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

Auxins, Auxins Auxins are plant growth substances. The term Auxin us...

Auxins Auxins are plant growth substances. The term Auxin usually refers to a chemical compound called Indole Acetic Acid (IAA), which is the major natural auxin. In plan

#monocot and diocot seeds., can I know the difference between diocot and mo...

can I know the difference between diocot and monocot seeds in a plant

Artificial insemination, ARTIFICIAL INSEMINATION - Artificial insemi...

ARTIFICIAL INSEMINATION - Artificial insemination is a technique to make a female pregnant by artificially introducing semen into the vagina. Artificial insemination has

What is the cost-benefit relationship, What is the cost-benefit relationshi...

What is the cost-benefit relationship regarding sewage treatment as a method to fight water pollution? To treat sewage is much cheaper for society. The non treated sewage pollu

Define principle for estimation of cholesterol - lipids, Define Principle f...

Define Principle for Estimation of cholesterol - Lipids? Zlatkis and associates have evolved a method of quantitative determination of cholesterol based on a reagent containing

Procedure of the second interphase period, Q. What are the events that mark...

Q. What are the events that mark the end and the beginning of the second interphase period and what happens in the cell in this period? The second interphase period is the S, i

What are phenotypical & genotypical proportions in f1 & f2, According to th...

According to the Mendel's second law, in the crossing between homozygous individuals concerning two pairs of nonlinked alleles, AABB x aaBB, what are the phenotypical and genotypic

Korarchaeotes, what is the effect that korarchaeotes have on humans?

what is the effect that korarchaeotes have on humans?

Prevention and control of staphylococcal food poisoning, Q. Prevention and ...

Q. Prevention and Control of Staphylococcal food poisoning? Staphylococcal food poisoning can be prevented by: 1. Avoiding contamination of food with S. aureus. 2. Prev

Symptoms of dyspepsia, Q. Symptoms of dyspepsia? The life style modific...

Q. Symptoms of dyspepsia? The life style modification in terms of work schedules, eating behaviour like consuming meals when extremely tired, quitting alcohol and smoking would

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