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Q1. What are the effects of maternal cocaine use and smoking on fetal growth? Which one of the following is a factor? Cocaine use, fetal growth, receiving prenatal care, prenatal alcohol exposure?
Q2 Modern theory suggests that the early pre-life atmosphere on Earth was a reducing one. Why is it believed that oxygen was not present as life formed on Earth?
Q3. Laila Iskandar Kamel, a winner of the Goldman Prize has worked with people called Zabbaleen to generate a sustainable enterprise. What do these people do?
Provided the rising rates of hypercholesterolemia and hypertension in the United States and other industrialized nations, you are interested in studying the importance of cholesterol transport in the sodium.
The carboxyl group on the C-gamma carbon of glutamatic acid has a pka = 4.3. Determine the concentration of the various ionic species in a 0.01 M solution of glutamatic acid at pH = 5.
Outline why a diet containing a high proportion of unsaturated fat may decrease the risk of developing cardiovascular disease. What other dietary changes can contribute to a reduced risk of cardiovascular disease?
Consider the meaning of the term "ecology." How do the ideas of energy and chemical cycles, community structure, biodiversity and succession fit together to form the basis of the way the natural world works?
A colloidal system is stable in the absence of polymer. A small amount of polymer is added and the colloidal particles coagulate but if a large amount of polymer is added they redisperse.
A three-factor cross in Salmonella typhimurium was performed using bacteriophage P22. The cross was between an arg-leu-his- recipient bacterium and bacteriophage P22, which was grown on an arg+leu+his+ strain. 1000 arg+ transductants were selected..
1. (a)Suppose we wish to determine the structure of a 56-residue protein. Would NMR or X-ray crystallography be likely to be more successful and informative? Why??(b) Same as above, but this time it's a 75 kDa protein.
What are the advantages of having a gene regulated by both positive and negative control, rather than by just one or the other?
Explain how promoter function was measured in the article "genetic analysis of the TBX1 gene promoter in ventricular septal defects" by Haihua wang, Dongfeng Chen, Liming Ma, Haihong Meng, Yumei Liu, Wne Xie, Shuchao Pang, and Bo Yan.
If the forward mutation rate is 1 x 10-5 new mutations per gene per generation, what is the average number of new mutations per gamete per generation? Show your work.
Consider a hypothetical plant. There are two genes that dictate how the flower will smell. These two genes are located ON THE SAME CHROMOSOME.
The Verhulst's logistic model has been practical to the natural growth of the halibut population in certain areas of the Pacific Ocean. Let NN, measured in kg, be the total mass (or biomass) of the halibut population at time tt.
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