Definition of color for English Language Learners. : 1  a quality such as red, blue, green, yellow, etc., that you see when you look at something. : 2  something used to give color to something : a pigment or dye. : 3  the use or combination of colors.
The thyroid hormones, triiodothyronine (T3) and its prohormone, thyroxine (T4), are tyrosine-based hormones produced by the thyroid gland that are primarily responsible for regulation of metabolism. Iodine is necessary for the production of T 3 and T 4.hyroid hormones (T 4 and T 3) are produced by the follicular cells of the thyroid gland and are regulated by TSH made by the thyrotropes of the anterior pituitary gland. The effects of T 4 in vivo are mediated via T 3 (T 4 is converted to T 3 in target tissues). T 3 is 3- to 5- fold more active than T 4.
For example, thymine would have a different nitrogenous base than adenine. In addition to this, it also contains one phosphate group and one deoxyribose sugar molecule to complete its signature recipe. Thymine is most often represented as a ring-like structure called a pyrimidine. Each respective base is in the shape of a ring-like form and there are two types. A purine is a base that contains a double ring form. By contrast, a pyrimidine is a base that contains a single ring form. Adenine and guanine are the purines. Thymine and cytosine are the pyrimidines. Adenine and thymine are almost always going to be partners on the DNA ladder. Cytosine and guanine will form the other base pair partnership.