Molecular Genetics

Looked at the ability of bacteria to cause disease

• Hershey & Chase

• Erwin Chargaff

• Frederick Grffith

• Watson & Crick

Hershey & Chase discovered in ______, ______ is the ________

• a virus, DNA, infectious agent

• nitrogenous bases, sugar, backbone

• mice, virulency, effect of S cells

• DNA, adenine, same as thymine

What are Chargaff's Rules?

• Every leading strand of DNA goes in a 3' -> 5' direction and every lagging strand goes in a 5' -> 3' direction

• 1) All DNA and RNA contain deoxy ribose, 2) Translation occurs in the cell membrane, 3) All DNA and RNA come from pre-existing DNA

• Every leading strand of DNA goes in a 5' -> 3' direction and every lagging strand goes in a 3' -> 5' direction

• DNA structure is different in different species, A%=T% and G%=C%

What is Rosalind Franklin commonly uncredited for?

• being the first human to extract DNA

• the advancements she made for technology and equipment used for understanding the protein synthesis process

• all of the above

• her contribution to the discovery of the helical structure of DNA

What is DNA comprised of?

• deoxy ribose, phosphate, nitrogenous bases

• dihydrogen monoxide, ribose, amino acids

• nucleotides, nucleic acid, phosphate, amino acids

• amino acids, phospholipids, nucleotides

What's a ratio that explains how purines and pyrimidines pare?

• 2 purines : 1 pyrimidine

• 1 purine : 3 pyrimidines

• 1 purine : 1 pyrimidine

• 3 purines : 2 pyrimidines

Which are pyrimidines?

• Adenine

• Guanine

• Thymine

• Cytosine

Which are purines?

• Adenine

• Thymine

• Cytosine

• Guanine

What enzyme is responsible for unwinding the DNA in DNA replication?

• ligase

• helicase

• DNA polymerase

• esticase

When is DNA replicated before mitosis/meiosis?

• telophase

• G4-phase

• mesophase

• s-phase