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!
Flagellates - Parasitic Protozoan
Several flagellate protozoa parasitise man and live in the blood stream or tissues of the reticulo-endothelial system. Most significant of these are the species of the genus Leishmania and Trypanosoma. They all require two hosts in their life cycle; a blood- sucking insect transmits the infective stage of the parasite to the vertebrate host. These protozoans are elongated slender or sometimes rounded possessing a single flagellum at the anterior end. In certain intracellular states the flagellum may be absent. The flagellum arises from a basal body or kinetosome at the floor of a flagellar pocket that occurs at the anterior or near the posterior extremity of the body. In close approximation to the basal body lies a spherical, rod or disc-shaped structure, the kinetoplast. The kinetoplast represents an enormous mitochondrion and contains DNA within it.
It has been suggested that the kinetoplast (or the mitochondria1 DNA) is a metabolic organelle which is essential for the survival of the parasite in the insect intermediate host but is not required for the life of trypanosomes in the vertebrate host's blood. Figure the fine structure of a trypanosome as seen under the electron microscope. Most blood forms are long and slender but as they become intracellular or are taken up by the insect vector, a modification in their form may occur. Accordingly, during the life cycle, a trypanosome may, exhibit several polymorphic forms.
Figure: Trypanosomid flagellates
a) The structure of trypanosoma bruceib) Life cycle of trypanosoma brucei gambiense causal agent of African sleeping sickness.The flagellate is transmitted by the bite of the tsetse fly. C) Swollen lymph glands where the parasite resides.
Diploidy and Haploidy :: In the chromosomal complement given species not all the chromosomes are different from each other .In fact these are in pairs ,i.e. every two chrom
Polymorphism in Lysosomes Polymorphism, i.e. existence of a structure in more than one form, is an important feature of lysosomes. Several different forms of lysosomes have been
PHYLUM ECHINODERMATA Definition and Indroduction Bilateral and deuterostomial eucoelomate eumetazoa with rough , tough and leathery skin due to a dermal skeleton o
As a result of mutarotation, D-glucose exists in all of the following forms EXCEPT: Select one: a. L-glucopyranose. b. alpha-anomer. c. free aldehyde (linear) d. bet
What is Prokaryotic Gene Expression ? Control of prokaryotic gene expression occurs primarily at the level of transcription. Prokaryotic genes are arranged in units consisting
Why is maternal milk important for the immune protection of the baby? Besides being nutritionally significant, maternal milk participates in the defense of the baby against inf
what is a protein-to-protein interaction in other words what 2 proteins must be together for transcription to take place and what 2 proteins for replication?
What is Strobilization. Elaborate. The process which converts scyphostome into a strobila during the life cycle of schyphozoans, jellyfish. Transverse divisions of strobila pro
Spring overturn - Overturn In spring and early summer season the increased solar radiation melts the ice cover, which, as it attains a temperature of 4° Celsius, becomes dense
Q. What is the protein denaturation? Is there any change in the major structure when a protein is denatured? Secondary, tertiary and quaternary structures of proteins are spati
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd