Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Ribosomes: are minute nonmembranous and dense spheroidal particles or granules. First observed by electron microscopy by palade 1955. Being only about 200 to 250 a in diameter these are smallest, but most abundant of all cytoplasmic organelles. Every cell contains several thousands to millions of ribosomes. Most of these are linked at the surface of endoplasmic reticulum many are free in the cytosol, and some are found in the in the nucleus and mitochondria also in chloroplasts of plant cells.
Structurally. Each ribosome has two parts a proximal larger subunit linked to the endoplasmic are composed of RNA and proteins approximately in equal amounts. The ribosomal RNA ( rRNA) has only four macromolecules . Three in the larger subunit and one the smaller subnuits. Considerable portion of these RNA molecules secondarily become double stranded due to intermolecular the intermolecular base pairing so that the molecules become 3 dimensional .The ribosomal protein include 73 macromolecules 40 in large in 33 in small subunits .
Ribosomal subunits are assembled from their component r RNA and protein molecules in the nucleolus of nucleus. These are of the four r RNA molecules are synthesized in the nucleolus . The fourth is synthesized by some chromosome outside the nucleolus. This and the 73 protein molecules synthesized in the cytoplasm migrate to the nucleolus for being incorporated in ribosomal subunits. The latter diffuse out into the cytoplasm and assemble to form ribosome's most of which link the endoplasmic reticulum.
What are the plant tissues that constitute the functional structures of the leaf veins? Leaf veins are made of vascular tissues. They are constitute by xylem and phloem that re
Define Criteria for Assessment of Vitamin K Status? The parameters of blood clotting time and prothrombin time are used as criteria to assess vitamin K status as this vitamin
Q How does the amoeboid movement occur and what are examples of beings and cells that use such movements for locomotion? Amoeboid movements are created by cytoplasmic movements
describ ethe genral characters of phylum colentrata
what protist changes shape constantly and flows around its food to engulf it?
Tetrasporic Embryo Sacs In this group neither of the meiotic divisions is accompanied by wall formation so that at the end of meiosis all the four haploid nuclei remain in a
DISORDERS OF LIVER: In the foregoing sections and sub-sections we have discussed about the common disorders of upper and lower gastrointestinal tract. Now we shall discuss
Q. How can the blood coagulation (clotting) process be described? Blood clotting encompasses a sequence of chemical reactions whose respective products are enzymes that catalyz
Define the role of Fluorine in Human Body? Fluorine is potentially a toxic element. Its essentiality for humans is not established although the role of fluoride in providing pr
Male reproductive system of earthworm: Testis : There are two pairs of testis one on eachside of the body in 10th and 11th segments. They produce sperm mother cells. Seminal Ves
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd