These proteins allow substances to enter that wouldn't be able to otherwise. Only small hydrophobic substances can enter cells. However, these proteins aid crucial substsances in entering the cell.<span />
RAS is a very important protein that belongs to a class of protein referred to as GTPases and plays a crucial role in switching on pathways that control cell growth, proliferation, apoptosis and differentiation and migration. For RAS to become inactive it must hydrolyze GTP to GDP which slows down the process of cell proliferation. Mutation in one copies of RAS will result to cancer because the mutated copy will permanently attach to GTP and remain in activated form which will lead to uncontrollable cell division and hence development of cancer.
Answer:
A) vesicle
I think this is the right answer, i may be incorrect.
Answer:
C. amino acids.
Explanation:
Amino acids are organic molecules that combine to form proteins whereas a nucleotide is an organic compound that combines a sugar molecule and a phosphate . Phospolipids are fatty acids that also contain a phosphate molecule and lastly carbohydrates which are also known as saccharides are made up of Carbon , Hydrogen and Oxygen atoms .
Annelids have neither an external or an internal shell. Examples of annelids are
earthworms and leeches.
