Scientists once thought proteins were more likely than DNA to be hereditary material, because proteins are more variable and chemically complex than DNA
Definition
True
Term
Fred Griffith showed that DNA from a smooth bacterium could transform a rough bacterium into a smooth bacterium
Definition
True
Term
DNA proofreading enzymes can detect mismatched bases that are added to DNA during replication
Definition
True
Term
What holds together the two strands of the DNA double helix?
Definition
Weak hydrogen bonds between complementary bases
Term
The enzyme DNA ligase is responsible for tying together the two strands of DNA into a double helix
Definition
False
Term
Chargaff's Rule states that in any species, the amount of T=A and the amount of C=G in DNA.
Definition
True
Term
Which is true of the DNA molecule
All of these
It is a double helix.
The amount of Adenine equals the amount of Thymine,
The amount of Guanine equals the amount of Cytosine.
Definition
all of these
Term
As a DNA double helix "unzips", replication of each strand of the DNA proceeds in the same direction along the molecule.
Definition
False
Term
Bacteriophages are viruses that can infect only bacteria
Definition
True
Term
Hershey and Chase labelled DNA and proteins of viruses and determined that DNA, and not protein, is the hereditary molecule.
Definition
True
Term
Griffith discovered that rat DNA could be inserted into bacteria.
Definition
False
Term
Which of the following enzymes adds DNA nucleotides to a growing strand of DNA during DNA replication
Definition
DNA polymerase
Term
Which of the following is the most likely difference between the DNA of a human and the DNA of an Amoeba?
Definition
Term
For DNA to be replicated, the DNA double helix must first be separated by the enzyme helicase.
