposable elements to move between DNA molecules (cut and paste, replicative, retrotransposable elements)?
Use the Central Dogma to explain the term "cotranslational" and "post-translational" processing.
Explain the three hypotheses of cell life-shortening. Which hypotheses are affected by radiation? What are the three stages of water radiolysis? What happens in each stage? What is the difference between direct and indirect energy transfer?
Describe two important factors that contribute to the buildup of CO2 in the atmosphere and contribute to global warming. Discuss possible ways to control these factors.
explain the embryological development of segmental duplicate colon in the manx.
Draw the tRNA molecules that will be used in the translation of the gene. "stick figures" are acceptable.
It is theorized that the chronic internal exposure to the radioactivity contained in the paint caused DNA damage that may have affected Damage checkpoints in the cell cycle, driving the cell to multiply much more rapidly than normal.
Define "trophic levels". Provide a specific example of four species and describe their trophic-level relationships. Trace energy flow through your sample community.
Provide an example (includestructures) of a b-adrenergic receptor agonist and a b-adrenergic receptor antagonist. Are the compounds useful clinically, whyor why not?
Because the genetic code is a universal code in biology, in general the nucleotide sequence of important genes is highly conserved across many different species of organisms. It is very common for 70% or more of the nucleotides in a gene to be conser..
which statement about protein structure is true.
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