Which of the following statements about introns is INCORRECT?

The diagram below shows the 5′ end of a eukaryotic mRNA molecule. Based on the sequence given, which of the three possible reading frames would you expect to be used for translation?  (Note: the vertical lines shown in the answer choices are meant to indicate the three distinct reading frames; they do not necessarily indicate codons.)   5′-GGCCACCAUGGCUGAA…

Which of the following is a TRUE statement about a single eukaryotic chromosome?

For the genes of the tryptophan operon to be expressed in bacteria, which of the following must occur to the Trp repressor?

TRUE/FALSE.  Indicate whether each of the following statements is true (A) or false (B).  A partly false statement is still false!                      When an intron is excised from a pre-mRNA, the exons are joined to form a lariat.

Which of the following is TRUE about replication origins?

Which of the following is an ACCURATE statement about DNA mismatch repair?

Refer to the diagram below to answer the NEXT question.     Which of the above structures accurately depicts a region of a vertebrate pre-mRNA containing two exons separated by an intron? (The symbol ‘//’ indicates a large, unspecified stretch of nucleotides.)

For the next THREE questions, refer to diagram below which depicts an RNA chain (left) forming complementary base pairs with a DNA chain (right).     Which of the bases shown above is adenine?

Which is a logical reason as to why DNA chains are built by adding nucleotides to the 3′ end rather than to the 5′ end of the growing chain?