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Bio 102 - Quiz #1 Review

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Bio 102 - Quiz #1 Review

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Each DNA nucleotide is composed of ____

a five-carbon sugar, a phosphate group, and one of four nitrogenous bases

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36 questions
Each DNA nucleotide is composed of ____
A five-carbon sugar, a phosphate group, and one of four nitrogenous bases
Which statement describes a difference between meiosis I and meiosis II?
Homologous chromosomes separate during meiosis I; sister chromatids separate during meiosis II.
Homologous chromosomes ____
Contain a maternal and paternal chromosome
After the first meiotic division, the two daughter cells ____
Have half the diploid number of chromosomes
How are purines distinguished from pyrimidines?
Purines are derived from a pair of fused C-N rings, while pyrimidines are derived from a single C-N ring.
Nondisjunction during meiosis I results in ____.
One pole of the cell receiving neither member of a homologous pair of chromosomes
Mitotic spindle disassembles
Duplicated chromosomes condense
Chromosomes align at the center of the cell
Sister chromatids are pulled to opposite spindle poles
RNA synthesis shuts down
Daughter chromosomes decondense and the nuclear envelope reforms
Nuclear envelope disappears
Prophase (also)
Spindle fiber begins to form
Which statement describes a similarity between meiosis and mitosis?
DNA is replicated only once in both processes
The daughter cells produced by meiosis are ____
Genetically different from the parent and each other
Hershey and Chase
Showed that the genetic material of bacteriophage T2 is DNA
Watson and Crick
Worked out the double helix model for DNA structure
Meselson and Stahl
Showed that DNA replication in Escherichia coli is semiconservative
Avery, MacLeod, and McCarty
Showed that DNA is the transforming principle responsible for transforming nonvirulent Streptococcus pneumoniae into a virulent strain
Showed that a transforming principle from heat-killed S strain Streptococcus pneumoniae could be used to make the R strain virulent