Biology Definitions A Level Wjec 103 Correctly Answered Questions Latest Update

Decarboxylation {Ans: A reaction that involves the removal of a carboxyl group from a molecule, resulting in the production of CO2}Interspecific Competition {Ans: Between organisms of the different species}Respiration {Ans: Catabolic process involving a series of enzyme catalysed reaction in cells where energy rich respiratory substrates are broken down to release energy}Carciogen {Ans: A mutation that increases the chance of developing cancer}Plasmids {Ans: Circular loop of DNA in bacteria}Passive Immunity {Ans: The body receives antigens produced by another individual in passive immunity}Cleavage {Ans: Rapid cell devision of blastocyst moving down fallopian tube}Alleles {Ans: Alternative forms of the same gene}Metabolic Water {Ans: Water produced from the breakdown of food and its respiration}Antibody {Ans: Immunoglobulin produced by the body's immune system in response to antigens}Primary Succession {Ans: Succession that occurs in a habitat that had not previously been colonised e.g. bare rock after volcano}Succession {Ans: The gradual change from one community type to another}Viable Count {Ans: Counts only the living organisms}Pandemic {Ans: An epidemic occurring worldwide across international borders}Primary Productivity {Ans: The rate at which energy is converted by producers into biomass}Deme {Ans: Groups within a