Differences between prokaryotic & eukaryotic cells, Biology

DIFFERENCES BETWEEN PROKARYOTIC & EUKARYOTIC CELLS

 

S.No.

 

CHARACTERS

 

PROKARYOTIC CELL

 

EUKARYOTIC CELL

 

1

 

Nuclear Membrane

Nuclear membrane absent (Prok. are single

membranous system)

Nuclear membrane present (Euk. are double

enveloped system

 

 

2

 

 

Nucleus

 

Well organised nucleus absent, thus nuclear material is called as Incipient nucleus/prokaryon/Genophore/nucleoid etc.

 

 

Nucleus well organized

 

3

 

Cell organnelles

Membranous cell organelles are absent (Mitochondria, plastids, E.R., golgibody, Microbody)

 

Membranous cell organelles are present. (Plastids only in plants)

4

Ribosome

70-S type

80-S type and 70-S (Mito. & chloroplast)

 

5

 

Cell wall

Present (made by peptidoglycan / Murein /

Muramic acid / Mucopeptide

Present inn plant cells only (made by

cellulose or chitin)

 

6

 

Resp. Enzymes

Present in mesosomes mainly or in cell membrane

 

Found in cytoplasm and mitochondria

 

7

 

Flagella

 

Flagella are single stranded, made up of flagellin protei

 

Flagella are eleven stranded, made up of tubulin protein (9+2 arrangement)

 

 

8

 

 

Photosynthesis

Takes place in thylakoids or lamellaes or chlorosomes in BGA (in bacteria chromatophores)

 

 

Chloroplast

 

9

 

Cyclosis

 

Cytoplasmic streaming absent

 

Present

 

 

10

 

 

Chromosomes

Naked or folded genome made by only circular-ds DNA (C-C type) (Histone protein absent)

 

True chromosomes & more than one

(Histone asso. with DNA) (DNA A-T type)

11

Cell division

Amitosis only

Mitosis & meiosis (R.D.) mainly

12

Ploidy level

Consider as haploid

Haploid, Diploid, Polyploid

 

 

13

 

 

Sexuality

Sexuality or true sexual reproduction absent in prokaryotic cell [In bacteria genetic- recombination or parasexual reproduction by conjugation transduction & transform)

 

Sexuality or sexual reproduction present (Meiosis, gamete formation & true fertilization occurs)

14

Vacuoles

Absent but gas vacuole may present

Present as sap vacuoles in plant cell.

 

15

 

Protein Synthesis

 

Takes place in cytoplasm

Transcription in nucleus & translation in cytoplasm on ribosome

 

 

Examples :-

Bacteria, Cyanobacteria (BGA) Mycoplasma (PPLO), ricketsias, Actinomycetes

 

All plant & animal cells including human cells.

Posted Date: 10/5/2012 3:30:00 AM | Location : United States







Related Discussions:- Differences between prokaryotic & eukaryotic cells, Assignment Help, Ask Question on Differences between prokaryotic & eukaryotic cells, Get Answer, Expert's Help, Differences between prokaryotic & eukaryotic cells Discussions

Write discussion on Differences between prokaryotic & eukaryotic cells
Your posts are moderated
Related Questions
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Question 1 How would you perform ABO blood grouping? Add a note on advantages and disadvantages of each method. Also discuss the precautions you may take to avoid errors in variou

Can you please describe the differences between continuous traits and discrete traits and how it helps an ecologist measure variation? Please give a few examples.

Derived Proteins These are not naturally occurring proteins and are obtained from simple proteins by the action of enzymes and chemical agents, heat, mechanical shaking, UV or

Define prevention of IDD - Communication Campaign? A mass communication campaign is needed to create awareness in the community about the consequences of IDD and the benefits o

In the hybridization of 2 genes (4 different alleles, 2 of each pair) how does epistasis affect the proportion of phenotypical forms in the F2 generation? In the dihybridism wi


Q. What is selective waste collection? The Recyclable waste is waste that can be reprocessed and used again. The waste recycling depends on the separation of the recyclable res

What is a pipette and how is it used? There are lots of types of pipettes (or pipette), but most are basically a fancier version of a medicine dropper or eye dropper. They are

Q. What is the significance of mitosis for the embryonic development? Every embryo grows from a single cell that bears mitosis and generates other cells that also divide themse