I f you need to know the exact times that the markets open and close, you have to take time zones into consideration. It is very simple when expressed in GMT. This is Greenwich Mean Time. This is the standard (winter) time in Greenwich, London which is the point of zero longitude on the globe. The normal Forex market hours are 22.00 Sunday GMT to 22.00 Friday GMT.
Genes are made of a chemical called DNA, which is short for 'deoxyribonucleic acid'. The DNA molecule is a double helix: that is, two long, thin strands twisted around each other like a spiral staircase.The DNA double helix showing base pairs. The sides are sugar and phosphate molecules. The rungs are pairs of chemicals called 'nitrogenous bases', or 'bases' for short.There are four types of base: adenine (A), thymine (T), guanine (G) and cytosine (C). These bases link in a very specific way: A always pairs with T, and C always pairs with G. The DNA molecule has two important properties.he rungs are pairs of chemicals called 'nitrogenous bases', or 'bases' for short. There are four types of base: adenine (A), thymine (T), guanine (G) and cytosine (C). These bases link in a very specific way: A always pairs with T, and C always pairs with G. The DNA molecule has two important properties.
Build a DNA molecule Get the Gizmo ready: If necessary, click Reset to start the building process. Question: What is the structure of DNA? 1. Build: Follow the steps given in the Gizmo to construct a molecule of DNA. (Note: For simplicity, this DNA molecule is shown in two dimensions, without the twist.) Stop when the hint reads: âThe DNA molecule is complete.â In the spaces at right, list the sequence of nitrogenous bases on the left-hand side of the DNA molecule and the right-hand side. 2. Take a picture: Click the camera ( ) at upper right to take a snapshot of your DNA molecule.