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alex41 [277]
3 years ago
11

Phosphofructokinase is a four-subunit protein with four active sites. phosphofructokinase catalyzes step 3 of glycolysis, conver

ting fructose-6-phosphate to fructose-1,6-bisphosphate. phosphoenolpyruvate (pep) is the product of step 9 of glycolysis. the pep concentration in the cell affects phosphofructokinase activity. select the true statements about pep regulation of phosphofructokinase.
Biology
1 answer:
zaharov [31]3 years ago
8 0
<span>PEP is included in the regulation of phosphofructokinase (PFK). PFK is allosterically inhibited by PEP which means that PEP binds to PFK which results in a conformational change of PFK. As a result of this PFK is inhibited. High levels of PEP indicate a sufficient cellular energy supply and therefore there is no need for further glycolysis.</span>
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A researcher proposes a model of an enzyme-catalyzed reaction in which a reactant is converted to a product. The model is based
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Answer: The answer is B: The enzyme's active site binds to and stabilizes the transition state, which decreases the activation energy of the reaction.

Explanation: An enzyme is a biological molecule which speeds up the rate of chemical reactions in the body (reactions within cells). They are proteins.

    The transition state is the transition from substrate to product. The molecule is no longer a substrate but also not yet a product.

The enzyme is able to speed up the reaction by stabilizing the transition state. The transition state's energy is also the activation energy in terms of reaction. The activation energy is the minimum energy that is required to break some bonds of the reactants in order to turn them to products.

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4 0
3 years ago
One tank of goldfish is fed the normal amount of food once a day. A second tank is fed twice a day. A third tank is fed four tim
Daniel [21]

the constants are the type of food given to the fish.

4 0
3 years ago
Which two organisms in the food web are primary consumers? fox and rabbit rabbit and grasshopper shrew and snake snake and fox
Lorico [155]

The correct answer is B. Rabbit and grasshopper

Explanation:

In ecosystems, primary consumers refer to organisms that eat producers, which are in the first level and include plants as they produce their own energy. Due to this, primary producers include mainly herbivore animals such as cows, goats, sheep, etc. Moreover, primary consumers are the prey of other animals, which are known as secondary consumers. In the image presented, the primary consumers include the grasshopper and the rabbit because the arrows indicate they feed exclusively on grass, which is the producer of this food web.

6 0
3 years ago
Did you model weathering, erosion, or both in this lab? Give an example of a step of the lab in which you modeled a process to s
kolezko [41]

Modeling of weathering and erosion can be performed in lab.

<h3>Procedure of Modeling Weathering and Erosion using graham cracker:</h3>

1. Fill the ice cube tray or other tiny containers with 100 drops of water in each of the two or three cells using the eyedropper. Make the water entirely solid by freezing it for however long(for 3-4 hrs.).

2. Insert one graham cracker section into the bowl. To create a ramp-like structure out of the Graham Cracker, place one end on the bowl's lip and the other end at the bottom. To secure the cracker to the side of the bowl, dab some icing on the back of the cracker.

3.Add water to the eyedropper. Hold the dropper at a height of about 1 inch above the cracker's top. the dropper over the cracker in the middle. Apply 100 drips, always aiming for the same area.

4.Keep an eye on what the cracker does. Keep a record of your findings.

5. Pour the water into a glass that is clear after removing the Graham cracker. Make notes about the water, grading its cloudiness among your observations.

6.In the same manner as in step 2, clean and dry the bowl and add a Graham cracker to it. Grab an ice cube and wipe it over the graham cracker until it melts completely.

7.Remove the graham cracker and pour the melted water into the clear glass.

<h3>Result:</h3>

Appearance of water collected after is moved across graham cracker.

Learn more about weathering and erosion here:

brainly.com/question/829782

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5 0
2 years ago
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Answer:

c

Explanation:

because ninja from fortnite told me

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Read 2 more answers
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