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Kryger [21]
3 years ago
14

PLEASE HELP!!!

Biology
1 answer:
jeyben [28]3 years ago
6 0
Active transport because the oxygen is moving from low concentration to high concentration
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Explanation:

a sugar, a phosphate group, and a nitrogenous base.

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What reasoning correctly pairs a body system with its relationship to the digestive system?
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excretory system: removes waste from blood.

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( Am not completly sure, but i think this is the answer)

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An enzyme contains a catalytic histidine residue in its active site that must release an R group proton to solution in order to
hjlf

Options missing:

a) The pH of the environment should be relatively high.

b) The pH of the environment should be relatively low.

c) The pH of the environment would not matter.

d) The environment should be set to the biochemical standard state.

Answer:

a) The pH of the environment should be relatively high.

Explanation:

For optimal function an enzyme needs a certain environment or condition. As temperature increases, the rate of enzyme activity also increases. As temperature increases toward its optimum point of 37 degrees Celsius (98.6 F), hydrogen bonds relax and make it easier for the hydrogen peroxide molecules to bind to the catalase.

The part of the enzyme where this reaction takes place is called the active site. A temperature that is higher or lower than this optimum point changes the shape of the active site and stops the enzyme from working. This process is called denaturation.

Enzyme pH levels also change the shape of the active site and affect the rate of enzyme activity. Each enzyme has its own optimal range of pH in which it works most effectively. In humans, catalase works only between pH 7 and pH 11. If the pH level is lower than 7 or higher than 11, the enzyme becomes denaturated and loses its structure. The liver sustains a neutral pH of about 7, which creates the best environment for catalase and other enzymes.

General acid catalysis would require histidine to be protonated at pH values (pH 8.0) optimal for enzymatic activity which is relatively high.

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Other than food and oxygen what do marine plants provide for other marine organisms
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They provide an important habitat!

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Very rapid (i.e. in 1-2 seconds) responses to maintain normal blood pressure during a sudden decrease in blood volume by hemorrh
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Answer:

vasoconstriction of capillaries.

baroreceptors in the aortic arch.

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Vasoconstriction of capillaries and baroreceptors in the aortic arch are the two quick responses of body to maintain normal blood pressure during hemorrhage. Vasoconstriction is very necessary for lowering acute blood loss during hemorrhage means escape of blood from a ruptured blood vessel as well as maintain body heat and arterial pressure. The function of baroreceptors is to respond to the change in the tension of the arterial wall when blood pressure changes.

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3 years ago
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