7553994
Descrição
Quiz por Stefania Schoen, atualizado more than 1 year ago
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Criado por Stefania Schoen
quase 8 anos atrás
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Questão 1
Questão
By observing bacterial transformation, Avery and other scientists discovered that the nucleic acid DNA stores and transmits genetic information from one generation of bacteria to the next.
Responda
- True
- False
Questão 2
Questão
Hershey and Chase's experiment with bacteriophages confirmed Avery's results, convincing many scientists that DNA was the genetic material found in genes-not just in viruses and bacteria, but in all living cells.
Responda
- True
- False
Questão 3
Questão
The DNA that makes up genes must be capable of storing, copying, and transforming the genetic information in a cell.
Responda
- True
- False
Questão 4
Questão
DNA is a nucleic acid made up of amino acids joined into long strands or chains by covalent bonds
Responda
- True
- False
Questão 5
Questão
The clues in Franklin's X-ray pattern enabled Watson and Crick to build a model that explained the specific structure and properties of DNA.
Responda
- True
- False
Questão 6
Questão
The double-helix model explains Chargaff's rule of base pairing and how the two strands of DNA are held together.
Responda
- True
- False
Questão 7
Questão
DNA poly merase is an enzyme that joins individual nucleotides to produce a new strand of DNA.
Responda
- True
- False
Questão 8
Questão
Replication in most prokaryotic cells starts from a single point and proceeds in two directions until the entire chromosome is copied.
Responda
- True
- False
Questão 9
Questão
In prokaryotic cells, replication may begin at dozens or even hundreds of places on the DNA molecule, proceeding in both directions until each chromosome is completely copied.
Responda
- True
- False
Questão 10
Questão
The process by which one strain of bacterium is changed into another strain is called
Responda
-
transcription
-
transformation
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duplication
-
replication
Questão 11
Questão
Bacteriophages are
Responda
-
a form of bacteria.
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enzymes.
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coils of DNA.
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viruses.
Questão 12
Questão
Which of the following researchers used radioactive markers in experiments to show that DNA was the genetic material in cells?
Responda
-
Frederick Griffith
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Oswald Avery
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Alfred Hershey and Martha Chase
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James Watson and Francis Crick
Questão 13
Questão
Before DNA could definitively be shown to be the genetic material in cells, scientists had to show that it could
Responda
-
tolerate high temperatures.
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carry and make copies of information.
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be modified in response to environmental conditions.
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be broken down into small subunits.
Questão 14
Questão
A nucleotide does NOT contain
Responda
-
a 5-carbon sugar.
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an amino acid.
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a nitrogen base.
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a phosphate group.
Questão 15
Questão
According to Chargaff's rule of base pairing, which of the following is true about DNA?
Responda
-
A=T and C=G
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A-C and T=G
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A=G and T=C
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A=T=C=G
Questão 16
Questão
The bonds that hold the two strands of DNA together come from
Responda
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the attraction of phosphate groups for each other.
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strong bonds between nitrogenous bases and the sugar-phosphate backbone.
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weak hydrogen bonds between nitrogenous bases.
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carbon-to-barbon bonds in the sugar portion of the nucleotides.
Questão 17
Questão
In Prokaryotes, DNA molecules are located in the
Responda
-
nucleus.
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ribosomes.
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cytoplasm.
-
histones.
Questão 18
Questão
In eukaryotes, nearly all the DNA is found in the
Responda
-
nucleus.
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ribosomes.
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cytoplasm.
-
histones.
Questão 19
Questão
The main enzyme involved in linking individual nucleotides into DNA molecules is
Responda
-
DNA protease.
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ribose.
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carbohydrase.
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DNA polymerase.
Questão 20
Questão
During replication, which sequence of nucleotides would bond with the DNA sequence TATGA?
Responda
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TATGA
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ATACT
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CACTA
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AGTAT
Questão 21
Questão
The scientist(s) responsible for the discovery of bacterial transformation is (are)
Responda
-
Watson and Crick.
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Griffith.
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Avery.
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Franklin.
Questão 22
Questão
Which of the following does NOT describe the structure of DNA?
Responda
-
double helix
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nucleotide polymer
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contains adenine-quanine pairs
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sugar-phosphate backbone
Questão 23
Questão
What did Hershey and Chase's work show?
Responda
-
Genes are probably made of DNA
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Genes are probably made of protein.
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Viruses contain DNA but not protein.
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Bacteria contain DNA but not protein.
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