Which if the following statements about weak acids is correct?

Weak acids always contain C atoms

The percentage dissociation for weak acids is usually in the range if 40-60 percent

Weak acids molecules readily lose only a small percentage of their acidic hydrogen atoms

more than one correct response

No correct response

Condsider five conditions of some enzyme(s) with the following Lineweaver-Burk equations.

A) y = 1x + 0.25

B) y = 0.25x + 0.25

C) y = 1x + 1

D) y= 1x + 4

E) y= 0.25x + 1

i) Which set of conditions demonstrates the enzyme that is least able to form the ES complex easily?

v) Which pair of sets of conditions would represent an enzyme with and without a competitive inhibitor?

vi) Which pair of sets of conditions would represent an enzyme with an without a noncompetitive inhibitor?

vii) Which pair of sets of conditions would represent an enzyme in the presence of an allosteric activator and in the presence of an allosteric inhibitor?

viii) Which set of conditions demonstrates the enzyme with the lowest k1?

ix) Which set of conditions shows an enzyme with equal values for Vmax and Km?

x) Which set of conditions shows an enzyme with a specific constant of 1?

1. Which of the following would be consumed in a lacto-ovo vegetarian diet?

1. Vegetables, fruits, beans, grains, nuts and seeds
2. Vegetables, fruits, seeds, milk, poultry, seafood and eggs
3. Vegetables, fruits, seeds, nuts, eggs and poultry
4. Vegetables, fruits, seeds, milk and eggs

2. All of the following are reasons people choose a vegetarian or vegan lifestyle EXCEPT:

1. Concern for animals
2. Religious reasons
3. Desire for improved health
4. Desire to gain weight

3. All of the following are health benefits associated with a vegan or vegetarian diet EXCEPT:

1. Lower risk of certain cancers
2. Lower risk of digestive disorders
3. Lower risk of obesity
4. Lower risk of diabetes

4. Some plant-based foods naturally contain _____, which reduce the risk of chronic disease.

1. amino acids
2. phospholipids
3. phytochemicals
4. essential minerals

5. A _____ diet consists of only plant-based foods and includes no animal products.

1. lacto-vegan
2. vegetarian
3. lacto-ovo vegetarian
4. vegan

1.       An obstruction in blood flow to the kidneys would result in

2. Why do you need parietal cells in your stomach to produce red blood cells?

A.The stomach is needed for nutrition, and you need amino acids and iron to make red blood cells.

B.Iron (Fe2+) is absorbed in the stomach by parietal cells

C.Parietal cells secrete intrinsic factor, which is necessary to absorb vitamin B12 in the small intestine.

D.Parietal cells secrete intrinsic factor that binds Fe2+, allowing it to be absorbed in the small intestine.

3.   What is true about a person with a Rh- blood type?

Download the Perl code of "Example 1: Conceptual Translation" from "Resources for Undergraduate Bioinformatics Instruction" at Wright State University http://birg.cs.wright.edu/resources/index.shtml. The program performs the conceptual translation on three forward reading frames from mRNA nucleotides to amino acids. The mRNA sequence is provided as the command line argument. Modify it to add the following features:

a. (5pts) If no argument is provided in the command line, prompt the user to input a nucleotide sequence. Note that the modified code should still take the command line argument if present. done
b. (5pts) Accept lower case letters. done

c. (5pts) Accept a DNA sequence as the input. That is, thymine (T or t), should also be valid in the input.
d. (10pts) Perform the conceptual translation on the three backward reading frames in addition to on the forward reading frames.

Note that:

You are not allowed to modify the hash table provided in the code of Example 1.

The code is required to utilize the binding operator =~ whenever possible

instead of loops.

The absorbance of a 1 mg/ml sample of lysozyme was measured in a cuvette of thickness 1.00 cm and was found to be 3.19 at 240 nm and 2.58 at 280 nm. The molar absorption coefficients of tryptophan and tyrosine at 240 nm are 2.00 x 103 dm³ mol^-1 cm^-1 and 1.12 x 104 dm³ mol^-1 cm^-1, respectively, and at 280 nm they are 5.40 x 103 dm3 mol^-1 cm^-1 and 1.50 x 103 dm³ mol^-1 cm-1, respectively. What are the molar concentrations of the two amino acids in the 1 mg/ml protein sample? If the molar mass of the protein is 14,400 g/mol, how many tryptophans and tyrosines are present in the sequence of this protein? (looking for the molar ratio, moles aa/mol protein) What is the molar absorption coefficient of the lysozyme protein at 280 nm? What would be the % Transmittance of the same protein sample if measurements were made in a 0.1 cm cuvette at 280 nm?

Regulation of gene expression occurs primarily at the level of transcription. What would be different if cells controlled gene expression primarily at the level of translation?

If an enhancer associated with a gene was deleted or mutated, what would be the effect on levels of gene expression?

Cells regulate gene expression at the level of translation by:

Using 1.0 nM enzyme X for the enzyme kinetics experiments, you obtained the reaction rates at different concentrations of substrate (shown in the following table). Assume that the enzyme X follows a typical Michaelis-Menten kinetics.

[substrate] (μM) Reaction rate (μmol/min)

2 7

5 17

10 29

20 44

50 67

100 80

200 89

500 95

1000 98

a) Estimate the Vmax and Km values of the enzyme in this reaction using double reciprocal plot.

b) If 5.0 nM of the enzyme X is used in the experiment, what will be the Vmax and Km of the enzyme X?.