Answer:
Explanation:
i) Allosteric control
-Allosteric modulation is a mechanism whereby the activity of an enzyme is either stimulated or inhibited by a compound that binds to a site, called the allosteric site, that is dimensionaly different from the enzyme’s active site
ii) Covalent modification
-Covalent modification of enzymes, as illustrated by the addition (or removal) of phosphates, is a general mechanism for changing the activity of enzymes.
-Enzymes that transfer phosphate groups to other proteins are called protein kinases and regulate such diverse activities as hormone action, cell division, and gene expression.
Question: The model shows two types of proteins, channels and carriers, allowing the movement of molecules into the cell. As indicated by the model, what question is best asked about the role of the proteins in this type of transport? A) How can proteins be used in active transport? B) How do proteins allow for endocytosis of large molecules? C) How can molecules move against the gradient through proteins? D) How do proteins allow for facilitated diffusion of molecules into the cell?
The question will be "D) How do proteins allow for facilitated diffusion of molecules into the cell?"
Explanation:
Since proteins are being used but energy is not, this process is called facilitated diffusion. Protein channels and carriers are both types of facilitated diffusion. Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.
<span>Modern sea star larvae resemble some primitive vertebrate larvae and this similarity suggest that the primitive vertebrates share a common ancestry with sea stars
it means their ancestors shared some common features so that is why it resemble primitive vertebrate larvare
hope it helps</span>
<h3>
Answer:</h3>
Which of the following is the most accurate example of supply and demand?
- The consumer cost for roses drops when fewer roses are available for sale.
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Explanation:</h3>
What is demand?
- Demand refers to consumers' desire to purchase goods and services at given prices. Demand can mean either market demand for a specific good or aggregate demand for the total of all goods in an economy.