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musickatia [10]
3 years ago
8

A single antigen molecule may be composed of many individual ________.

Biology
1 answer:
ss7ja [257]3 years ago
4 0

Answer:

Epitopes.

Explanation:

Antigen: Antigens are foreign proteins that enter the host body through an infection. Antigens are generally high molecular weight proteins or polysaccharides. Viruses and bacteria contain antigen on their surface or inside the body.

Epitope: Epitope is the molecular region on the surface of the antigen which interacts with the antibody binding site on the antigen. Epitopes are capable of stimulating an immune response so, these are also known as antigenic determinants. Binding between the receptor and epitopes occurs when they both fit together like a puzzle, that event is necessary to activate B-cell production of antibodies.

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Describe the steps of Transcription, and describe the steps of Translation
goldfiish [28.3K]

Answer:

The various steps in the transcription and translation process of protein synthesis are described below.

Explanation:

Proteins (made up of amino acids) have an important role in the various functioning process of an organism. Protein synthesis which takes place in the cells of an organism consists of two major processes: transcription (DNA to RNA) and translation (RNA to protein).

Transcription: It is the first process in protein synthesis which occurs in the cell nucleus where a single-stranded messenger RNA (mRNA) is created using a DNA strand and the genetic instructions in DNA are transferred to this mRNA. The steps in transcription are initiation, elongation, and termination. The beginning process known as initiation occurs when an enzyme RNA polymerase binds to a promoter (region of a gene) and the DNA unwinds. One of the DNA strands acts as a template and the enzyme reads the bases in the template DNA strand.

The next step is elongation, where the RNA polymerase builds a strand of mRNA by the addition of nucleotides using complementary base pairs. Here, adenine (A) in the DNA binds to uracil (U) in the RNA. Termination is the last step in which the transcription process ends when the RNA polymerase comes across a termination sequence in the gene. Thus, the completed single-stranded mRNA detaches from DNA.  

Translation: It is the second process in protein synthesis which occurs in the ribosome of the cell where the genetic information in mRNA is used to create a protein from amino acids. A triplet of nucleotides is called a codon and they define amino acids. There are 64 possible codons and the codon, AUG acts as the start codon which initiates translation in addition to specifying the amino acid methionine. In the initiation step, the first amino acid in the polypeptide chain is brought by transfer RNAs (tRNAs) to bind to the start codon of mRNA. During elongation, each type of tRNAs in the cytoplasm bound to a specific codon on the mRNA template and adds the corresponding amino acid to the polypeptide chain. Stop codons (UAA, UAG, or UGA) terminate protein synthesis and release the polypeptide.

8 0
3 years ago
4. Did the complete process of photosynthesis take place in the way you modeled it in this activity? Explain your answer.
Dafna1 [17]
Well I dont know exactly how you modeled your model in this activity (also, I notice this is a question from 2016), but I do know the two processes.

This is the process of making glucose in plants. Photosynthesis goes through two individual stages:  
Stage 1: L<span>ight dependent reaction</span> (depends on the presence of light; it can’t happen in the dark) 
Stage 2: Light independent (dark reaction) (works in the absence of light, but calling it a dark reaction might be misleading; It can just as well happen in the presence of light).
6 0
3 years ago
Blood type is determined by multiple alleles and can be used to determine the possible parents of an offspring. In this case, th
Tasya [4]

Answer:

think is b

Explanation:

sorry if im qrong

3 0
3 years ago
Read 2 more answers
What organ in your body produces bile?
Paha777 [63]
The Gallbladder stores bile that is produced in the liver
7 0
3 years ago
•PLEASE HURRY• In which phase of the eukaryotic cell cycle is the genetic material duplicated?
love history [14]

Answer:

D

Explanation:

Material is duplicated during Synthesis

5 0
3 years ago
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