Double helix the form assumed by dna in living cells

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: type of segments between chromaDds of homologous chromosomes during prophase I of meiosis. Allergies- an abnormal sensiDvity to an anDgen. Symptoms are triggered by histamines released from mast cells. Allergen- an otherwise harmless anDgen that causes an allergic reacDon. Autoimmune diseases- an immunological disorder in which the immune system improperly aMacks the body’s own molecules. Immunodeficiency diseases- an immunological disorder in which the immune system lacks one or more components if the immune system, making the body suscepDble to infecDous agents that would not ordinarily cause a problem. Chapter 10 vocabulary Molecular biology- the study if the molecular basis of heredity; molecular geneDcs. NucleoDdes- an organic monomer consisDng if a five- carbon sugar covalently bonded to a nitrogenous base and a phosphate group. NucleoDdes are the building blocks of nucleic acids. PolynucleoDde- a polymer made up of many nucleoDdes covalently bonded together. Sugar- phosphate backbone—the alternaDng chain of sugar and phosphate to which DNA and RNA nitrogenous bases are aMached. DNA- deoxyribonucleic acid. The geneDc material that organisms inherit from their parents; a double stranded helical macromolecule consisDng of nucleoDde monomers with deoxyribose sugar , a phosphate group, and the nitrogenous bases adenine (A), cytosine (C), guanine (G), and thymine (T). Double helix- the form assumed by DNA in living cells, referring to its two adjacent polynucleoDde strands wound into a spiral shape. Codon- a three- nucleoDde sequences in mRNA that specifies a parDcular amino acid or polypepDde terminaDon signal; the basic unit of the geneDc code. DNA polymerases- an enzyme that assembles DNA nucleoDdes into polynucleoDdes using a preexisDng strand of DNA as a template. GeneDc code- the set of rules giving the correspondence between nucleoDde triplets (codons) in mRNA and amino acids in protein. RNA polymerase- an enzyme that links together the growing chain of RNA nucleoDdes during transcripDon, using a DNA strand as a template. Promoter- a specific nucleoDde sequence in DNa, located at the start of a gene, that is the binding site for RNA polymerase and the place where transcripDon begins. Terminator- a specific sequence of nucleoDdes in DNA that marks the end of a gene. It signals RNA polymerase to release the newly made RNA mole...
View Full Document

This document was uploaded on 03/02/2014 for the course BIO 101 at University of Tennessee.

Ask a homework question - tutors are online