Cyclins are a family of proteins that control the progression of cells through the cell cycle by activating cyclin-dependent kinase (Cdk) enzymes.
So A. Is correct
Both being ɑ-amino acids, alanine and serine each have an amino (–NH2) and a carboxyl (–C(=O)OH) functional group. The amino group of one amino acid and the carboxyl group of the other amino acid can react in a condensation reaction to form a covalent peptide bond. The resulting molecule would be a dipeptide.
The planets moons movements and the attraction that can be caused between it
Example : Pluto gains a fourth moon Or a massive new planet in our solar system
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The difference is that Carbohydrates are used for energy (glucose). Fats are used for energy after they are broken into fatty acids. Protein can also be used for energy, but the first job is to help with making hormones, muscle, and other proteins. Broken down into glucose, used to supply energy to cells.
Answer:
The mediastinum
Explanation:
The mediastinum is one of the three compartments of the thoracic cavity. It is found in between the right and left pleural cavities that contain the lungs. The mediastinum is like a midway in the thoracic cavity, and it is of great anatomical significance as it contains vital organs and structures such as the heart, aorta, esophagus, trachea etc. The mediastinum can be divided into two: inferior mediastinum and superior mediastinum.