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Biology - Chapter 12

Terms in this set (9)

1. The process by which one strain of bacterium is changed into another strain is called...
A). transcription
B). transformation
C). duplication
D). replication
B). transformation
2. Bacteriophages are...
A). a form of bacteria
B). enzymes
C). coils of DNA
D). viruses
D). viruses
3. Which of the following researchers used radioactive markers in experiments to show that DNA was the genetic material in cells?
A). Frederick Griffith
B). Oswald Avery
C). Alfred Hershey and Martha Chase
D). James Watson and Francis Crick
C). Alfred Hershey and Martha Chase
4. Before DNA could definitely be shown to be the genetic material in cells, scientists had to show that it could...
A). tolerate high temperatures
B). carry and make copies of information
C). be modified in response to environmental conditions
D). be broken down into small subunits
B). carry and make copies of information
9. A nucleotide does NOT contain...
A). a 5-carbon sugar
B). an amino acid
C). a nitrogen base
D). a phosphate group
B). an amino acid
10. According to Chargaff's rule of base pairing, which of the following is true about DNA?
A). A=T and C=G
B). A=C and T=G
C). A=G and T=C
D). A=T=C=G
A). A=T and C=G
11. The bonds that hold the two strands of DNA together come from...
A). the attraction of phosphate groups for each other
B). strong bonds between nitrogenous bases and the sugar-phosphate backbone
C). weak hydrogen bonds between nitrogenous bases
D). carbon-to-carbon bonds in the sugar portion of the nucleotides
C). weak hydrogen bonds between nitrogenous bases
19. In eukaryotes, nearly all the DNA is found in the...
A). nucleus
B). ribosomes
C). cytoplasm
D). histones
A). nucleus
21. The main enzyme involved in linking individual nucleotides into DNA molecules is...
A). DNA protease
B). ribose
C). carbohydrase
D). DNA polymerase
D). DNA polymerase
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