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Unit 4 Flashcards
unit 4 voacb quiz words/definitions
16
Biology
11th Grade
11/14/2010

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Term
Nucleoticde
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 seperates DNA strands
Term
Primase
Definition
starting place of replication
Term
DNA polymerase
Definition

an enzyme that catalyzes the formation of the DNA molecule

 

Term
Ligase
Definition

enzyme 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
a cell that contains 2 haploid sets of chromosomes
Term
Sexual Reproduction
Definition
reproduction when gamets from 2 parents unite
Term
Asexual Reproduction
Definition
reproduction that does not involve the union of gametes and a singular paretn reproduces, the offspring is genetically identical to the parent
Term
Prophase
Definition
the first phase in 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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