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49 Cards in this Set

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The specific region of an enzyme to which the substrate or substrates bind.
Allele
A specific form of a gene, occupying the same gene locus as other alleles of that gene, but differing from other alleles by small differences in its base sequence.
Autotroph
Organisms that use an external source of energy(light or chemical) to synthesise organic compounds from inorganic substances.
Carrier
An individual that has a recessive allele of a gene.
Carrying capacity
The maximum population size that can be supported by the enivornment.
Cell respiration
Release of energy in the form of ATP from the controlled breakdown of organic compounds within the cell.
Clone
A group of genetically identical organisms or a group of cells derived from a single parent cell.
Codominant alleles
Pairs of alleles that both affect the phenotype when present in the heterozygous state.
Community
A group of population living and interacting with each other in an area.
Degenerate
Having more than one base triplet code for one amino acid.
Denaturation
A structural change in a protein that results in a loss (usually permanent) of its biological properties.
Detritivore
Organisms that feed on dead organic matter by ingesting it.
Diffusion
THe passive movement of a substance from a region of high concetration to a region of low concentration.
Dominant allele
An allele that has the same affec on the phenotype when in either the homozygous or heterozygous state.
Ecology
The study fo relationships between living organisms and between living organisms and their environment.
Ecosystem
A community and its abiotic environment
Enzyme
Globular protein capable of catalysing a specific chemical reaction.
Evoultion
The process of cumulative change in the heritable characteristics or a population.
Excretion
Removal from the body of waste products of metabolis.
Gene
A heritable factor that controls a specific characteristic.
Gene mutation
A change in the sequence of bases in a gene.
Genetic screening
Testing an individual for the presence or absence of an allele.
Genome
The whole of the genetic information of an organism.
Genotype
The alleles possessed by an organism.
Habitat
The environment in which a species normally lives or the location of a living organism.
Heterozygous
Having two different alleles at a gene locus.
Heterotroph
Organism that obtains its energy from organic molecules that it has consumed.
Homologous chromosomes
A pair of chromosomes with the same genes but not necessarily the same alleles of those genes.
Homozygous
Having two identical alleles at a gene locus.
Locus
The specific position on a homologous chromosome of a gene.
Organelle
A discrete structure within a cell that carries out a specific function.
Organic
Compounds containing carbon found in organims (Excluding hydrogencarbonates, carbonates, and oxides of carbon).
Organ
A group of tissues that form a single structure and which work together to carry out a function.
Organ system
A group of organs that work together to carry out a function.
Osmosis
The passive movement of water molecules across a partially permeable membrane from a region of lower solute concetration to a region of higher solute concetration.
Pathogen
An organism or virus that causes a disease.
Phenotype
The characteristics of an organism.
Population
A group of organisms of the same species that live in the same area at the same time.
Random sample
A sample of a population in which every individual has an equal chance of being selected.
Recessive allele
An allele that only has an effect on the phenotype when it is homozygous state.
Saprotroph
Organism that feeds of on dead organic matter by secreting digestive enzymes onto it and absorbing the products of digestion.
Sex Linkage
The pattern of inheritance characteristics of genes located on the se chromosomes.
Species
A group of organisms that can interbreed to produce fertile offspring.
Test cross
Testing a phenotypically dominant phenotype to determine if it is heterozygous or homozygous.
Tissue
A group of similar cells organised into a functional unit.
Trophic level
The position of an organism in a food chain.
Universal
Found in all organisms
copulation
biological term for sexual intercourse; the act of inserting the penis into the vagina
Fertilization
The fusion of the sperm and the egg to form a zygote.