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lakkis [162]
3 years ago
13

Enzymes are biological catalysts. Explain what they do in living systems

Biology
1 answer:
Marizza181 [45]3 years ago
7 0

An enzyme lowers the activation energy of a reaction so it can take place within living organism, so an enzyme is a biological catalyst.

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Explain how the animals and plants of a healthy ecosystem are organized and interact.
posledela
Because they all need one another to survive. flowers need bees to distribute their pollen. and some animals relly on plants for food. and plants relly on the sun to be healthy


-don’t forget to heart and mark as brainliest! thanks!
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What are the functions of veins ?
coldgirl [10]

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They are veins and arteries. The primary function of arteries is to transport highly oxygenated, nutrient-rich blood from our hearts and distribute it to the rest of our body. Veins, on the other hand, are used to pump much-needed blood back to the heart.

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Plant cells have a special organelle that helps them to make their own food. What is that
andriy [413]

Answer:

photosynthesis

Explanation:

it helps make food

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2 years ago
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The _________________ is composed of and endothelial layer that is continuous with the endocardium of the heart.
hram777 [196]

The t<u>unica media</u> is composed of an endothelial layer that is continuous with the endocardium of the heart.

<h3>What is tunica media?</h3>

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Elastic fibers make up the majority of the tunica media in bigger vessels. The number of elastic fibers reduces as arteries get smaller, whereas the number of smooth muscle fibers grows. The strongest of the three layers is the tunica adventitia, which is the top layer. Elastic and collagenous fibers make up its structure.

Learn more about tunica media here:

brainly.com/question/15395381

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4 0
1 year ago
Imagine that scientists have discovered an industrial pollutant that modifies the structure of a cell cycle checkpoint protein s
Nadya [2.5K]

Answer:

Carcinogenic

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A carcinogenic substance is able to modify or damage the genome in a way which promotes the formation of cancerous cells. Cell cycle checkpoint proteins are very crucial for the progression of normal cell cycle. They check for any anomaly in their designated step and halt the process if it is detected. Repair mechanism is activated and cell cycle does not progress till the damage has been repaired.

Here, the pollutant alters the structure of these proteins such that they lose their function. They are not be able to stop cell cycle from progressing even if there is some damage in the genome. The cell divides and gives rise to more damaged cells. Eventually these cells lose their normal function and just keep dividing due to which their division rate becomes double of the normal rate. It can ultimately give rise to cancer which is why the chemical is carcinogenic.  

7 0
3 years ago
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