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Natali [406]
3 years ago
11

The side chain of ________ has a pka in the physiological ph range and is therefore often involved in proton transfer during enz

ymatic catalysis.
Biology
1 answer:
Sever21 [200]3 years ago
4 0
The answer to this question is histidine. Histidine i<span>s an </span>α-amino acid<span> involved in the biosynthesis of </span>proteins. The structure of histidine includes<span> an </span>α-amino acid<span>, a </span>carboxylic acid group<span>, and an </span>imidazole<span> side chain. Histidine was initially thought to be </span>essential<span> only for infants; however, it has since been found to be essential for adults too.</span>
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hope this helps

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3 years ago
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The thoracic cavity contains the ________. it is found ________ to the vertebral cavity. the thoracic cavity contains the ______
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The given question is incorrect. The correct question is:

Question: The thoracic cavity contains the ________. it is found ________ to the vertebral cavity.

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d) heart and lungs: anterior

Answer:

d) heart and lungs: anterior

Explanation:

The thoracic cavity is one of the major body cavities. The thoracic cavity is also called the chest cavity. It is formed by the ribs, the chest muscles, the sternum (breastbone), and the thoracic portion of the vertebral column. It is present in the anterior to the cavity formed by the spine to house the spinal cord. The pericardial cavity is the fluid-filled space of the thoracic cavity present around the heart. The thoracic cavity also has two pleural cavities to house the lungs.

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