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MCB150 Exam Questions and Answers 100% Solved | Graded A+

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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...

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  • October 5, 2024
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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 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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