QUESTIONS:

 

1. What is the correct order of information flow in bacterial and eukaryotic cells?

 

2. What are the function of enzymes involved in the replication process?

 

3. RNA grows in the _________ direction, as RNA polymerase moves along the template DNA strand in the         ___________ direction?

 

4. What is the role of tRNA in translation process?

 

5. Suppose you mix the following components of protein synthesis in a test tube : amino acid from a rabbit;           ribosomes from a dog; tRNAs from a mouse; mRNA from a chimpanzee; and necessary enzymes plus an         energy source from a giraffe. If protein synthesis occurs, which animal's protein will be made?

 

                                                                          Goodluck!

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS:

 

1. DNA---> mRNA---> protein

 

2. Helicase- Open the double helix at replication forks by distrupting the hydrogen bonds that hold the two             strands together.

 

    Single-Strand Binding (SSB) Protein- Binds to single strands of DNA and prevents the helix from reforming       before it can be used as a template for replication.

 

    Topoisomerase- Breaks one or both DNA strands, preventing excessive coiling during replication, and then        rejoins them in a more relaxed configuration.

      

    DNA polymerase- Links nucleotide subunits to form a new DNA strand from a DNA template.

 

    DNA primase- Synthesizes short RNA primers on the lagging strand. Begins replication of the leading               strand.

 

    DNA ligase- Links Okazaki fragments by joining the 3' end of the new DNA fragment to the 5' end of the           adjoining DNA.

 

3. 5'--->3' ; 3'--->5'

 

4. To transport amino acid to the ribosome

 

5. Chimpanzee