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1. How do promoters differ in efficiency
2. How is the expression of the lac operon inhibited by the lac repressor?
3. Which two characteristics differentiate promoters from enhancers?
4. Name the 3 different eukaryotic RNA polymerases and describe the specific genes they transcribe.
5. What role do small nucleolar ribonucleoproteins (snoRNPs) play in RNA processing?
6. What is the amino acid error rate in protein synthesis? Is this rate logical in evolutionary terms of function?
7. What is the first step in the elongation cycle of protein synthesis?
8. Translation can be considered to have three phases or steps: initiation, protein synthesis, and termination. Please give a detailed summary of the factors and molecules involved with each step and, where appropriate, compare/contrast the differences between prokaryotic and eukaryotic translation.
Gypsum is a mineral, or natural substance that is a hydrate of calcium sulfate CaSO4. A 1.000g sample of gypsum contains 0.791g of CaSO4. How many moles of CaSO4 are there in this sample. Assuming that the rest of the sample is water, how many m..
How much heat (in kJ ) is required to warm 12.0 grams of ice, initially at -12.0 Celsius, to steam at 112.0 Celsius? The heat capacity of ice is 2.09 J/g*Celsius and that of steam is 2.01 J/g*Celsius?
Problem- The dissolution of barium hydroxide in water is an exothermic process. Which of the following statements is correct
Which elements with an atomic number greater then 40 can be expected to have chemical properties similar to those of the element Br and what is the periodicity of the two
The precipitate SnO2·4H2O was removed by filtration. The resulting filtrate and washings were diluted to a total volume of 250.0 mL. A 15.00 mL aliquot was buffered and titration of the lead, copper, and zinc required 35.78 mL 0.001500 M EDTA.
Determines the mass of an unknown gas to be .43 grams at 37 C as well as 720 mm Hg in a 250 mL container. Explain what is the molecular mass of the unknown gas. Use n=(PV/RT) but a little confused on where to proceed.
What will be the direction of the reaction when the reactants and products have the following concentrations; CS2=0.14M, Cl2=).18 M,CCl4=0.28 M, and S2Cl2=0.20 M
What is the limiting reactant in this experiment. The density of methyl salicylate is 1.18g/mL at 20degree C
Suppose that a transition-metal ion was in a lattice in which it was in contact with just two nearby anions, located on opposite sides of the metal. Diagram the splitting of the metal d orbitals that would result from such a crystal field Assuming..
The solubility of MX2 is 8.91e-07 M. What is its Ksp to three sig figs? What is the molar solubility of M2X (Ksp = 1.38e-10)? M What is the concentration of M1+ in a saturated solution of M2X? M
Consider the following statement: "For some molecules and ions, a Lewis structure that satisfies the octet rule does not lead to the lowest formal charges, and a Lewis structure that leads to the lowest formal charges does not satisfy the octet rule...
For each of the following species, draw its Lewis-dot structure. If the species exhibits resonance, draw all the resonance hybrids. For each species, tell its shape, bond angles, hybridization of the central atom, and whether it is polar or nonpola..
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