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Molodets [167]
3 years ago
15

Which sentence best explains how enzymes speed up a chemical reaction?

Biology
2 answers:
yulyashka [42]3 years ago
8 0

Answer:

Enzymes are catalysts, meaning stuffs in charge of increasing the rate of chemical or biochemical reactions, they do it so by lowering the energy needed to start chemical reactions, this energy is called <em>"activation energy"</em>; Thereby the best suitable answer is the last one (<em>4th</em>).

Explanation:

givi [52]3 years ago
6 0
Enzymes lower the activation energy of a chemical reaction.
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Consider a cell in which Cl- distributes passively across the membrane according to the membrane potential. The resting membrane
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Answer:

1000 mM

Explanation:

Using V = -60 mV㏒₁₀[K/K'] where V = membrane potential = -60 mV, K = intracellular concentration = unknown and K' = extracellular concentration = 100 mM

So, V = -60 mV㏒₁₀[K/K']

-60  mV = -60 mV㏒₁₀[K/K']

dividing both sides by -60mV, we have

-60  mV/-60 mV = ㏒₁₀[K/K']

㏒₁₀[K/K'] = 1

taking antilogarithm of both sides, we have

[K/K']  = 10¹

multiplying both sides by K', we have

K = 10K'

K = 10 × 100 mM

K = 1000 mM

So, the intracellular Cl- concentration is 1000 mM

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Tell in your own words:<br><br> Why is it called a Solar System?
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These cells produce pepsin, which breaks down proteins
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The cells that produce pepsin, an enzyme that breaks down proteins during the digestive process is Chief cells.  Pepsin is the main digestive enzyme in the stomach that breaks down proteins. Pepsin is produced by the chief cells in the inactive form pepsinogen, which is then converted to pepsin by the hydrochloric acid from the parietal cells. 
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melisa1 [442]

Answer:  The genetic material of the cell is duplicated during S phase of interphase just as it was with mitosis resulting in 46 chromosomes and 92 chromatids during Prophase I and Metaphase I. However, these chromosomes are not arranged in the same way as they were during mitosis.

Explanation:

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