The chances of guessing the right answer to this question are 

A. 1/1.
B. 1/2.
C. 1/3.
D. 1/4.
 


D. 1/4.

Biology & Microbiology

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X-ray data showed that the spacing between repeating units along the axis of the DNA helix is

A) 2.0 angstroms. B) 3.4 angstroms. C) 20 angstroms. D) 34 angstroms.

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The space and fluid enclosed by the highly folded inner mitochondrial membrane is the

A. matrix. B. nucleus. C. stroma. D. outer membrane. E. cytoplasm.

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The pancreatic secretions governing glucose levels are precisely controlled by ____

a. neural connections to the pancreas b. a positive feedback loop c. cooperative interactions d. a negative feedback loop e. releasing factors

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Which of the following is a common ailment characterized by a burning sensation caused by gastric juices backing up into the esophagus?

A) acidosis B) gastritic stress C) porosis D) heartburn

Biology & Microbiology