IB Biology Topic 1 Written Exam Questions Correctly Answered.
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Course
Ib biology
Institution
Ib Biology
IB Biology Topic 1 Written Exam Questions Correctly Answered.
Cell Theory - CORRECT ANSWER 1. All living things are composed of cells
2.The Cell in the fundamental unit of life
3. Cells only arise from pre-existing cells
Striated Muscle - CORRECT ANSWER Long Cells, (300 mm), multiple nuc...
IB Biology Topic 1 Written Exam
Questions Correctly Answered.
Cell Theory - CORRECT ANSWER 1. All living things are composed of cells
2.The Cell in the fundamental unit of life
3. Cells only arise from pre-existing cells
Striated Muscle - CORRECT ANSWER Long Cells, (300 mm), multiple nuclei, questions cell theory
Acetate Fungal Hyphae - CORRECT ANSWER challenges idea that cell is a single unit, multi-nucleated,
and continuous cytoplasm. Cell walls composed of Chitin
giant algae - CORRECT ANSWER challenges that notion that cells must be small, and simple in structure.
Size of 5-100mm and complex in form.
response - CORRECT ANSWER Living things can respond to and interact with the environment
Homeostasis - CORRECT ANSWER The maintenance and regulation of internal cell conditions, e.g. water
and pH
Growth - CORRECT ANSWER Living things can grow/change
excretion - CORRECT ANSWER removal of metabolic waste
reproduction - CORRECT ANSWER living things produce offspring, sexually or asexually
nutrition - CORRECT ANSWER feeding by either the synthesis of organic molecules (e.g. photosynthesis)
or the absorption of organic matter
, SA to Volume Ratio - CORRECT ANSWER A larger SA:Vol ratio can mean that a cell can act more
efficiently. For every unit of volume that requires nutrients or produces waste. There is more membrane
to serve it
How to maximize SA to Vol ratio? - CORRECT ANSWER Cells divide, They use membranes to carry out
processes, organs will fold up to maximize the ratio
Rate of Metabolism - CORRECT ANSWER a function of mass/volume
emergent properties - CORRECT ANSWER when things are added more properties arise
specialized cells - CORRECT ANSWER All specialized cell and the organs constructed are from
differentiation
Stem Cells - CORRECT ANSWER unspecialized cells that can differentiate into many cell types -
Embryonic - Cord Blood - Adult (bone marrow)
Totipotent - CORRECT ANSWER Can differentiate into any cell
pluripotent - CORRECT ANSWER Can differentiate into many cells
multipotent - CORRECT ANSWER can differentiate into a few closely related cells
unipotent - CORRECT ANSWER Can regenerate,but only into associated cell type
Stagardt's Macular Distrophy - CORRECT ANSWER A recessive condition for the eyes, stem cells are
treated to become retinal cells. Cells attach to the retina and improves central vision
Lukemia - CORRECT ANSWER Hematopoietic Stem Cells (HSCs) are harvested from bone marrow,
peripheral blood or umbilical cord blood
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