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Chemistry of Proteins and Hemoglobin

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"1. Protein A has a binding site for ligand X with a Kdof 10-6M. Protein B has a binding site for ligand X with a Kdof 10-9M. Which protein has the higher affinity for ligand X? 2. What is the effect of the following changes on the O2 affinity of hemoglobin? (a) A decrease in the blood pH from 7.4 to 7.2. (b) A decrease in the partial pressure of CO2in the lungs from 6 kPa (holding one's breath) to 2 kPa (normal). (c) An increase in the BPG level from 5 mM (normal altitudes) to 8 mM (high altitu
Radiocarbon Dating of Plants and Animals

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How many years will it take for carbon-14 to diminish to 1% of the original amount after the death of a plant or animal? Use the formula A=A0e(-0.000124t). Compute the answer to three signiﬁcant digits.
Specific Rotation of Alpha and Beta -D-glucose

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"A freshly prepared solution of α-D-glucose shows a specific rotation of 112∘. Over time, the rotation of this solution decreases and reaches an equilibrium value of 52.5∘. In contrast, a freshly prepared solution of β-D-glucose has a specific rotation of 19∘. The rotation of this solution increases over time to the same equilibrium value of 52.5∘. (a) Why do the specific rotations of the freshly prepared samples change over time, and why do they reach the same equilibrium value? (b) Calculate the percentage of each anomer at equilibrium. "
Stereochemistry of Carbohydrates

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"1. In the monosaccharide derivatives known as sugar alcohols, the carbonyl oxygen is reduced to a hydroxyl group. For example, D-glyceraldehyde can be reduced to glycerol. However, this sugar alcohol is no longer designated D or L. Why? 2. Lactose exists in two anomeric forms, however, no anomeric forms of sucrose have been reported. Why? "
Determination of Acidity and Hydrogen Ion Concentration

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Find the pH of an acidic substance of your choice. Using this pH, show how to find the hydrogen ion concentration, [H ], of the substance using the formula. Discuss the meaning of pH and [H ], the pH scale and why your chosen substance is acidic. Use scientific notation or enough decimal places so that your answer has at least 3 place values. For example, either use 3.44*10-6 or 0.00000344.
Prior, Conditional and Posterior Probability

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"A consulting firm submitted a bid for a large research project. The firm’s management initially felt they had a 50/50 chance of getting the project. However, the agency to which the bid was submitted subsequently requested additional information on the bid. Past experience indicates that for 75% of the successful bids than 40 % of the unsuccessful bids the agency requested additional information. a. What is the prior probability of the bid being successful (that is , prior to the request for additional information)? b. What is the conditional probability of a request for additional information given that the bid will ultimately be successful. c. Compute the posterior probability that the bid will be successful given a request for additional information. "
Valuation of Inventory

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"A stationery store wants to estimate the mean retail value of greeting cards that it has in its inventory. A random sample of 100 greeting cards indicates a mean value of $2.55 and a standard deviation of $0.44. a. Assuming a normal distribution, construct a 95% confidence interval estimate of the mean value of all greeting cards in the store’s inventory. b. Suppose there were 2,500 greeting cards in the store’s inventory. How are the results in (a) useful in assisting the store owner to estimate the total value of her inventory? "
Calculation of the True Population Mean

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"From the results below, is it true that 95% of the sample means will fall between 10.99408 and 11.00192 inches? Explain. Problem is to estimate the mean paper length with 95% confidence Mean- 11 inches Standard deviation of the length is 0.02inches Random sample 100 sheets Mean paper length is 10.998 inches. Z=1.96 for 95% Confidence. Mean or – stand dev/square root n = 10.998 or – 0.02/square root (100) = 10.998 or – 0.00392 = 10.99408 ≤ � ≤ 11.00192 "
Using Linear Regression to Calculate Complex Factors

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We have looked at break-even calculations, scatter plots for estimating demand information, and trends in revenue so far. In each of these, we simplified the analysis to a straight line. While this is useful, sometimes these data are more complex. They may be a curved line, or instead of only one item for the slope, such as variable costs, there may be several factors involved in the estimate. So demand, for example, may be based on price, convenience, or quality. How does a linear regression allow us to better estimate trends, costs, and other factors in complex situations?
Test of Difference in Two Proportions

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A test was conducted to determine whether gender of a spokesperson affected the likelihood that consumers would prefer a new product. A survey of consumers at trade show employing a female spokesperson determined that 70 out of 150 customers preferred the product while 62 of 180 customers preferred the product when a male spokesperson was employed. At the 0.01level of significance do the samples provide sufficient evidence to indicate that on the average more consumers prefer a new product when the spokesperson is female?
Calculation of Expected Value and Variance Using Probability Distribution

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"The budgeting process for a Midwestern college resulted in expense forecasts for the coming year (in $ millions) of $9, $10, $11, $12, and $13. Because the actual expenses are unknown, the following respective probabilities are assigned: .3, .2, .25, .05, and .2. a. Show the probability distribution for the expense forecast. b. What is the expected value of the expense forecast for the coming year? c. What is the variance of the expense forecast for the coming year? d. If income projections for the year are estimated at $12 million, comment on the financial position of the college. "
Journal Entries for Sales and Stock

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Doherty, Inc. is authorized to issue 1,000,000 shares of $1 par value common stock and 400,000 shares of $100 par preferred stock. Prepare the journal entries to record the sale of 10,000 shares of common stock at $17.50 and 400 shares of preferred stock at $103 per share.
Buying Back of in Financial Statements

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Why would a company buy stock? How is it reported on a firm’s financial statement?
Calculation of Carrying Value of Bond

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Klamm Company needs to borrow $100,000. It plans to sign an installment note with a 7% interest rate and make monthly payments for the next 10 years. How much is the monthly payment required? How much of the first month’s payment is interest? What is the carrying value of the note at the end of the first month?
Determination of Cash Received from Issue of Bond

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"Determine the cash received from a $1,000,000 bond issue if the bonds were issued at each of the following prices: A. 89 3/8 B. 97 � C. 101 7/8 D. 103 � "