How many beta sheets are present in crambin?
a. 1
b. 2
c. 3
d. 4
b
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As filtrate moves through the ____ in mammals, it generally undergoes a dramatic decrease in osmolarity
a. distal convoluted tubule b. Bowman's capsule c. descending segment of the loop of Henle d. proximal convoluted tubule e. ascending segment of the loop of Henle
Which of the following is a sex-linked disorder?
A) Lesch—Nyhan syndrome B) Alkaptonuria C) Albinism D) Down syndrome E) Tay—Sachs disease
How many years ago did the plants that formed fossil fuels actually live?
A) 300,000,000,000 B) 300,000,000 C) 300,000 D) 30,000
You would like to identify as many bacterial species as possible in the human mouth. Why is biochemical testing not the most efficient and accurate method of completing this task?
A. Since you do not know the growth characteristics and metabolic properties of the bacteria in the mouth, you cannot determine all varieties of media to use for isolation and culture. B. Bacteriological media is very expensive, particularly when you would have to use a variety of types to identify the different bacteria. C. Biochemical testing, using a variety of media, is inaccurate. It has been replaced by more advanced testing procedures. D. Bacteria in the mouth are difficult to grow because of the adverse conditions in the oral habitat.