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Sophie [7]
1 year ago
15

Which step constitutes the power stroke of muscle contraction?.

Biology
1 answer:
Murrr4er [49]1 year ago
3 0
The myosin head moves toward the M line, pulling the actin along with it , as the actin is pulled, the filaments move approximately 10 nm toward the M line
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Which of these describes the level of organization of the digestive system?
Valentin [98]

Answer:

the organ system

the levels of organization go from

•cells

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•population

•community

•ecosystem

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7 0
2 years ago
100 points and brainleist
solmaris [256]

Answer: DNA

Explanation:

A chromosome is a thread-like material with a long structure found in the cell nucleus. It mainly contains DNA and proteins. Due to the presence of DNA in chromosomes, it carries several genes.

The total number of chromosomes in human cell is 46: 44 are non-sex chromosomes while 2 are sex chromosomes

7 0
3 years ago
Read 2 more answers
Many cells make and use an enzyme, called catalase, to facilitate the decomposition of hydrogen peroxide (H2O2). The products of
Len [333]

Answer:

A. It decreases the activation energy needed to start the reaction

Explanation:

Organic catalyst which speed up the rate of organic chemical reaction is living cells are called enzymes.They have specific reaction site called active sites.This must be in prefect shape with the substrate for the organic chemical reaction to take place

When this occurs the minimum amount of  energy of  reaction to  activate or stimulate  the the atoms and molecules of the substrate to undergo chemical reaction is  lowered.This energy of reaction is celled activation energy.

Catalase thought its active sites lowers the activation energy so that the molecules of H2O2 could break down to C02 and H2 faster,thereby reducing the time for theses product to form.The is the general roles of enzyme.To increase the rate of chemical reaction,by reducing the activation  energy.

8 0
3 years ago
Three boats were moving across the surface of a smooth lake. The gray and pink boats have the same mass, and both of these boats
garik1379 [7]

Answer: There is no diagram but I had this on a test last week. The answer is the gray and pink boats experienced the strongest force because they are both more massive than the orange boat, and they all changed speed by the same amount.

6 0
2 years ago
What is the function of DNA polymerase answer ASAP please
pickupchik [31]

Great Question! <em>The function of DNA polymerase is to replicate, proofread and repair the DNA.</em>

5 0
2 years ago
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