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.
Making the world better, one answer at a time. Thymine and cytosine are examples of nucleobases found in DNA. Thymine is paired with adenine, while cytosine is paired with guanine. Thymine and cytosine are examples of nucleobases found in DNA. Thymine is paired with adenine, while cytosine is paired with guanine.