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MitochondriaMitochondria are rod-shaped organelles that can be considered the power generators of the cell, converting oxygen and nutrients into adenosine triphosphate (ATP). ATP is the chemical energy "currency" of the cell that powers the cell's metabolic activities. This process is called aerobic respiration and is the reason animals breathe oxygen. Without mitochondria (singular, mitochondrion), higher animals would likely not exist because their cells would only be able to obtain energy from anaerobic respiration (in the absence of oxygen), a process much less efficient than aerobic respiration. In fact, mitochondria enable cells to produce 15 times more ATP than they could otherwise, and complex animals, like humans, need large amounts of energy in order to survive.</span>
The word hurricane originated from the name of the Mayan god hurcan
Natural resources are the resources that occur naturally like water, sunlight, wind etc. Organisms including humans use natural resources in many ways. Humans use water for drinking, agriculture, washing clothes etc. Many aquatic organisms use water as their habitat, for example fish. Plants use sunlight for synthesis of food. We use wind for inhaling oxygen. Apart from that, we also use sunlight and wind to generate electricity.
A protein molecule is made from a long chain of these amino acids, each linked to its neighbor through a covalent peptide bond (Figure 3-1). Proteins are therefore also known as polypeptides. Each type of protein has a unique sequence of amino acids, exactly the same from one molecule to the next.
