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Chapter 11
DNA and the Language of Life
13
Biology
11th Grade
05/10/2010

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Term
Virus
Definition

Package of nucleic acid wrapped in a protein coat

  • reproduce by infecting a living cell w/ its genetic material

Term
Bacterlophage
Definition
virus that infects bacteria
Term
DNA (deoxyribonucleic acid)
Definition
where heritable genetic information is stored
Term
nucleotides
Definition

building blocks of nucleic acid monomers

  1. ring shaped sugars called deoxyribose
  2. phosphate group (1phosphate w/ 4oxygen atoms)
  3. nitrogen base

Term
pyrimidines
Definition

single-ring structures

  • T thymine
  • C cytosine

Term
purines
Definition

double-ring structures

 

  • A adenine
  • G guanine

 

Term
double helix
Definition
twisting shape where two strands of nucleotides intertwine.
Term
DNA replication
Definition

enzymes link nucleotides together to form daughter cells

[image]

Term
DNA polymerases
Definition
make covalent bonds between the nucleotides of the new DNA strand
Term
RNA (ribonucleic acid)
Definition

any nucleic acid whose sugar is ribose and not deoxyribose

  • has a nitrogenous base of uracil (U) that paris w/ adenine
  • forms single strand

Term
transcription
Definition
DNA's nucleotide sequence converts to single-stranded RNA
Term
translation
Definition

converts nucleic acid to amino acid

  • based on codons

Term
codon
Definition

three bases that code one amino acid

  • several form polypeptide

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