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Explain Free-radical theory of Ageing
The body is subjected to a dilemma. On one hand, O2 is essential for life and on the other hand, oxidative reactions can set free a lot of impaired electrons which are highly reactive. These can possibly damage vital macromolecules like DNA, proteins etc. by the process of peroxidation.
How does our body know 'what to do' Feeling, knowing, doing anything depends on special structures called nerves. Neuronal cells in the body act as various messengers according
What is the minimum depth required for a feature to be considered a canyon? In fact, it is a bit like allowing for when a few grains of sand become a heap of sand: there is no
Softening hard water by boiling Temporary hardness can be removed from water by boiling. Shake a little temporary hard water with a few drops of soap solution and see if you c
is it true or false that, as the universe expands, it is expanding within an already existing universe
INTRODUCTION : By doing this exercise, you will learn how to deal with emergency situations arising out of laboratory accidents. You are aware that a tense situation arises once a
1.) Imagine that you are a particle inside an ice cube. You were placed into a glass of lemonade to cool it down. The lemonade has now been drunk and you have been left in the glas
Cement and concrete Secure a small bag of Portland cement. Have the pupils mix it with water and put it in tin can covers, paper cups, or small pasteboard boxes unless it harde
how do plates make there own food
COPD
Determine how nitrogen is useful in plant nutrients The supply of nitrogen is related to carbohydrate utilisation. If nitrogen supply is insufficient, carbohydrates will be dep
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