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
Light Requirement - Seed Dormancy The light requirement for germination of many seeds is presumably a mechanism that prevents the germination of small seeds buried deep underg

What are the main divisions and representing species of the gymnosperms? This group of plants can be divided into conifers (pine, sequoia, cypress), that have flowers known as

Explain what is Fern Allies - Lycopophyta ? Fern allies are those groups of vascular (with conducting vessels) plants that have close ties to the ferns. Sometimes they are refe

Define Urinary Excretion Test - Thiamin Status? The urinary excretion of thiamin is an index of recent dietary intake of the vitamin. Hence, determination of thiamin in urine s

Epilimnion - Summer Stratification This forms the upper layer of the lake and consists of freely- circulating warm water which is well lighted though poor in nutrients. Most o

Diabetes Mellitus in the World As per the International Diabetes Federation Directory, in 1994 the global burden of the disease was estimated at 110 million. These cases will i

Why is the cytoplasm of sperm cells very reduced? Why do mitochondria of sperm cells concentrate in the base of the flagellum ? The decreased cytoplasm of sperm cells reduces th

i need information about speen of animals and stuff like that for example a cheetah speed

If children obtain half their genes from one parent and half from the other parent, why aren't siblings identical?

What is xaxim? Most pteridophytes have subterraneous stems similar to the substrate called as rhizomes. Xaxim is a kind of pteridophyte with an aerial stem in generally perpend