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DNA: THE GENETIC MAT

DNA: THE GENETIC MATERIAL - CSCC

QuestionAnswer
Griffith found that extracts of dead pathogenic strains of a Strep bacterium can "transform" live harmless strains into live pathogenic strains. A) True B) False True
Avery and co-workers discovered that the properties of the transforming principle resembled DNA in which of the following ways: A) the transforming principle has the same chemistry as DNA B) the transforming principle exhibits the same behavior as DNA C) the transforming principle can be destroyed by DNA digesting enzymes D) all of the above
Avery's results indicating that DNA is the hereditary material was widely accepted and appreciated. A) True B) False False
Hershey and Chase used radioactive isotopes to "label" the DNA and protein in bacteria that were purposely infected with viruses. A) True B) False False
The conclusion of Hershey and Chase's experiment was that genes that viruses use to specify new viruses are made of protein and not DNA.A) True B) False False
Each nucleotide subunit of DNA consists of A) deoxyribose B) phosphate group C) an organic base D) all of the above D) all of the above
All of the nucleotide subunits in a DNA molecule have exactly the same structure. A) True B) False False
The DNA molecule is a single stranded molecule that is coiled like a spring. A) True B) False False
The true structure of DNA was deduced by _______________ using Tinkertoy-like models Watson & Crick
In DNA, each chain in the helix is a complementary mirror image of the other A) True B) False . True
A possible mechanism by which DNA can be copied is called A) conservative replication B) semiconservative replication C) dispersive replication D) all of the above D) all of the above
The Meselson and Stahl experiment confirmed that the model that DNA replicates is in a ________________ manner. semiconservative
An enzyme called DNA polymerase unwinds the DNA double helix in the process of replication. A) True B) False False
The place where the parent DNA molecule becomes unzipped is called the replication fork
The enzyme that covalently links the lagging sections together once the primers have been removed is called DNA ligase
There is only one way in which the genetic message is altered which is by mutation. A) True B) False False
Genetic mutations are very common. A) True B) False False
Mutations are always inherited. A) True B) False False
Some changes in a DNA sequence can result in a change in a single amino acid which results in a mutated protein that may not function the same as the normal protein. A) True B) False True
The hypothesis that chemicals cause cancer was first advanced in 1761. A) True B) False True
As a result of the experiments performed by Frederick Griffith we found that hereditary information can be added to cells from other cells.
The experiment performed by Alfred Hershey and Martha Chase showed that the molecule viruses use to specify new viruses is DNA.
Erwin Chargaff, Rosalind Franklin, Francis Crick, and James Watson all worked on pieces of information relating to the structure of DNA
All four DNA nucleotides differ in the type of nitrogen base
Lists the purine nucleotides? adenine and guanine
If one strand of a DNA molecule has the base sequence ATTGCAT, its complementary strand will have the sequence TAACGTA
Regarding the duplication of DNA, we now know that each double helix splits down the middle into two single helices, and each one then acts as a template to build its complement.
DNA polymerase can only add nucleotides to an existing chain, so ________________ is required. a primer
Genetic messages can be altered in two ways: by mutation or by recombination.
Mutations can occur in germ-line tissues and be passed on to future generations.
Created by: Bonnie870
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