The presence of which combination of molecules would lead to active transcription of an operon?
A) activator + corepressor
B) activator + repressor
C) inducer + corepressor
D) repressor + corepressor
E) activator + inducer
E
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High-energy electrons from molecules of NADH and FADH2 are transferred to a chain of proteins within the electron transport chain. What is the final electron acceptor of the electron transport chain?
A. carbon dioxide B. oxygen C. cytochrome c D. ubiquinone E. NAD+
What hormone stimulates the milk-ejection reflex?
A. antidiuretic hormone B. oxytocin C. vasopressin D. parathyroid hormone E. aldosterone
In the absence of oxygen, a small amount of ATP can be produced in a metabolic pathway that also produces ______ acid
Fill in the blank(s) with the appropriate word(s).
Which of the following molecules does NOT have a
total of three carbon atoms? a. PEP b. PGAL c. fructose-1,6-biphosphate d. pyruvate e. phosphoglycerate (PGA)