When cells make protein from amino-acids, they require energy from ATP. It is also necessary to use ATP to link glucose molecules together to form starch or glycogen. Mitochondria: 1  have a double membrane the inner membrane. 2  the outer membrane; 3  have their own DNA this carries the information to make the enzymes;
In this technique, each member of the population has an equal chance of being selected as subject. The entire process of sampling is done in a single step with each subject selected independently of the other members of the population. There are many methods to proceed with simple random sampling. The most primitive and mechanical would be the lottery method. Each member of the population is assigned a unique number.
This is the main method of sampling in developing countries where adequate population lists are rare. The area to be covered is divided into a number of smaller sub-areas from which a sample is selected at random within these areas; either a complete enumeration is taken or a further sub-sample. Figure 7.3 Aerial sampling. A grid, such as that shown above, is drawn and superimposed on a map of the area of concern.