Which protein modification is most closely linked to protein degradation?
A) phosphorylation
B) acetylation
C) glycosylation
D) methylation
E) ubiquitination
Answer: E
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Genetic goitrous cretinism and alkaptonuria are metabolic disorders in the ____ pathway
a. nucleic acid b. thalassemia c. phenylalanine d. paraoxonase e. lipid biochemical
Which of the following is false about plant
hormones? a. They bind to receptors on target cells. b. Their mechanism of action is completely different from that of animal hormones. c. Signal transduction may influence a metabolic pathway. d. The plant response may depend on a change in gene expression. e. Their effect can be synergistic or antagonistic.
Which of the following is the form of energy contained in nutrient molecules and in ATP's high-energy bonds?
a) mechanical energy b) potential energy c) kinetic energy d) radiation energy
In a negative feedback mechanism, the _____ is a muscle or gland that functions to carry out the selected response
receptor control center effector factor