<span>The circulatory system is vital in the exchange of oxygen with the cells in the animal's body because there is no living creature that can survive without oxygen, it keeps the body active.
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Answer:
The correct answer will be option-A site.
Explanation:
The addition of the specific amino acids to the nascent peptide occurs after the binding of the amino acid to the tRNA via acylation of the amino acid through a process called t-RNA charging.
This charged tRNA binds to the A-site or Aminoacyl site of the ribosomes where the initiation stage of the translation begins. This amino acid is shifted to the P site or peptidyl site and exit from the E site of the ribosome.
Thus, option-A site is the correct answer.
<span>How are the dark reactions that occur in plants dependent on the light reactions?
a.The chemical energy used in the dark reactions is produced in the light reactions.
Photosynthesis is divided into two parts.
1) Light - dependent reaction
2) Light - independent reaction
Light dependent reaction absorb energy from the sun to produce ATP and NADPH, these energies are used in the light-independent reaction. The ATP provides the energy, while the NADPH provides the electrons required to fix the carbon dioxide into carbohydrates.
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Antigen presenting cell is a cell phagocytizes an antigen and displays fragments of it on its surface for recognition by other cells of the immune system
<h3>What is Antigen presenting cells?</h3>
An antigen-presenting cell refer to an immune cell that detects, engulfs, and pass a message to the adaptive immune response about an infection. When a pathogen is detected, the antigen presenting cells will engulf the pathogen and digest it to form many different fragments of the antigen.
Therefore, Antigen presenting cell is a cell phagocytizes an antigen and displays fragments of it on its surface for recognition by other cells of the immune system
Learn more about antigen presenting cell here.
brainly.com/question/13022436
