Exam 12: From Gene to Protein

Translation,a process carried out by the ribosomes,occurs in the cell ________.

In tRNA,an amino acid is covalently bonded to an anticodon.

If both strands of the DNA of a gene underwent transcription and translation,they would produce the same mRNA and protein.

The base sequence of mRNA specifies the sequence of amino acids in a ________.

The key enzyme used during transcription is

An insertion or deletion mutation can cause a change in the reading of the mRNA codons;in essence,it scrambles the codons.Such a mutation results in a genetic ________.

The sequence of nucleotides in an mRNA molecule

Following transcription,the

During transcription

The intermediary molecule that transmits information in a gene to a ribosome is ________.

Prokaryotes lack membrane-bound organelles and thus do not have nuclei;therefore

The bases present in an RNA molecule are

If X is a base that is inserted into each of the following DNA sequences,on which of them is it most likely to have the greatest effect on the gene's protein product?

In bacteria,the antibiotic tetracycline blocks the site where tRNA molecules enter the ribosome.The most likely reason that bacteria die from treatment with tetracycline is because the antibiotic

The lac repressor stops the expression of the genes in the lac operon.It does this by binding to a gene regulatory DNA sequence that controls the expression of the genes responsible for lactose uptake and degradation.This DNA sequence is called a(n)

Which of the following is true of rRNA?

Which of the lettered arrows in the following diagram of translation indicates a codon?

In the genetic code,an amino acid is specified by

The genes that control lactose utilization (its uptake and degradation)in bacteria are arranged sequentially in the bacterial chromosome under the control of a single promoter sequence.This arrangement of genes is called a(n)

If a strand of DNA has the sequence CGTAA,the mRNA made from this molecule will have the sequence