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charle [14.2K]
3 years ago
5

What three element do all macromolecuels have

Biology
2 answers:
rosijanka [135]3 years ago
7 0

Answer:

Macromolecules are large molecules composed of thousands of covalently connected atoms. Carbohydrates, lipids, proteins, and nucleic acids are all macromolecules. Macromolecules are formed by many monomers linking together, forming a polymer. Carbohydrates are composed of carbon, oxygen, and hydrogen.

Explanation:

sweet-ann [11.9K]3 years ago
3 0

Answer:

Each small organic molecule can be a unit of a large organic

molecule called a macromolecule. There are four classes of

macromolecules (polysaccharides or carbohydrates, triglycerides or

lipids, polypeptides or proteins, and nucleic acids such as DNA & RNA).

Carbohydrates and lipids are made of only carbon, hydrogen, and

oxygen (CHO). Proteins are made of carbon, hydrogen, oxygen, and

nitrogen (CHON). Nucleic acids such as DNA and RNA contain carbon,

hydrogen, oxygen, nitrogen, and phosphorus (CHON P).

Explanation:

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State two examples of situations where active transport occurs
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When something needs to be transported against its concentration gradient, or a molecule is too big to simply diffuse through a membrane, active transport has to be used. So active transport requires energy (ATP).

Examples:

1. Antiport pumps: transport one substance in one direction while transporting another substance the other way. An example of this is the sodium-potassium pump.

2. Symport pumps - uses a substance that wants to move from an area of high concentration to low concentration and carries another substance against its concentration gradient. An example of this is the sodium-glucose transport protein

3. Endocytosis - large amounts of extra cellular fluid can be taken into a cell - needs ATP to bind proteins in the cell membrane and causes them to change their shape...which eventually causes the surrounding of the fluid to be brought in (a vesicle).

4.exocytosis - opposite of above

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Why is the permeability of
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Explanation:

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