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Biochemistry
Two students performed the same experiment, testing how far iodine will diffuse through starchy tissue, such as potatoes. They cut 5 potato squares each, all of equal sizes, and placed them into small cups with iodine solution for 15 minutes. Then they measured how far from the edge of the potato the iodine diffused into the potatoes, in millimeters.
⎡⎣⎢⎢⎢⎢⎢Student 1Student 2Distance Diffused (mm)Trial 13.253.14Trial 23.173.43Trial 33.263.22Trial 43.643.37Trial 53.443.28⎤⎦⎥⎥⎥⎥⎥
What is the range of student 1’s results?
A. 3.29
B. 3.35
C. 0.47
D. 0.29
⎡⎣⎢⎢⎢⎢⎢Student 1Student 2Distance Diffused (mm)Trial 13.253.14Trial 23.173.43Trial 33.263.22Trial 43.643.37Trial 53.443.28⎤⎦⎥⎥⎥⎥⎥
What is the range of student 1’s results?
A. 3.29
B. 3.35
C. 0.47
D. 0.29
Biochemistry
What is the significance of Iodine number?
Biochemistry
State the importance of iodine in the diet of farm animals.
Biochemistry
function of lysosomes
Biochemistry
Function of Endoplasmic reticulum
Biochemistry
How do you interpret the serum TSH measurement in the evaluation of a patient with suspected thyroid disease?
Biochemistry
Outline the mechanisms involved in the regulation of calcium.
Biochemistry
Lois, a 32-year old unmarried female business executive develops amenorrhea. She has not recently lost weight but states that her job is very stressful. Laboratory evaluation reveals the following results:
PARAMETER
VALUE
NORMAL RANGE
Serum estradiol
14pg/ml
23-145
LH
1.2mIU/ml
2-15
FSH
1.5mIU/ml
2-20
Prolactin
6.2ng/ml
2-25
TSH
1.2µU/ml
0.5-5.0
A serum pregnancy test is negative and an MRI scan of her pituitary gland is normal. What is the probable diagnosis? Explain.
PARAMETER
VALUE
NORMAL RANGE
Serum estradiol
14pg/ml
23-145
LH
1.2mIU/ml
2-15
FSH
1.5mIU/ml
2-20
Prolactin
6.2ng/ml
2-25
TSH
1.2µU/ml
0.5-5.0
A serum pregnancy test is negative and an MRI scan of her pituitary gland is normal. What is the probable diagnosis? Explain.
Biochemistry
1. Define pH and pKa. Use these concepts to predict the ionization state of any given amino acid or its side chain in a protein.
Biochemistry
6) You create 40 mL of a 3.0 M buffer with a pH of 5. You add 7 mL of a 1.25M H2SO4 solution to the buffer you made, what is the new pH?
7) You create 50 mL of a 1.0M buffer with a pH of 2. You add 2 mL of a .45M HCl solution to the buffer you made, what is the new pH?
8) You create 30 mL of a 1.0M buffer with a pH of 7.5. You add 1.3 mL of a .66M HCl solution to the buffer you made, what is the new pH?
9) You create 100 mL of a 0.5M buffer with a pH of 6.8. You add 1.0mL of a 1.0M NaOH solution to the buffer you made, what is the new pH?
10) You create 100 mL of a 0.5M buffer with a pH of 11.75. You add 10.0 mL of a 1.0M HCl solution to the buffer you made, what is the new buffer [Base]?
7) You create 50 mL of a 1.0M buffer with a pH of 2. You add 2 mL of a .45M HCl solution to the buffer you made, what is the new pH?
8) You create 30 mL of a 1.0M buffer with a pH of 7.5. You add 1.3 mL of a .66M HCl solution to the buffer you made, what is the new pH?
9) You create 100 mL of a 0.5M buffer with a pH of 6.8. You add 1.0mL of a 1.0M NaOH solution to the buffer you made, what is the new pH?
10) You create 100 mL of a 0.5M buffer with a pH of 11.75. You add 10.0 mL of a 1.0M HCl solution to the buffer you made, what is the new buffer [Base]?
