Key terms

Description

Flashcards for biological definitions relating to the OCR A-level biology specification.
Emily Rowland-Rawson
Flashcards by Emily Rowland-Rawson, updated more than 1 year ago
Emily Rowland-Rawson
Created by Emily Rowland-Rawson about 6 years ago
4
0

Resource summary

Question Answer
osmosis The net movement of water molecules from a higher water potential to a lower water potential through a semi-permeable membrane.
hypotonic solution where there is a greater concentration of solutes inside the cell than outside
hypertonic solution where there is a greater concentration of solutes outside the cell than inside
isotonic solution where the concentration of solutes is equal inside the cell and outside
dependant variable is the one that you measure, it depends on the independent variable
independent variable is the one that you change
flaccid a plant cell that is limp (has lost water)
turgid a plant cell that is fully inflated with water
plasmolysed a plant cell that has lost water, causing the cell membrane to pull away from the inside of the cell wall
crenation shrinking an animal cell by osmosis
lysis bursting an animal cell by osmosis
angiosperms flowering plants
gymnosperms conifers
1 millimeter = 1000 micrometers
1 micrometer = 1000 nanometers
reducing sugar any sugar that is capable of acting as a reducing agent because it has a free aldehyde group or a free ketone group
interspecific and intraspecific variation interspecific is between different species intraspecific is within a species
continuous and discontinuous variation continuous is a measurable value (height) discontinuous is categorised data (colour)
mitosis (name and explain the stages)
meiosis cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores
active and passive immunity active is when the immune system produces it's own antibodies, passive is when antibodies are transferred from an outside source
endocytosis and exocytosis endocytosis is bringing substances into the cell (pinocytosis and phagocytosis) exocytosis is secreting membrane-bound vesicles of molecules out of the cell
phagolysosome a combined phagosome and lysosome formed during phagocytosis
opsonin chemicals the bind to pathogens so they can be more easily recognised by phagocytes
phagosome a vacuole enclosing a pathogen that has been engulfed by a phagocyte
cytolosis bursting of a animal cell caused by a hypotonic solution
erythrocytes red blood cells
neutrophils a type of white blood cells that form an essential part of the innate immune system
intra inter intra in within inter is between
etiolation plants having long, weak stems and a pale yellow colour caused by skotomorphogenesis (the development of seedlings in the dark)
chlorosis yellowing of leaves of plants, caused by iron or magnesium deficiency or other factors
rare and common blood types AB negative is the rarest O positive is the most common
apoptosis a form of programmed cell death that occurs in multicellular organisms.
macromolecule a very large molecule like a protein commonly composed of monomers
Show full summary Hide full summary

Similar

Ecosystems
Jessica Phillips
BIOLOGY HL DEFINITIONS IB
Luisa Mandacaru
Cell Transport
Elena Cade
Function and Structure of DNA
Elena Cade
Haemoglobin
Elena Cade
Biology AQA 3.1.3 Cells
evie.daines
Biology AQA 3.2.5 Mitosis
evie.daines
Biology AQA 3.1.3 Osmosis and Diffusion
evie.daines
Biology- Genes, Chromosomes and DNA
Laura Perry
Biology- Genes and Variation
Laura Perry
Enzymes and Respiration
I Turner