Answer: Substances that are protein based cannot cross the lipid cell membrane, but can exert their effect by binding to the proteins based receptors present on the lipid bilayer.
Explanation:
Hormones such as calcitonin , Parathyroid hormone and pituatry horomones are proteins and water soluble.They cannot cross lipid bilayer but can bind to ligand binding protein receptors.
These receptors are protein macromolecules that are specific in nature for specific hormones.
After binding to the receptors, these hormone-recpetor complexes activate second messengers and regulate the downstream effects.
<span>Daniel Gabriel Fahrenheit</span>
Answer:
A
Explanation:
a bacteria takes a longer time to spread throughout the body
The hind legs of the frog are adapted for leaping and swimming. They have strong extensor muscles. When these muscles contract, the limbs extend thrusting the foot against the water or land. The frog's forelimbs are shorter and used to steer the frog while swimming and to absorb shock while landing.
All organic compounds contain covently bonded carbon. They are made up of the monomer Amino Acids. When amino acids join to form a protein. Which is then translated. This is an organelle in the nucleus that creates ribosomes!
