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nikklg [1K]
3 years ago
10

DESCRIBE what activation energy is.

Biology
2 answers:
Trava [24]3 years ago
8 0
Minimum energy required to start a chemical reaction
Semmy [17]3 years ago
5 0
Activation energy is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.

for example , striking a match on the side of a matchbox provides the activation energy, in the form of heat produced by friction.
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A product is the starting materials of a chemical reaction, true or false?
zheka24 [161]

Answer:

False

Explanation:

Reactants are the starting materials of a chemical reaction.

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3 0
3 years ago
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: Cytotoxic T cells are rapid killers of infected target cells. Within minutes of the interaction of a cytotoxic T cell with a t
LiRa [457]

Cytotoxic T cells are rapid killers of infected target cells. Within minutes of the interaction of a cytotoxic T cell with a target cell, the program of apoptosis in the target cell is initiated. This rapid activity is a consequence of The extremely rapid production of granzymes and perforin by cytotoxic effector cells upon encountering a target cell.

  • A type of T cell known as a cytotoxic T cell (CD8+ T cell) is in charge of removing things that the immune system recognizes as dangerous.
  • Cytotoxic T cells are essential for controlling bacterial growth and illnesses in the body.
  • By instructing their targets to undergo apoptosis, cytotoxic T lymphocytes kill their prey.
  • Cytotoxic T cells can instruct antigen-specific target cells to die within 5 minutes of coming into contact with them when they are mixed with target cells and quickly brought into contact by centrifugation.
  • The speed with which cytotoxic T cells can induce apoptosis in their targets is due to the release of prepared effector molecules that trigger the target cell's own endogenous apoptotic pathway.

learn more about Cytotoxic T cells here: brainly.com/question/9292555

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8 0
2 years ago
What are some facts of the great white shark. Write at least more than 5 sentneces.
Amiraneli [1.4K]


The great white shark is about 4.5 meters in length, but some can be as large as 6 meters. They weigh about 2250 kilograms. The top part of their bodies are usually blue-gray in colour. Great white sharks can reach a speed of up to 25 kilometers per hour. They search for food near the surface of the ocean. They stay below deep in the water where they are well hidden.

Hope it helps!

Can you please choose mine as the brainliest answer.

5 0
3 years ago
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If an eclipse were to last for days what effects might have on plants and wildlife
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There won't be any Photosynthesis occurring and plants and tress will eventually die.. When the plants die the omnivorous animals will die of hunger..... Also we will be suffering from famine

6 0
3 years ago
Proteins in the cell membrane have many functions. Which type of protein would be used primarily to transport materials in or ou
S_A_V [24]

So we know that to transport materials in or out of the cell, we need to have access to both the inside and outside of the cell. This would require that the protein be a transmembrane protein that reaches both the inside and the outside of the cell.

So in this case, let's look at pore proteins. These are proteins that cross a membrane and act as a pore for the materials that need to cross the membrane.

One example of a pore protein is an aquaporin. These proteins aid in the transport of water into or out of a cell.

Therefore, the answer to your question is: A) Pore proteins.

8 0
3 years ago
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