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Dvinal [7]
3 years ago
7

What is antigen?What does it include?What is its function?

Biology
1 answer:
Varvara68 [4.7K]3 years ago
3 0

Antigens are proteins that are found on the surface of the pathogen and are viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles.  Antigens are usually carried by proteins and polysaccharides, and less frequently, lipids but it also needs to be attached to a large carrier molecule which is usually a protein.  When an antigen enters the body, the immune system produces antibodies against it. The Antigen stimulates the immune system to produce antibodies. YOUR WELCOME ;)

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What are exocrine glands
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8 0
3 years ago
What is the difference between code, codon, and anticodon?
NeX [460]
The codon is a set of 3 nucleotides that can be read to convey a message in your DNA. It can be a code saying to "start" the process of protein synthesis, or "stop" it, or to encode for an amino acid - the building blocks of proteins. 
<span>The DNA is read, and proteins are made by DNA Polymerase (simple version here, it is more complicated, but this is the gist of it) travelling down the DNA. As it travels, it reads the nucleotides and builds a chain of amino acids, that corresponds to the information gleaned from the DNA. </span>
<span>So, the codon is only on one side of the DNA, and there are 2 sides. In order to be able to keep the DNA safe, and package it well (and loads of other reasons ) there is a complimentary strand. The nucleotides that make up DNA are A, T, C, and G. A links to T and C to G, and vice versa. </span>
So if your DNA strand's codons read "AAG AGG TCA"
Then the complimentary strand will read "TTC TCC AGT" the three codons on the complimentary strand ARE THE ANTICODONS of the codons on the strand being read (aka "expressed").
<span>So a codon and an anti codon are made of the same things, it just is a matter of which is being actively expressed. Now, this gets insanely complicated when you learn more about reading frames! Not only are there those codons, but if you shift and start reading the "code" either one nucleotide earlier or later, it completely changes the message.</span>
7 0
3 years ago
What percent of species become extinct when mass extinction occurs?
777dan777 [17]

Answer:

Scientists estimate that at least 99.9 percent of all species of plants and animals that ever lived are now extinct.

Explanation:

(Happy to help)

6 0
3 years ago
Write a short essay on how will you protect natural resources.
USPshnik [31]

Answer:

By reducing, reusing and recycling of non-renewable resources. Non-human species must be disturbed only to meet the basic needs. Planting of more and more trees to save our forest resources. Seeking alternatives to non-renewable resources.

Explanation:<u><em>hope this helps..pls mark me brainliest</em></u>

7 0
2 years ago
Question 1 (1 point)
Dennis_Churaev [7]
C is the answer just did it
5 0
2 years ago
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