MCB150 Exam Questions and Answers 100% Solved | Graded A+
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Course
MCB150
Institution
MCB150
MCB150 Exam Questions and Answers
100% Solved | Graded A+
Nucleoid - Prokaryotes have these, this is where their genetic
material is found. eukaryotes don't have these.
cytoplasmic membrane - Plasmic membrane
every cell has one
genetic material of a eukaryote resides in the - nucleus
The clo...
Nucleoid - ✔✔Prokaryotes have these, this is where their genetic
material is found. eukaryotes don't have these.
cytoplasmic membrane - ✔✔Plasmic membrane
every cell has one
genetic material of a eukaryote resides in the - ✔✔nucleus
The closer Rnas they match, the two organisms more likely have an
ancestor together. - ✔✔
the Archaea are genetically closer related to the eukarya then to the
bacteria, although archaea and bacteria both prokaryotes. the archaea and
bacteria do look alike, though. structurally, - ✔✔
Basic tenets of the cell theory: - ✔✔1. Cell is fundamental unit of life.
2. All organisms are composed of cells.
3. all cells come from preexisting cells.
Cells are small... Why? - ✔✔As the size increases, the surface area to
volume ratio decreases!
,**
Smaller you are, less volume you have, less reactions you can maintain.
transmission electron miscrospy - ✔✔thin section of material that u can
look very closely at.
scanning electron microscopy - ✔✔not as close of a look, but gives a 3d
Look.
electron microscopy. - ✔✔darker images mean denser material
Light images mean less dense material!
Cells (plants, most prokaryotes) have a cell wall. - ✔✔Rigid, cell wall.
Provides shape and protection.
Every cell is surrounded by a plasma membrane. - ✔✔--Allows cells to
maintain a constant internal environment.
--acts as a selectively permeable barrier.
--is an interference for cells where info is received from adjacent cells and
extracellular signals.
-has molecules that are responsible of binding and adhering to cells.
,some bacteria have Capsules - ✔✔thick layer of carbs and proteins.
extra protection from the outside of a cell.
--allows to stick to other cells
-Even if they possess a capsule, bacteria does NOT rely on the capsule for
survival!
**non essential, but does have an advantage.
- ✔✔
Difference from bacteria and archaea: - ✔✔Bacteria have
PEPTIDOGLYCAN in their cell wall.
In lateral gene transfer, genes are ______. - ✔✔moved from one
species to another
Eukaryotic cells are much larger than bacteria and archaea! -
✔✔Prokaryotic cells measure 1-10 micrometer in diameter.
Eukaryotic cells measure 5-100 micrometer in diameter.
Benefits of compartmentalization..... - ✔✔Incompatible chemical rxns
can be separated!
Chemical reactions become more efficient.
, Difference between Prokaryotic cells and Eukaryotic cells. - ✔✔1.
Eukaryotic chromosomes are found inside a membrane-bound
compartment called the NUCLEUS!
2. Eukaryotic cells are LARGER than the prokaryote.
3. Eukaryotic cells contain extensive amounts of internal membrane.
4. Eukaryotic cells feature a diverse and dynamic cytoskeleton.
Cytosol - ✔✔The fluid portion between the plasma membrane and
organelles.
Nucleus: - ✔✔-contains the chromosomes
- functions as an administrative center for info storage and processing.
-biggest and most organized.
enclosed by a unique structure, called the nuclear envelope. Complex
double membrane.
Nuclear Lamina - ✔✔Nuclear envelope in the nucleus has this..
Pore-like openings, inside surface is linked to fibrous proteins that form a
lattice like sheet
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