Explanation:
Most bacteria possess a single circular double-stranded DNA molecule located in the nucleoid region. Some bacteria may also have linear chromosomes or multiple chromosomes, but the typical prokaryotic chromosome is circular. Eukaryotes have linear chromosomes. Plasmids are small, circular extra-chromosomal DNA in bacteria.
Explanation:
Messenger RNA (mRNA) is transcribed from DNA and carries the codon sequence to ribosomes, where it is translated into a polypeptide. tRNA brings amino acids, rRNA forms ribosomal structure, snRNA involved in splicing.
Explanation:
Adrenocorticotropic Hormone (ACTH) is a peptide hormone secreted by the corticotroph cells of the anterior pituitary gland. Its primary target is the adrenal cortex (the outer layer of the adrenal glands). ACTH stimulates the growth of the adrenal cortex and the synthesis and secretion of its steroid hormones, primarily the glucocorticoids (like cortisol), and to a lesser extent, androgens and mineralocorticoids. ACTH secretion is controlled by Corticotropin-Releasing Hormone (CRH) from the hypothalamus and by the negative feedback of cortisol.
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