what is the sum total of genetic material of a cell (chromosomes + mitochondria/chloroplasts and plasmids)
genome
what is the genome of cells
DNA
what is the genome of viruses
DNA and RNA
what are DNA complexed with protein constitutes the genetic material
chromosomes
what chromosomes are a single circular loop
bacterial genome
what chromosomes are multiple and linear
eukaryotic genome
what are chromosomes subdivided into that are the fundanmetal unit of heredity responsible for a given trait
genes
what is the site on the chromosome that provides information for a certain cell function
gene
what is the segment of DNA that contains the necessary code to make a protein or RNA molecule
gene
what are the three basic categories of genes
1. genes that code for proteinsÂ
2. genes that code for RNA
3. genes that control gene expression
what are the genes that code for proteins
structural genes
what are the genes that control gene expression
regulatory genes
what are all types of genes constitute the genetic makeup
genotype
what are the expression of the genotype creates observable traits
phenotype
what are two strands twisted into a double helix
DNA
what is the basic unit of DNA structure
nucleotide
what are the three parts the each nucleotide contains
1. 5 cardon sugar - deoxyriboseÂ
2. a phosphate group
3. a nitrogen base - adenine, guanine, thymine, cytosine
what covalently bond to form a sugar-phosphate backbone
nucleodtides
what covalently bond to the 1` carbon of each sugar and span the center of the molecule to pair with an appropriate complementary base on the other strand
nitrogenous bases
_____ binds to ____ with 2 hydrogen bonds
adenine and thymine
___ binds to ____ with 3 hydrogen bonds
guanine and cytosine
each strand provides a template for the exact copying of a new strand. order of bases constitutes the DNA code
information in DNA
what significance of DNA structure is constancy of base pairing guarantees that the code will be retained
maintenance of code during reproduction
what significance of DNA structure order of bases responsible for unique qualities of each organism