What two molecules are used to synthesize carbohydrates such as glucose?
A) ATP and NADPH
B) O2 and H2O
C) ADP and ATP
D) CO2 and H2O
Ans: A) ATP and NADPH
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Clues from geology and paleontology suggest that simple cells, or their precursors, arose about _____ years ago.
A. 6 million B. 4 billion C. 2 billion D. 1 million E. 3 million
A host is not considered diseased until an infection changes one's state of health
Indicate whether the statement is true or false
Which of the following statement concerning structural genes is FALSE?
a. Most structural genes encode a single polypeptide. b. Coding regions always contain introns. c. There may be noncoding regions at the end of the gene. d. A single DNA sequence can sometimes code for more than one polypeptide. e. All of the above are true
Normal cell division requires
A) inactivated proto-oncogenes and activated tumor suppressor genes. B) inactivated proto-oncogenes and inactivated tumor suppressor genes. C) activated proto-oncogenes and activated tumor suppressor genes. D) activated proto-oncogenes and inactivated tumor suppressor genes.