Lysosomes, Biology

Assignment Help:

Lysosomes

  1. Lysosomes are small vesicles which are bounded by a single membrane & contain hydrolytic enzymes in the form of minute crystalline or semi crystalline granules of 5-8 nm.
  2. It is also known as Atom of the cell, Disposal unit, Suicidal bag, Lytic bags, Scavanger of the cell.
  3. Lysosome were first observed by Novikoff.
  4. Discovered by De Duve (1955) in liver cells and called it "Pericanalicular dense bodies"
  5. Novikoff called it Lysosome and he also gave the term GERL = GB + ER + Lysosome. Relation between golgi body, endoplasmic reticulum and lysosomes is known as GERL system.
  6. P. Matile (1964) discovered them in Neurospora. Lysosomes abundantly found in fungi.
  7. Pit and Galpin (1973) confirmed their presence in higher plant cells (Potato stem).
  8. With the exception of mammalian RBC they were reported from all animal cells.
  9. In majority of plant cells large central vacuole functions as Lysosome. So in higher plants lysosomes are less frequent.
  10. Periplasmic space - Space between cell wall and cell membrane in bacteria plays similar role.
  11. Lysosomes are spherical bag like structures (0.1-0.8 m) covered by single unit membrane. They are larger in phagocytes (0.8 to 2 m).
  12. Lysosomes are polymorphic cell organelles.

Related Discussions:- Lysosomes

Phylum sarcomastigophora - protozoan, Phylum Sarcomastigophora Locomo...

Phylum Sarcomastigophora Locomotory organelles - flagella, pseudopodia or both types, usually with one type of nucleus; typically no spore formation, sexual reproduction thro

Alkaline slant - carbohydrate utilization pattern test, Alkaline slant - Ob...

Alkaline slant - Observation for Carbohydrate Utilization Pattern Test Alkaline slant (red) and acid butt (yellow) with or without gas production - This indicates fermentation

Why do cells of the nephron tubules present, Why do cells of the nephron tu...

Why do cells of the nephron tubules present a great amount of mitochondria? The cells of the tubule wall have high number of mitochondria because lots of substances are resorbe

Digestive system - large intestine, LARG E INTESTINE - More wider. Arr...

LARG E INTESTINE - More wider. Arranged around small intestine in the form of ? . It is 1.5 m long. Villi & microvilli absent. It shows 3 parts Ceacum, colon & rectum.

Blood Vessels Assignment, If baroreceptors are primed to detect blood press...

If baroreceptors are primed to detect blood pressure changes and compensate for them, how is it that some patients suffer from chronic hypertension?

Define drug effects on carbohydrate metabolism, Define drug effects on Carb...

Define drug effects on Carbohydrate metabolism? Carbohydrate metabolism: Hypoglycemic drugs such as insulin and sulphonylureas are prescribed because of their ability to increa

Evolution of man, EVOLUTION OF MAN - Mammals evolved from primitive...

EVOLUTION OF MAN - Mammals evolved from primitive reptiles (therapsida) in Triassic period, about 210 million years ago. Mammals existed as inconspicuous group of small

x linked traits in humans, X-Linked Traits in Humans Let us first exam...

X-Linked Traits in Humans Let us first examine traits determined by genes on the X-chromosome, or the X-linked traits. The human X chromosome contains many genes that are requi

Modalities available for sterilization, Modalities Available for Sterilizat...

Modalities Available for Sterilization The most accepted methods of sterilization can be classified as follows: Physical Agents: These comprise of: Sunlight Drying

What is glycolysis in cell metabolism, What is Glycolysis in Cell Metabolis...

What is Glycolysis in Cell Metabolism? Glycolysis :  is the process that breaks down glucose into pyruvate and energy. Glycolysis does not require the presence of oxygen and

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd