
Biology
Human Physiology - Neural Control & Coordination Solutions
Which of the following best describes
how to achieve surface signaling
activity in activating or inactivating
gene regulation in mammalian cells?
A. Steroids carry out the following
activities to achieve signaling in
mammalian cells: bind the G-protein
coupled receptors; the G-proteins
activate cytoplasmic adenylyl cyclases
to split ATP into CAMP and
pyrophosphate; CAMP binds protein
Kinase-A and translocates into the
nucleus to phosphorylate CREB proteins,
causing their binding to dimeric CRB
protein that interact with DNA and
activate or inactivate gene regulation.
B. Small protein molecules carry out the
following activities to achieve signaling
in mammalian cells: bind the G-protein
coupled receptors; the G-proteins
activate cytoplasmic adenylyl cyclases
to split ATP into CAMP and
pyrophosphate; CAMP binds protein
Kinase-A and translocates into the
nucleus to phosphorylate CREB proteins,
cousing their binding to dimeric CRB
protein that interacts with DNA and
activates or inactivates gene regulation.
C. Enzymatic proteins carry out the
following activities to achieve signaling
in mammalian cells: bind the G-protein
coupled receptors; the G-proteins
activates cytoplasmic adenylyl cyclases
to split ATP into CAMP and
pyrophosphate; CAMP binds protein
Kinase-A and translocates into the
nucleus to phosphorylate CREB proteins,
causing their binding to dimeric CRB
protein that interacts with DNA and
activates or inactivates gene regulation.
D. Answers A, B and C are the correct
answer choices for this question.
E. Answers A and C are the correct
answer choices for this question.
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