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a) Assume that RNA polymerase will read the top strand of DNA as the “template” to synthesize mRNA. What will be the sequence of the mRNA synthesized? (3 points)…
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RNA: RNA is similar to DNA except that instead of deoxyribose as the sugar, it has ribose. It is single stranded, and instead of thymine, there is uracil. There are 3 forms involved in polypeptide synthesis:mRNA: Messenger RNA carries the genetic code outside the nucleus, into the cytoplasm, where it can be read by ribosomestRNA: Transfer RNA carries the amino acids to the ribosomes to link and form a polypeptide chain. tRNA are shaped like clover leaves; there is a different type for every amino acid. At the bottom of every tRNA molecule is an anti-codon that binds to the codon on the mRNA strand. That is how the amino acid is linked to the codon.…
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During transcription, the information in the DNA of a specific gene is copied into mRNA (messenger RNA), which creates a nucleotide sequence. After transcription, if the DNA base sequence is 3’-TACCCTTTAGTAGCCACT-5’, then the base sequence of mRNA would be 5 '-AUGGGAAAUCAUCGGUGA-3’.…
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1. The primary structure of a protein represents: (*) the amino acid sequence. (2) the functional configuration. (3) the subunits of a protein. (4) a pleated sheet. (5) a alpha helix. 2. In prokaryotes, most genes are organized into operons. One component of an operon is the structural genes. Which of the following best describes a structural gene? (*) a sequence of DNA that specifies a polypeptide. (2) a sequence of DNA that produces tRNA's. (3) a sequence of DNA that interacts with the small ribosomal subunit. (4) a sequence of DNA that is recognized by RNA polymerase. (5) a sequence of DNA that is involved in forming the structure of a double helix molecule. 3. Identify the correct sequence of steps in protein synthesis in prokaryotes: A - binding of large ribosomal subunit to initiation complex B - peptide bond formation C - binding of mRNA to small subunit of ribosome D - binding of charged tRNA to A site E - release of fmet-tRNA and translocation (1) B, C, A, D, E (2) B, E, C, A, D (3) C, E, B, A, D (*) C, A, D, B, E (5) C, D,…
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TRANSCRIPTION: Transcription is the process of which DNA matches corresponding RNA bases, Transcription is located in the Nucleus, and the only type of RNA that is involved in Transcription is mRNA, and the purpose is so that the code can get out of the Nucleus, mRNA is also made through Transcription, It also takes information that doesn't directly make proteins but it helps makes codes for the production of proteins, DNA Transcription consist of 4 nucleotide bases, Adenine, Thymine, Cytosine, Guanine. Transcription also unwinds the strand of DNA and the RNA comes in and matches then becomes a single strand. The only thing that changes during this process is the Thymine gets replaced with Uracil.…
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DNA stands for Deoxyribonucleic acid and looks like a spiral. The spiral is also known as a double helix. The strands are made up of our genetic information, composed of genes and chromosomes. There are four bases divided among purines and pyrimidines. On the purines there are Adenine (A) and Guanine (G). On the pyrimidines there are Cytosine (C) and Thymine (T). The base pairs are Adenine and Thymine (A-T) and Cytosine and Guanine (C-G). DNA is found in the nucleus of every human cell. Humans have 46 chromosomes. When a cell reproduces, the chromosomes get copied and distributed to each offspring.…
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1. Describe the three parts of a nucleotide and how they bond to form a nucleotide.…
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DNA is composed of two polynucleotide strands wound together into a structure known as a double helix. Each nucleotide consists of a sugar base .Nucleotides form together creating a sugar phosphate backbone to each strand. There are three forms of DNA that differ significantly. The most common, B form, is the structure most people have heard of. It consists of the right handed double helix, with a large major groove and a smaller but accessible minor groove. These grooves are spaces between the backbones which allow access to the bases for interactions with proteins. A form DNA is also a right handed helix, but as yet has not been found in organisms, and only exists in synthetic environments. It has a wider, flatter structure. Z form DNA is found in living organisms, but is a left handed helix, meaning it twists in the opposite direction.…
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The flow of information starts with transcription. Within transcription, the DNA molecule holds a nucleotide sequence called the promoter that the RNA polymerase attaches to and begins the RNA synthesis. Through the process of transcription, the RNA strand becomes longer and finally detaches from the DNA strand, wherein the two DNA strands come back together forming the previously continuous strand. At this point the RNA turns…
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DNA is typically has two strands running in opposite direction and is usually referred to as a double helix. Each on the individual strands consists of a backbone that is formed by sugar molecules linked together in groups. Each individual sugar molecule is covalently linked to one of the following possible bases: Adenine, Guanine, Cytosine and Thymine. These bases are typically aligned perpendicular to the axis of the strand. As previously stated the strands run in opposite directions with the bases paired up with Adenine always with Thymine and Guanine always with Cytosine. Theses pairs form hydrogen bonds with the A/T pair having 2 and the G/C pair having 3. The extra hydrogen bond makes the G/C pair stronger.…
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The genotype is the genetic makeup of a cell, an organism, or an individual, Where as a…
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Describe the structure of DNA.DNA is thread formed by two strands, related together to form a double helix. The double helix looks like a twisted ladder. The sides of this ladder are long unites called nucleotides and are made of three parts; a nitrogenous base, a sugar, and a phosphate group. The sides of the ladder or the nucleotides from the two separate strands of the DNA are attached by an appendage made of one of four separate bases. These appendages represent the rungs of the DNA ladder and are attached to the complimentary strand of the DNA. The bases or rungs are made of either Adenine (A) OR Thymine (T) or Cytosine (C) and Guanine (G). The attachment of the strands by the bases is specific Adenine can only join with Thymine, and Cytosine can only join with Guanine. Since this base pairing is specific, if one knows the sequence of bases a long one strand of the DNA one will also know the strand of the DNA one will also know the sequence along the complimentary strand.…
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The flow of information from gene to protein is based on the triplet code. The genetic instructions for the amino acid sequence of a polypeptide chain are written in DNA and RNA as a series of three-base words called codons. The three-base codons in DNA are transcribed into complementary three-base codons in RNA, and then the RNA codons are translated into amino…
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The mRNA encodes the amino acid sequence of a protein. During the translation, ribosomal RNA combines with other proteins to form a ribosome which amino acids are transported to the ribosome. The combination of mRNA and tRNA converts the mRNA into the amino acid sequence of the protein.…
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The uppermost strand in this structure is called the coding strand. The second strand that lies below the coding strand is called the template strand. In order for a RNA polymerase to go from the upper strand to the second strand it must go through the process called transcription. First, the RNA polymerase must attach on to one of the genes on the coding strand on DNA. Once the RNA polymerase attaches, it must then begin the process called initiation. This means that the RNA polymerase opens up both strands of DNA in order for mRNA synthesis to begin as it moves down the template strand. Once it starts moving down the template strand, that’s when elongation occurs. This is when the RNA polymerase unwinds the DNA helix in front of it and rewinds the helix behind it matching each base with its correct partner. Once the RNA polymerase reaches a special base sequence called termination signal, transcription is then over. This is called termination. The row of “guitars” represents the sequence in the tRNA anticodons. The tan balls on the bottom of the “guitars” represent the amino acids in the polypeptide chain. The multi-color piano keys represent the different bases that are in DNA and RNA molecules. What is different in the second strand than the first upper strand is that the second strand is mRNA which contains the base Uracil while the first strand is DNA and contains Thymine instead of Uracil. The difference between the second strand and the “guitars” is that the second strand is mRNA which are codons while the “guitars” are tRNA and are anticodons. The difference in the sequence between the first strand and the “guitars” is that the first strand is triplets which contain Thymine and the “guitars” are anticodons and instead of Thymine, they contain Uracil. The process going from the second strand to the “guitars” is called translation. This is where the language of nucleic acids is translated into the language of proteins in which they are used to assemble…
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