This is true.
An easy way to remember this is that Cis-acting elements are physically linked to a set of structural genes. So promoters and operators are physically linked to the gene they express. They are cis acting because they are on the same strand as the structural gene they control.
On the other side, trans means that they can come from somewhere else and act. A good example of this would be regulatory proteins. These could be expressed somewhere else (or on a different strand) and then bind and affect transcription.
Answer:
A. Electron Transport chain and Fermentation,
Explanation:
C. The Krebs cycle produces electron carries for the ETC (electron transport chain)
Based on the image, the structure that carries impulses to the cell body is I. This part of the cell is called an axon terminal. They are each separated from a neuron by a gap called a synapse. While the structure that carries impulses away from the cell body are III. This structure is called the axon.
Answer:
The source of the oxygen in amino acids was water (H2O).
Explanation:
The Miller-Urey experiment was a chemical experiment in which the hypothetical conditions present on the early Earth were simulated. This experiment was conducted in order to test what kind of environment would be needed to allow life to begin. The experiment is considered to be the classic experiment on the origin of life. It was conducted in 1953 by two scientists; Stanley L. Miller and Harold C. Urey.
In this experiment Miller and Urey placed water (H2O), methane (CH4), ammonia (NH3) and hydrogen (H2) into an enclosed chamber. The chamber was set up to mimic the atmosphere of the early Earth, with a reducing environment and high amounts of energy (lightning storms and high temperatures). At the end of the experiment Miller and Urey observed the spontaneous synthesis of amino acids, life-essential compounds, and concluded that organic molecules needed for life could be formed from inorganic components.
Starting materials used in this experiment served as a source of different elements needed for synthesis of amino acids. The source of the element oxygen in amino acids was water (H2O) that was put inside the chamber.
