Exam 28: Biomolecules: Nucleic Acids

Consider the following molecular model.Atoms other than carbon and hydrogen are labeled. Which of the following is a characteristic of this compound?

While the Watson-Crick G-C and A-T base pairs are the most common,other non-standard base pairs are encountered.Draw and label a G-U base pair.Indicate all hydrogen bonds with a dashed line.

Give a one sentence definition of replication.

_____ RNA base sequence with guanine at the 3' end.

Draw and label a G-C base pair.Indicate all hydrogen bonds with a dashed line.

Draw and label the four RNA nucleosides.

_____ 2'-deoxyadenosine 5'-phosphate

On the diagram of DNA, identify: 1) major groove 2) minor groove 3) position of the sugar-phosphate backbone 4) site of possible intercalation

Consider the DNA polymerase chain reaction.After 5 cycles have been completed,how many copies of the original DNA are present?

Draw and label an A-T base pair.Indicate all hydrogen bonds with a dashed line.

Draw and label an A-U base pair.Indicate all hydrogen bonds with a dashed line.

_____ DNA base sequence with cytosine at the 3' end.

Describe,in general terms,the steps involved in the automated synthesis of the DNA sequence GCT.

1) Label the anticodon 2) Label the position of attachment of the amino acid 3) Draw the structure of the amino acid that would be attached 4) Indicate the corresponding mRNA codon

During DNA synthesis,the free amino group does not need to be protected for which base?

In the diagram below,fill in the terms in the appropriate places indicated by a letter.

Of the two sets of DNA base pairs,which would you expect to be stronger and why?

What is the purpose of the addition of aqueous ammonia during the synthesis of DNA?

Consider the following diagram. ​ ​ What DNA sequence (5' to 3') would correspond to the third codon?

What is the primary structural difference between RNA nucleotides and DNA nucleotides?