Molecular Probes

Q. A single strand of nucleic acid tagged with a radioactive molecule is called

1. vector
2. selectable marker
3. plasmid
4. probe

Q. Known sequences of DNA that is used to find complementary DNA strands is

1. vector
2. DNA probe
3. plasmid
4. recombinant DNA

Q. DNA or RNA segment tagged with a radioactive molecular is called

1. Vector
2. Probe
3. Clone
4. Plasmid

Q. Southern Blotting uses a nitrocellulose membrane to absorb the DNA from the gel. What makes the DNA move towards the nitrocellulose membrane?

1. Movement of liquid in the gel tank towards the blotting paper
2. Nitrocellulose membrane is positively charged
3. Nitrocellulose membrane contains DNA probes to which DNA fragments attach
4. The gel is placed above the membrane, and gravity pulls the DNA below to the membrane

Q. Nitrocellulose membrane is negatively charged.

1. True
2. False