IB Biology

Outline the cell theory. - ️️Living organisms are composed of cells. Cells are the smallest unit of life. Cells come from pre-existing cells. Discuss the evidence for the cell theory. - ️️The nature of scientific theories could be introduced here: the accumulation of evidence that allows a hypothesis to become a theory; whether a theory should be abandoned when there is evidence that it does not offer a full explanation; and what evidence is needed for a theory to be adopted or reje...

Organic compound - ️️A compound that contains carbon found in living organisms, excluding carbonates and oxides Enzyme - ️️Biological catalysts made of protein that speed up the rate of a reaction Active site - ️️The region of an enzyme where the substrate binds Denaturation - ️️A structural change in the 3-D shape of a protein causing the loss of its chemical properties Cell respiration - ️️The controlled release of enrgy from organic compiunds in cells to form A...

cell theory - ️️- all living things are composed of cells - the cell is the smallest unit of life - cells only arise from pre-existing cells challenges to the cell theory - ️️- *striated muscle* challenges the idea that a cell has one nucleus - *giant algae* challenges the idea that cells must be simple in structure & small in size - *aseptate fungal hyphae* challenges the idea that a cell is a single unit functions of life - ️️- metabolism - response - homeostasis - gro...

Cell Theory - ️️The theory that cells form the fundamental structural and functional units of all living organisms Unicellular - ️️A single celled organism Multicellular - ️️Made up of more than one cell. Prokaryotic - ️️A small single cell lacking a nucleus or any other membrane-bound organelles. Bacterial cells are an example Eukaryotic - ️️A cell characterized by the presence of a nucleus and other membrane-bound organelles. Eukaryotes can be unicellular (proti...

genotype - ️️the alleles of an organism phenotype - ️️the characteristic of an organism dominant allele - ️️an allele that has the same effect on the phenotype when present in both homozygous and heterozygous states co-dominant alleles - ️️pair of alleles that both affect the phenotype when present in a heterozygote recessive alleles - ️️an allele that only has an effect on the phenotype when in homologous state locus - ️️the particular position on homologo...

Which structures is found in all prokaryotic cells? - correct answer Ribosomes, Plasmid, Pili. (some only have Flagellum & Cell Wall) Features found in most plant and animal cells? - correct answer cytoplasm, mitochondria, ribosomes Size of the diameter for most cells is..? - correct answer 10 m to 100 m functions of a membrane protein? - correct answer Enzymatic activity, Channels, Cell-to-cell recognition, cell-structure, hormone binding sites. Why is the genetic code descr...

How do you calculate the magnification of a drawing/image? - correct answer Magnification=Image size(with ruler) / Actual size(according to scale bar) How do you calculate the actual size of a magnified specimen? - correct answer Actual size=Image size(with ruler) / magnification By which process do potassium ions move through potassium channels in axons? - correct answer Facilitated diffusion -at rest, the Na-K+ pump expels Na+ ions out of cell, while K+ are put within -when the n...

What are the characteristics common to all forms of life? - correct answer reproduction, carbon, responds to surroundings, Growth and Development, cellular organization, and energy What are the levels of biological organization from simple to most complex? - correct answer Molecules, cell, tissue, organ, organism, population, community, ecosystem, biosphere What are the 4 most common types of biological molecules? - correct answer Proteins, nucleic acids, carbohydrates, and lipids ...

Outline the cell theory. - correct answer Living organisms are composed of cells. Cells are the smallest unit of life. Cells come from pre-existing cells. Discuss the evidence for the cell theory. - correct answer The nature of scientific theories could be introduced here: the accumulation of evidence that allows a hypothesis to become a theory; whether a theory should be abandoned when there is evidence that it does not offer a full explanation; and what evidence is needed for a theory...