Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
|
Why does intracellular conpartmentation facilitate cellular growth and development? SQ
|
Spacial separation of biochemical reactions that allows optimized conditions for metabolic processes (eg: pH, cofactors)
Localization of processes in a cell, morphological cell differentiation Sequestration of bio-molecules and toxic inorganic ions or molecules |
|
|
Which important processes take place in the chloroplast? SQ
|
phtosynthsis, carbon fixation, oxygen release
|
|
|
What important processes take place in the mitochondria? SQ
|
respiratory ATP biosyntheses, citric acid cycle
|
|
|
What important processes take place in the nucleus? SQ
|
transcription, gene expression
|
|
|
What important processes take place in the endoplasmic reticulum? SQ
|
Protien modification and processing (rough ER)
Lipid biosynthesis and membrane assembly (smooth ER) |
|
|
What structure or organelles differnetiate to plant from animal cells? SQ
|
Plant have cell walls (rigid cell borders, cellulse)
Plants have a centa vacuole (sequestation of catabolites, toxins) Plants have peroxisomes (lipd degredation) Plants have chloroplasts (photosynthesis,carbon fixation) |
|
|
What are the functions of plasmodesmata? SQ
|
Intracellular communication, facilitating long distance transport
|
|
|
What are the requirements for the concept of cellularity? SQ
|
cell walls and cell membranes confine borders of individual cells.
Functional independence. Energy use, information content and deciphering capacity, reproduction. |
|
|
Name three function of the central vacuole in plant cells. SQ
|
Storage of molecules (ions, organic acids, sugars, enzymes, pigments, and secondary metabolites)
Accumulation of water that causes cell expansion Osmotic solute accumulation that causes turgor pressure to facilitate cell expansion |
|
|
What is the evidence that chloroplasts and mitochondria are of endo symbiontic origin? SQ
|
Chloroplasts and mitochondira have genomes (DNA) and ribosomes, and sequence structure of these molecules have high similarity to bacteria.
Chloroplasts and mitochondira develop independently of cell division. Chloroplasts and mitochondria contain two membranes for which lipid composition resembles that of bacterial membranes |
|
|
Describe the structure of a typical bio-membrane. Mention its important building blocks. SQ
|
Bio-membranes are bi-layers of lipids with proteins that are either attached (Anchored) or inserted into the membrane
|
|
|
How are aqueous cytoplasm and cell outside separated by bio-membranes? which feature of the membrane makes this functional separation possible? SQ
|
The bi-layered structure of bio-membranes allow to create two hydrophobic surfaces which effectively separate aqueous phases.
|
