Answer:
The correct option is A. Steroid hormones exert their action by entering the nucleus of a cell and initiating or altering the expression of a gene.
Explanation:
Steroid hormones are derived from cholesterol and regulate multiple biological processes. All steroid hormones exert their action by crossing the plasma membrane and by binding with their respective intracellular receptors. They stimulate cell growth in a very different way, their lipophilic nature gives them the ability to cross lipid barriers, so, without the need for extracellular signals, these hormones can easily enter the cell, cross the cytoplasm and reach the nucleus. There they bind to specific receptors that are associated with DNA promoter regions, modifying their structure and promoting the expression of the genes under their control.
Olá! Eu acredito que você colocou sua pergunta na categoria errada. Não se esqueça de fazer a pergunta na seção de idiomas estrangeiros para evitar que a pergunta seja excluída.
Com sua pergunta real, não acho que posso ajudá-lo com isso, e sinto muito por isso.
Answer:
b. False
Explanation:
Channel proteins use passive transport, that is, they do not require energy such as ATP for transporting molecules.
They have 46, instead of the usual 47.
2 Tt and 2 tt or 50% for both heterozygous and homozygous recessive your welcome.
