• Biochemistry Question?

    10. Arginine: a) Draw the complete structure of the amino acid arginine in the form present at neutral pH. b) The pKa of the carboxyl group is 2.1, the amino group is 9.6, and the R-group is 12.5. Draw the form that would predominate at pH 9.8. c) On your structure in part b, carefully circle the atoms that can participate in hydrogen bonds when... show more
    10. Arginine: a) Draw the complete structure of the amino acid arginine in the form present at neutral pH. b) The pKa of the carboxyl group is 2.1, the amino group is 9.6, and the R-group is 12.5. Draw the form that would predominate at pH 9.8. c) On your structure in part b, carefully circle the atoms that can participate in hydrogen bonds when part of a peptide. d) Calculate the net charge of free arginine at pH 9.8. Show all of your work.
    1 answer · Chemistry · 12 months ago
  • Alternative Splicing Question?

    A gene contains three exons of 600bp, 30bp, and 270bp. This gene codes for two different proteins, one that is 300 amino acids long, and a second that is 290 amino acids long. Propose a model of alternative splicing for this gene that can account for these facts.
    A gene contains three exons of 600bp, 30bp, and 270bp. This gene codes for two different proteins, one that is 300 amino acids long, and a second that is 290 amino acids long. Propose a model of alternative splicing for this gene that can account for these facts.
    1 answer · Biology · 1 year ago
  • Physics Help?

    A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +23.0 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +11.0 revolutions. How much time does it take for the bike to come to rest? What is the angular acceleration of each wheel?
    A person is riding a bicycle, the wheels of a bicycle have an angular velocity of +23.0 rad/s. Then, the brakes are applied. In coming to rest, each wheel makes an angular displacement of +11.0 revolutions. How much time does it take for the bike to come to rest? What is the angular acceleration of each wheel?
    1 answer · Physics · 1 year ago
  • How could you use HNMR to tell if your final product was contaminated with unreacted 1-indanone?

    The final product is 2-(3,4-dimethoxybenzylidene)indan-1-one
    The final product is 2-(3,4-dimethoxybenzylidene)indan-1-one
    1 answer · Chemistry · 2 years ago
  • Grignard Reaction of Mg + Bromobenzene to create triphenylmethanol?

    Ethoxytriphenylmethane is one possible by-product from this reaction. How and when might this by-product form? Write an equation and give a mechanism for this reaction.
    Ethoxytriphenylmethane is one possible by-product from this reaction. How and when might this by-product form? Write an equation and give a mechanism for this reaction.
    1 answer · Chemistry · 2 years ago
  • Genetics Help?

    Assume the height of an individual is determined by four unlinked loci with two alleles at each locus, where one allele at each locus increases height (+allele) and one allele decreases height (-allele). How many different heights are possible among the offspring of parents who are both heterozygous for + and - alleles at all four loci? Can... show more
    Assume the height of an individual is determined by four unlinked loci with two alleles at each locus, where one allele at each locus increases height (+allele) and one allele decreases height (-allele). How many different heights are possible among the offspring of parents who are both heterozygous for + and - alleles at all four loci? Can individuals with intermediate height produce offspring that are much shorter or taller than their parents? How or why not?
    2 answers · Biology · 2 years ago
  • Physics HELP?

    A diver springs upward from a diving board. At the instant she contacts the water, her speed is 8.70 m/s, and her body is extended at an angle of 79.0° with respect to the horizontal surface of the water. At this instant her vertical displacement is −3.00 m, where downward is the negative direction. Determine her initial velocity, both magnitude and... show more
    A diver springs upward from a diving board. At the instant she contacts the water, her speed is 8.70 m/s, and her body is extended at an angle of 79.0° with respect to the horizontal surface of the water. At this instant her vertical displacement is −3.00 m, where downward is the negative direction. Determine her initial velocity, both magnitude and direction.
    1 answer · Physics · 2 years ago
  • Diels-Alder Reaction?

    Two constitutional isomers of molecular formula C8H12O are formed in the following reaction. Ignoring stereochemistry, suggest a reasonable structure for one of these Diels-Alder adducts. http://www.chegg.com/homework-help/two-c...
    Two constitutional isomers of molecular formula C8H12O are formed in the following reaction. Ignoring stereochemistry, suggest a reasonable structure for one of these Diels-Alder adducts. http://www.chegg.com/homework-help/two-c...
    1 answer · Chemistry · 2 years ago
  • Draw the structural formula for the conjugated diene that gives 2,4−dimethylpentane on catalytic hydrogenation.?

    Draw the structural formula for the conjugated diene that gives 2,4−dimethylpentane on catalytic hydrogenation.
    Draw the structural formula for the conjugated diene that gives 2,4−dimethylpentane on catalytic hydrogenation.
    1 answer · Chemistry · 2 years ago
  • ORGANIC CHEMISTRY HELP!!! URGENT!?

    A scientist placed a racemic mixture of tartaric acid in a beaker and later found it was growing moldy. He filtered off the mold and found the solution now rotated the plane of polarized light. The mixture did not rotate the plane of polarized light before. How had the mold changed the solution to become optically active?
    A scientist placed a racemic mixture of tartaric acid in a beaker and later found it was growing moldy. He filtered off the mold and found the solution now rotated the plane of polarized light. The mixture did not rotate the plane of polarized light before. How had the mold changed the solution to become optically active?
    1 answer · Chemistry · 2 years ago
  • Integral Problem HELP!!!?

    For each of the following, determine if substitution can be used to evaluate the integral. If so, fill in the substitution variable w and the value of the integral; if not, enter na for both w and the antiderivative. ∫x^5e^x^4dx= ∫x^5sin(x^4)dx= ∫sin(x)/9+cos(x)dx= ∫x^4e^x^5dx= For each of these, please say what the integral evaluates to and what w=.
    For each of the following, determine if substitution can be used to evaluate the integral. If so, fill in the substitution variable w and the value of the integral; if not, enter na for both w and the antiderivative. ∫x^5e^x^4dx= ∫x^5sin(x^4)dx= ∫sin(x)/9+cos(x)dx= ∫x^4e^x^5dx= For each of these, please say what the integral evaluates to and what w=.
    1 answer · Mathematics · 2 years ago
  • Integral Problem HELP!?!?!?

    Suppose that ∫ (b=1 a=0) f(t)dt=3. Calculate each of the following. ∫(b=0.25 a=0) f(4t)dt = ∫(b=0.25 a=0) f(1-4t)dt = ∫(b=0.25 a=0.125) f(2-8t)dt =
    Suppose that ∫ (b=1 a=0) f(t)dt=3. Calculate each of the following. ∫(b=0.25 a=0) f(4t)dt = ∫(b=0.25 a=0) f(1-4t)dt = ∫(b=0.25 a=0.125) f(2-8t)dt =
    1 answer · Mathematics · 2 years ago
  • Finding velocity/speed using given information?

    A cat, walking along the window ledge of a New York apartment, knocks off a flower pot, which falls to the street 280 feet below. How fast is the flower pot traveling when it hits the street? (Give your answer in ft/s and in mi/hr, given that the acceleration due to gravity is 32 ft/s2 and 1 ft/s = 15/22 mi/hr.) speed in ft/s = speed in mi/hr =
    A cat, walking along the window ledge of a New York apartment, knocks off a flower pot, which falls to the street 280 feet below. How fast is the flower pot traveling when it hits the street? (Give your answer in ft/s and in mi/hr, given that the acceleration due to gravity is 32 ft/s2 and 1 ft/s = 15/22 mi/hr.) speed in ft/s = speed in mi/hr =
    1 answer · Mathematics · 2 years ago
  • Parametric Equation Help??

    Find parametric equations for the tangent line at t=3 for the motion of a particle given by x(t)=6t^2, y(t)=7t^3. For the line... x(t)= y(t)=
    Find parametric equations for the tangent line at t=3 for the motion of a particle given by x(t)=6t^2, y(t)=7t^3. For the line... x(t)= y(t)=
    1 answer · Mathematics · 2 years ago