Answer: more energy must be available in the producer level than in the consumer levels
Explanation:
Prediabetes is a condition in which blood glucose levels are above normal, but not high enough to be diagnosed as diabetes.
A small group of friends that will ignore others, focusing only on themselves, is known as a clique.
Answer:
Lumen
Explanation:
Luminous flux is known as the power of light perceived by the eye. The SI unit of luminous flux is known as lumen where one lumen is the amount of luminous flux emitted from a directional unit point source through a unit solid angle.
Since the human eye can see only the visible spectrum of light which is perceived in the form of luminous flux and thus lumen.
Thus, the lumen is the correct answer.
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>
