Which of the following is not true of the lacO region of the lac operon?
A. It is the operator of the operon.
B. It produces a diffusible product that can regulate the expression of the operon.
C. It is bound by the Lac repressor when lactose is unavailable.
D. Its mutation leads to constitutive expression of the operon.
B
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Mitochondria move from the cytoplasm into mitochondria using _____
Proteins coded for by nuclear DNA but found within A) signal sequences (peptides) B) random transport vesicles C) attachment of ribosomes to outer mitochondrial pores and direct deposition into the inner mitochondrial compartment D) mRNAs that are manufactured in the nucleus, but translated by mitochondrial ribosomes
Glomeromycetes can grow independently of their plant partners
A. true B. false
What type of RNA carries amino acids to the ribosome?
A. complementary RNA B. messenger RNA C. ribosomal RNA D. double-stranded RNA E. transfer RNA
The tryptophan operator ___________________________
(a) is an allosteric protein. (b) binds to the tryptophan repressor when the repressor is bound to tryptophan. (c) is required for production of the mRNA encoded by the tryptophan operon. (d) is important for the production of the tryptophan repressor.