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S_A_V [24]
3 years ago
15

Asking questions about the genetic code

Biology
1 answer:
Pepsi [2]3 years ago
5 0

Answer:

Explanation:

Genetic code is a sequence of Nitrogenous base in RNA(ribonucleic acid) or DNA (deoxyribonucleic acid) that determines or specify an amino acid. Genetic codes consist of a triplets code called codon that are written in three alphabeth each codon specifies an amino acid.

Example is AUG that specifies methionine which is a start codon. There are 64 codon, 61 of them specifies an amino acid while 3 are called the stop codon as they terminate amino acid formation process.

An alteration in the sequence of this nucleotide can lead to the formation of a new amino acids other than the specify.

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Ksivusya [100]

The four important characteristics of respiratory surface are:

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4. Blood supply

Respiratory system or respiratory tract is divided into upper and lower tract. Upper respiratory tract includes nose and its cavities, sinuses, pharynx and the part of the larynx. Lower respiratory tract consists of the trachea, bronchi, bronchioles and the alveoli.

Alveoli are the ends of the respiratory tract the smallest units in it. Alveoli are small folded air sacs that are branching off from alveolar ducts and providing an extremely large surface area for the gas exchange. Gas exchange occurs thanks to small blood vessels – capillaries that surround alveoli and it occurs via the process of diffusion.

So, respiratory surface is thin membrane also known as the blood–air barrier that consists of the alveolar epithelial cells, their basement membranes and the endothelial cells of the alveolar capillaries.

6 0
3 years ago
The atoms that composes non-living substances are the same as the atoms that compose living substances
Vedmedyk [2.9K]

Answer:

Partly true

Explanation:

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answer:

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answer number 2

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3 years ago
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