Which of the following statements is true regarding protein structure determination?
a. mass spectrometry is the fastest way to determine the three-dimensional structure of a polypeptide or protein, regardless of its size.
b. a protein’s three-dimensional structure can be reliably predicted from its amino acid sequence by computer algorithms that access the vast quantities of structural information archived in public databases.
c. mass spectrometry can be used to determine the amino acid sequences of a complex mixture of different proteins.
d. determination of a protein’s structure by x-ray crystallography does not require prior knowledge of its amino acid sequence.
e. nuclear magnetic resonance can be used to determine the structure of proteins that are too large to crystallize.

You began membership in a new health and fitness club which has access to a dietician and personal trainer. they you develop a special eight-week diet and exercise program. the data in the following table represents your weight, w, as a function of time, t, over an eight-week period. time (weeks) 0 1 2 3 4 5 6 7 8 weight (lb) 150 144 143 141 140 137 137 132 129 your weight decreases during each of the first five weeks of the program. determine the actual change in weight over the first five weeks of the program by subtracting your initial weight from your weight at the end of the first five weeks. what is the sign of your answer? what is the significance of this sign? a. 137-150 = -13 lb; a change in weight is negative because the weight decreases. b. 137-150 = 13 lb; a change in weight is positive because the weight decreases. c. 150-137 = -13 lb; a change in weight is negative because the weight increases. d. 150-137 = 13 lb; a change in weight is positive because the weight increases.

What factors characterize a healthy relationship that contributes to positive social well-being?

Will you get autism from being lonely?