Scientists & Experiments
What model did Watson-Crick develop with the help of Rosalind Franklin's X-rays?
The Double Helix
What is the biomolecule that is responsible for making up DNA and coding for your traits.
DNA
According to Chargaff's Rule, which of the following is true about DNA?
-A=T, G=C
-A=C, T=G
-A=T=C=G
-A=T, G=C
In Eukaryotes, DNA molecules are located in the....
Nucleus
What was the conclusion of Frederick Griffith's experiment?
Through the process of transformation, dead pneumonia bacteria can transfer its traits to otherwise harmless bacteria to create new, harmful pneumonia bacteria.
What is a bacteriophage..? (One word answer)
Virus
Why was the early X-ray of the DNA helpful to Watson and Crick?
It gave them a clearer picture of how DNA might look like and led them to developing the Double Helix.
In prokaryotes, DNA molecules are located in the....
cytoplasm
Pneumonia
The process by which one strain of bacterium is changed into another strain is called...
transformation
What sort of bond holds nitrogenous bases together in a double helix? Is this bond strong or weak?
Hydrogen Bond, Weak
After DNA replication occurs, how does the new DNA strand compare to the old one?
Each new DNA molecule has one strand from the original molecule and one newly synthesized strand, making each new DNA molecule an exact duplicate of the original.
What was the conclusion of Oswald Avery's experiment?
How does a bacteriophage function?
It clings to a bacteria and injects its DNA into its host. The DNA then forms new bacteriophages and the bacteria will eventually explode to yield many more new bacteriophages.
Which one of the following does a Nucleotide NOT contain:
-5 Carbon Sugar
-Amino Acid
-Nitrogen Base
-Phosphate Group
Amino Acid
What does base pairing mean? Why is this important in DNA replication?
Base pairing means that certain nitrogenous bases MUST be paired with each other (A-T, G-C) If they do not pair with each other, serious defects occur.
What two scientists confirmed Avery's results by experimenting with bacteriophages?
Hershey-Chase
When studying human heredity, what other biomolecule did scientists think was responsible for the passing on of traits
Proteins
Why is it significant that two DNA strands are antiparallel when forming a double helix?
Antiparallel strands run in opposite directions so the bases can line up and hydrogen bonds form between A=T and G=C
What is DNA Polymerase, what role does it have in DNA replication?
DNA polymerase is an enzyme that is responsible for joining individual nucleotides to produce a new strand of DNA. DNA polymerase helps synthesize new bases to attach to the DNA strand that existed before replication.