Chapter 17 and 18- Gene Expression

The anticodon of a particular tRNA molecule is

complementary to the corresponding mRNA codon

Which of the following is a molecule that helps to "turn off" the expression of genes in a cell?

corepressor

Muscle cells differ from nerve cells mainly because they

express different genes

Where does RNA polymerase begin transcribing a gene into mRNA?

it starts after a certain nucleotide sequence called a promoter

A particular triplet of bases in the template stand of DNA is 5'-AGT-3'. What would be the corresponding codon for the mRNA that is transcribed?

3'-UCA-5'

Which of the following processes correctly describes alternative RNA splicing?

It can allow the production fo proteins of different sizes and functions from a single mRNA.

Which of the following functions are characteristics of general transcription factors in eukaryotes?

They bind to other proteins or to the TATA box

miRNAs can control gene expression by what action?

binding to mRNAs and degrading them or blocking their translation

which of the following molecular structures contains codons?

mRNA

Which of the following is an example of post-transcriptional control of gene expression?

the removal of introns and alternative splicing of exon