Although there are specialized cells-both in structure and function-within the body, all cells have similarities in their structural organization and metabolic needs (such as maintaining energy levels via conversion of carbohydrate to ATP and using genes to create and maintain proteins).
Method 1 of 2: In a Paper Bag. 1. Gather a brown paper bag, the bananas you wish to ripen and an apple or tomato. By placing the bananas in a brown paper bag with another fruit, you will maximize the amount of ethylene gas released.Ethylene gas is the substance fruit produces as it ripens.ethod 1 of 2: In a Paper Bag. 1. Gather a brown paper bag, the bananas you wish to ripen and an apple or tomato. By placing the bananas in a brown paper bag with another fruit, you will maximize the amount of ethylene gas released.
1 As the small brown spots grow on the peel, the fruit inside ripens even further. 2  When the peel shows more brown or black than yellow, the fruit is over-ripe. 3  Avoid bananas that have a gray tint and look dull in color. 4  This is a sign that the bananas were refrigerated, which interferes with proper ripening. Put green bananas into a brown paper bag to speed up the ripening process. 2  Add an apple or a tomato to the bag to ripen the bananas in less than 1 day. 3  Another way to speed up the ripening process is to place the bananas near other ripe fruit in a bowl, such as other ripe bananas.