Growth & Genetic (1) Flashcards
Meristems
Regions of cell division in plants
Cambium
Lateral meristem in woody stems
Spring Xylem
Part of annual ring which has wide vessels with thin walls
Summer Xylem
Region of annual ring with narrow vessels with thick lignified walls
Annual Ring
Region of xylem in a woody stem representing 1 year’s growth
Growth pattern of an annual plant
Growth pattern of a perennial plant (tree)
Growth pattern of an insect
Growth pattern of a human
Mammals limited, angiosperms extensive
Extent of powers of regeneration in mammals and angiosperms
Regulator Gene
Codes for repressor protein
Repressor protein
Coded for by regulator gene and binds to operator in absence of lactose
Operator
Switches on structural gene
Structural Gene
Codes for galactosidase
Galactosidase
Enzyme coded for by structural gene and breaks down lactose
Saves energy and resources
Advantage to E.coli of gene action in lactose metabolism
Lactose
Inducer molecule in Jacob-Monod hypothesis
Metabolic Pathway
Series of reactions controlled by enzymes
Phenylketonuria (PKU)
Inability to metabolise phenylalanine due to a gene mutation
Genes being switched on or off
What controls cell differentiation?
Regions of cell division in plants
Meristems
Lateral meristem in woody stems
Cambium
Part of annual ring which has wide vessels with thin walls
Spring Xylem
Region of annual ring with narrow vessels with thick lignified walls
Summer Xylem
