then used as input for translation after exon-intron splicing. The addition of successive tRNA molecules based on the code of mRNA matched up by base-pairing through their anti-codons in the ribosomes creates the nascent protein. After the protein chain has been synthesized, post-translation modification occurs, e.g. phosphorylation, motifs added to the protein. This may happen at various levels: secondary (alpha-helix, beta-sheets, turn, random coiling), tertiary and quarternary. Protein synthesis
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How has our knowledge of DNA improved the study of criminal forensics? Introduction Through genetics, the study of DNA, we are able to figure out what and how genes are responsible for many things like our hair color or why do some people look a lot like their parents and others don’t. It also allows us to understand better how species evolve and how are they related to each other. It is important to understand how DNA mutates, changes and replicates in order to get information about what mechanisms
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of the mRNA, while the large subunit catalyzes the formation of the peptide bonds that link the amino acids together into a polypeptide chain. As its codons enter the core of the ribosome, the mRNA nucleotide sequence is translated into an amino acid sequence using the tRNAs to add each amino acid in the correct sequence to the growing end of the polypeptide chain. When a stop codon is encountered, the ribosome releases the finished protein, and its two subunits separate again. These subunits can
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cell known as a(n) A) gamete. B) zygote. C) embryo. D) clone. E) fetus. 2. Repressor proteins A) prevent binding of RNA polymerase to DNA. B) can be inactivated by an inducer (lactose). C) provide negative control D) prevent binding of RNA polymerase to DNA and can be inactivated by an inducer such as lactose. E) prevent binding of RNA polymerase to DNA. can be inactivated by an inducer such as lactose, and provide negative control. 3. During genetic modification, A) a prokaryote
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Answer. b (3). The large eukaryotic rRNA genes,such as 18 S and 28S RNA encoding genes, are transcribed by which of the following RNA polymerase a. RNA polymerase III b. RNA polymerase I c. RNA polymerase II d. Mitochondrial RNA polymerase Solution. 1) Ans is b: RNA polymerase I RNA polymerase I : rRNA RNA polymerase II: mRNA. mi RNA RNA polymerase III: tRNA, 5S rRAN , Sn RNA Correct Answer. b Copyright © 2014 Delhi Academy of Medical Sciences, All Rights Reserved. 2/17 (4)
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presence (+) or absence (-) of the alu on every paired chromosome. Therefore, it has three different genotypes, which are (+,-), (-,-), and (+,+). Alu elements are classified as SINEs, or Short Interspersed Elements that are transcribed by RNA Polymerase III. Biochemists are still trying to determine the origin and exact function of the Alu sequences. So far, the Alu gene characteristics are only useful when present within introns of specific genes. The combination of the Alu and introns can
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scenes, the amount of DNA available for DNA fingerprinting is extremely small. Fortunately, a molecular biology technique known as polymerase chain reaction (PCR) allows the DNA sample to be amplified considerably. In essence, this technique is an artificial version of DNA replication. The DNA sample is firstly added to a mixture of DNA nucleotides and DNA polymerase that is then heated 95°C. This high temperature breaks the hydrogen bonds holding the two strands of DNA together. The sample DNA is
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sample 2. What does PCR do, how does it work, and why is it useful? PCR is also known as the Polymerase Chain Reaction, it is a fast and inexpensive way to amplify small segments of DNA (genome.gov). PCR works by amplifying a segment of DNA, the sample is heated first the DNA denatures, or separates into two pieces of single-stranded DNA (genome.gov). After that an enzyme called Taq polymerase synthesizes builds two new strands of DNA, it uses the original strands as templates (genome.gov).
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Creative Technology Exam 2 Study Guide 1) Uses a promoter- transcription 2) An anticodon is involved in this process - translation 3) Codons are involved - translation 4) Uses DNA Polymerase- replication 5) Polymerase chain reaction is a “synthetic” version of this 6) RNA polymerase is used - transcription 7) Ribosomes are used- translation 8) tRNA is used - translation 9) mRNA is produced - transcription 10) mRNA is read - translation 11) Important when
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initiation point of the 3’ – 5’ parent chain. It can attract RNA nucleotides which bind to the DNA nucleotides of the 3’ – 5’ strand due to the hydrogen bonds between the bases. RNA nucleotides are the primers (starters) for the binding of DNA nucleotides. 6. DNA Polymerase III (enzyme) link up the free, matched nucleotide triphosphates by removing the terminal di-phosphate and using energy so released to carry out the very non-spontaneous chemical reaction of joining the phosphate to the deoxyribose
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