Random Flashcards
What is the role of RNA
Transfers genetic information from DNA to ribosomes for protein synthesis
What is the genetic code
The order of bases on DNA. Consists of codons
What is a gene?
a sequence of bases on a DNA molecule that codes for specific sequence of amino acids to make a polypeptide. Can also code for functional RNA.
What is an allele?
different versions of the same gene, found at the same locus on a chromosome
What is the genome?
The complete set of genetic information contained in the cells of an organism
What is the proteome?
The complete set of proteins that can be produced by a cell.
What are benefits of using mRNA over DNA?
shorter and contains urcil= breaks down quickly so no excess polypeptide forms
single-stranded and linear= ribosome moves along strand and tRNA. binds to exposed bases
contains no introns
What are the advantages of courtship behaviour?
individuals can recognise sexually mature members of their own species of the opposite sex, synchronise mating, from a pair bond and successfully breed
Define classification
the process of arranging organisms into groups
what is the classification system?
D K PLEASE CALL OLLIE FOR GAMING SPECIAL
What is a phylogenetic classification?
process of arranging organisms into groups based on their evolutionary origin and relationships
Why is water significant to living organisms?
solvent for polar molecules during metabolic reactions
enables organisms to avoid fluctuations in core temps
cohesion-tension fo water molecules in transpiration stream
What is the role of hydrogen ions in the body?
H+ ions interact with h-bonds and ionic bonds in tertiary structures of proteins, which can cause them to denature
Whats the role of DNA in living cells?
Base sequence of genes codes for functional RNA and amino acid sequence of polypeptides
Genetic information determines inherited characteristics = influences structure and function of organisms
Structure of DNA to its functions
sugar-phosphate backbone and many h bonds provides stability
long molecule stores lots of info
helicopter is compact for storage in nucleus
base sequence of triplets codes for amino acids
double stranded for semi-conservative replication
complementary base pairing for accurate replication
weak h bonds break so strands separate for replication
