BIO 100 EXAM 1 SDSU 2025
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
Cell theory - ANSWERS-all living organisms are made up of one or more cells
QUESTION 2
Difference between pro/eukaryotes - ANSWERS-Euk: nucleus/organelles. pro: no
nucleus, free DNA
QUESTION 3
major structures of prokaryotic cells - ANSWERS-DNA- one or more circular
loops
ribosomes - protein synthesis
plasma - cell membrane
cell wall - keeps them from drying out, keeps them alive
pili - hair like structures, that help them stick on to things
flagellum -helps them with motion
cytoplasm - jello-like fluid inside cell
END OF
PAGE 1
, BIO 100 EXAM 1 SDSU 2025
QUESTION 4
Know how scientists believe prokaryotes gave rise to eukaryotes. - ANSWERS-
Endosymbiosis & Invagination
QUESTION 5
Endosymbiosis - ANSWERS-origin of chloroplast and mitochondrion
Cell eats or engulfs others then that prokaryote evolves into organelle
evidence: Eukaryotic chloroplast and mitochondrion are:
Similar in size to prokaryotes.
Have own DNA.
Have own internal ribosomes.
Surround by double membrane
QUESTION 6
Invagination - ANSWERS-Cell forms into itself and inner organelles are formed
QUESTION 7
Plasma Membrane structure - ANSWERS-found in pro/eukaryotes
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PAGE 2
, BIO 100 EXAM 1 SDSU 2025
phospholipid bi layer, proteins, carbs, and lipids embedded in the bilayer
Hydrophilic: head
hydrophobic: tail
QUESTION 8
Plasma Membrane & functions of Macromolecules - ANSWERS-carbohydrates:
"finger prints" for recognition by other cells, communication/sign/identifier
cholesterol: lipids keep membrane flexible
proteins: transport, receptor of chemical messages, enzyme, recognition by other
cells.
QUESTION 9
selective permiability - ANSWERS-A membrane that is permeable to only certain
molecules and not to all molecules
QUESTION 10
diffusion - ANSWERS-(movement of molecule from a region of high
concentration to one of low concentration)
END OF
PAGE 3
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
Cell theory - ANSWERS-all living organisms are made up of one or more cells
QUESTION 2
Difference between pro/eukaryotes - ANSWERS-Euk: nucleus/organelles. pro: no
nucleus, free DNA
QUESTION 3
major structures of prokaryotic cells - ANSWERS-DNA- one or more circular
loops
ribosomes - protein synthesis
plasma - cell membrane
cell wall - keeps them from drying out, keeps them alive
pili - hair like structures, that help them stick on to things
flagellum -helps them with motion
cytoplasm - jello-like fluid inside cell
END OF
PAGE 1
, BIO 100 EXAM 1 SDSU 2025
QUESTION 4
Know how scientists believe prokaryotes gave rise to eukaryotes. - ANSWERS-
Endosymbiosis & Invagination
QUESTION 5
Endosymbiosis - ANSWERS-origin of chloroplast and mitochondrion
Cell eats or engulfs others then that prokaryote evolves into organelle
evidence: Eukaryotic chloroplast and mitochondrion are:
Similar in size to prokaryotes.
Have own DNA.
Have own internal ribosomes.
Surround by double membrane
QUESTION 6
Invagination - ANSWERS-Cell forms into itself and inner organelles are formed
QUESTION 7
Plasma Membrane structure - ANSWERS-found in pro/eukaryotes
END OF
PAGE 2
, BIO 100 EXAM 1 SDSU 2025
phospholipid bi layer, proteins, carbs, and lipids embedded in the bilayer
Hydrophilic: head
hydrophobic: tail
QUESTION 8
Plasma Membrane & functions of Macromolecules - ANSWERS-carbohydrates:
"finger prints" for recognition by other cells, communication/sign/identifier
cholesterol: lipids keep membrane flexible
proteins: transport, receptor of chemical messages, enzyme, recognition by other
cells.
QUESTION 9
selective permiability - ANSWERS-A membrane that is permeable to only certain
molecules and not to all molecules
QUESTION 10
diffusion - ANSWERS-(movement of molecule from a region of high
concentration to one of low concentration)
END OF
PAGE 3
