In the absence of tryptophan, what happens to the genes within the trp operon? a) the regulator without tryptophan-binding prevents the genes from being transcribed. b) the regulator falls off the operator and structural genes get transcribed. c) lack of tryptophan increases the level of camp high, which leads to activation of cap protein and gene expression. d) the active repressor binds to the operator and genes do not get transcribed. e) the active activator binds to the operator and transcription of structural gene takes place.

Research question: why are the carrots that grew on the left side of the garden larger than the carrots that grew on the right side of the garden? which hypothesis is based on this research question? a comparison of people with gardens to people without gardens will show who is likely to live longer. b. carrots are thought to be good for your eyesight and should be eaten regularly. c. carrots that are provided lots of sunlight grow to a larger size than carrots grown in the shade. d. eating fresh vegetables every day is a healthy thing to do.