<span>In the closed awareness context, patients do not know if they are going to die because the doctor and staff deliberately keep the information from them."</span>
Meiosis has two rounds of genetic separation and cellular division while mitosis only has one of each.
Answer:
The macromolecules that forms pumps and channels in the cell membrane, allowing the entry and exit of molecules to the cell are protein.
Explanation:
Membrane integral proteins are a type of macromolecule attached to the structure of the membrane and have ends in contact with the cytoplasm and the extracellular medium.
These <u>protein molecules can act as channels and transporters or pumps</u>, to facilitate the passage of substances through the membrane. An example of transmembrane channels are ion channels, while a protein transporter is the sodium potassium ATP-ase pump.
Membrane proteins can also act as surface receptors and enzymes linked to the cell membrane.
The other options are not correct because
:
- <em><u>Carbohydrates</u></em><em> can be found on the membrane bound to other molecules, such as glycoproteins and glycolipids, but they do not act as pumps or channels.
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- <em><u>Lipids</u></em><em> have the function of being the main component of the cell membranes.
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- <em><u>Nucleic acids</u></em><em> are found in the nucleus, and are not part of the cell membrane.</em>
The group that makes their own food is called plants.
Plants use a system called photosynthesis, they use energy from the sun to convert water from soil and carbon dioxide from the air to produce glucose, which is what plants use for energy.
Hope this helped! :D
