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Similar to all animal cells, protozoans are covered by a plasma membrane which surrounds cytoplasm of the cell, protozoan's integument or skin. Like all membranes, it's permeable; water and low molecular weight substances dissolve in it. Oxygen, is required for metabolism, and metabolic wastes which are generated by metabolism, diffuse across the surface, giving plasma membrane respiratory and excretory functions. Nucleus, with its nucleolus and chromosomes, contains genetic material and would be involved in providing copies of itself for new cells, reproductive system. Golgi apparatus, rough endoplasmic reticulum, and lysosomes which they produce, fuse with ingested food vacuoles, phagosomes.
Compare and contrast the effect of a deletion in the operator of the lactose operon with one in the operator of the histidine operon.
VITAMIN - D Also known as Calciferol / Anti ricket vitamin / sun shine vitamin. It is necessary for bones & teeth. It is synthesized in presence of UV rays of sunl
describe an experiment to test if RNA is a transcript of DNA
Characters of pennetula
Ecosystems are so varied in form and structure that whatever has a distinct community of its own, can be called an ecosystem eg. A crop field, grass land, barks etc. all the ecosys
Myasthenia Gravis Myasthenia gravis (severe muscle weakness) is characterised by muscular fatigue in the wake of very little exercise. It may be apparent after a short period o
What is the difference among Gram positive & Gram negative bacteria based on cell content? Ans) The cell membrane is made if more of lipoproteins in gram negative compared to gr
Minerals :- Aluminium Food Source Low and variable in foods, component of some antacids and leavening agents Nutritional Functional role Possib
Q. What do you understand by Chromosome Behaviour? When we study meiosis. we not only observe the regularity of pairing which is important' for' the fertility of the plants, we
EGESTION To give out undigested food from alimentary canal. Faeces can remain in colon for 36 hrs. then moving into rectum by gastro-colic reflex. Faeces consists of 3
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