Which component of the 50S subunit is believed to be responsible for catalysis?
What will be an ideal response?
Ans: The 23S rRNA component of the 50S subunit has peptidyl transferase activity. From the crystal structure it is clear that no soluble protein factors or ribosomal proteins are close enough to where peptide bond formation is occurring to be the catalyst.
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Leading the way in China's economic growth are its state-owned enterprises
Indicate whether this statement is true or false.
What does ricin do in the body? a. Denatures enzymes
b. Increases metabolic reactions. c. Increases the rate at which ribosomes transcribe proteins. d. Increases the rate at which ribosomes translate proteins. e. Inactivates ribosomal function.
Endothermic animals
a. use up more energy than ectotherms. b. have more stamina than ectotherms. c. have a higher metabolic rate than ectotherms. d. may have layers of fat to reduce heat loss. e. fit all of these descriptions.
Secondary growth occurs as a result of the activity of which two lateral meristems?
a. vascular cambium and cork cambium b. apical meristem and cork cambium c. primary meristem and secondary meristem d. periderm and cork cambium e. apical meristem and vascular cambium