In the biosynthesis of nucleotides, pyrimidines are assembled starting with ribose-5-phosphate while ribose-5-phosphate is added after synthesis of the nitrogenous base for purines.
Answer the following statement true (T) or false (F)
False
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The electrical stimulus for each human heartbeat begins in the
A. right atrium at the sinoatrial node. B. left atrium at the sinoatrial node. C. right atrium at the atrioventricular node. D. right ventricle at the atrioventricular node. E. pulmonary trunk at the sinoatrial node.
Pathogen is ________.
A. a name given to all archaea B. a name given to all bacteria C. a name given only to bacteria that cause serious illnesses in humans D. a name given only to helpful bacteria
The enzyme responsible for breaking down
alcohol is a. alcohol methylase. b. alcohol polyphosphorylase. c. hydroxyl alcoholgenase. d. transmethylogenase. e. alcohol dehydrogenase
The pain produced in an internal organ may be perceived as occurring somewhere else. This phenomenon is called ____.
A. mixed nerve messages B. referred pain C. phantom pain D. psychosomatic pain E. hypochondria