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Unit 4 Vocab
vocabulary
16
Biology
11th Grade
11/14/2010

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Term
Nucleotide
Definition
in a nucleic-acid chain, a sub-unit that consists of a sugar, a phosphate, and a nitrogenous base
Term
Replication
Definition
copying
Term
Helicase
Definition
an enzyme that separates DNA strands
Term
Primase
Definition
starting place of replication
Term
DNA polymerase
Definition
enzyme that catalyzes the formation of the DNA molecule
Term
Ligase
Definition
that joins the gaps of the synthesized strand of DNA together
Term
Mitosis
Definition
in eukaryotic cells, a process of cell division that forms two new nuclei, each of which has the same number of chromosomes
Term
Haploid
Definition
describes a cell, nucleous, or organism that has only one set of unpaired organisms
Term
Diploid
Definition
that contains two haploid sets of chromosomes
Term
Sexual Reproduction
Definition

reproduction in which gametes from two parents unite

Term
Asexual Reproduction
Definition

reproduction that does not involve the union of gametes and in which a single parent produces the offspring that are genetically identical to parent

Term
Prophase
Definition
the first stage of mitosis or meiosis in cell division, characterized by the condensation of the chromosomes and the dissolution of the nuclear envelope
Term
Metaphase
Definition
one of the stages of mitosis and meiosis, during which all of the chromosomes move to the cell’s equator
Term
Anaphase
Definition
a phase in mitosis and meiosis in which the chromosomes separate
Term
Telophase
Definition
final stage of mitosis and meiosis, during which a nuclear membrane forms around each set of new chromosomes
Term
Cytokinesis
Definition

the division of the cytoplasm of a cell; cytokinesis follows the division of the cell’s nucleous by mitosis or meiosis

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