Exam 14: From Dna to Protein: Gene Expression

Imagine that a novel life-form is found deep within Earth's crust. Evaluation of its DNA yields no surprises. However, it is found that a codon for this life-form is just two bases in length. How many different amino acids could this organism be composed of?

Which of the following does (do) not follow the "central dogma"?

Gene expression can be regulated

Which of the following is not a difference between RNA and DNA?

The termination of transcription is signaled by

Transcription

A template DNA strand has the following base sequence: 3´-GUC, CCA-5´. What would be the corresponding mRNA sequence?

Termination of transcription involves a

What would be the effect of a deletion of the DNA encoding the targeting sequence for that gene product? (Imagine that this protein was targeted to go to the endoplasmic reticulum and the signal sequence was removed as a result of this deletion.)

The central dogma of molecular biology states that _______ is transcribed into _______, which is (are) translated into _______.

Auxotrophs are mutant strains that

What would happen if a mutation occurred in DNA such that the second codon of the resulting mRNA was changed from UGG to UAG?

Within a group of mutants with the same growth requirement (i.e., the same overt phenotype), mapping studies determined that individual mutations were on different chromosomes. This indicates that

The study of Neurospora mutants grown on various supplemented media led to

A tRNA that has bonded to an amino acid is referred to as _______ tRNA.

The synthesis of DNA from RNA is called _______.

The basic units of both DNA and RNA molecules are the _______.

Translate the following mRNA: 3´ - G A U G G U U U U A A A G U A - 5´

How does RNA differ from DNA?

Which of the following statements about the flow of genetic information is true?