Ch. 15 - Recombinant DNA Technology and Its Applications

Sanders - Genetic Analysis: An Integrated Approach 3rd Edition

Sanders3rd EditionGenetic Analysis: An Integrated ApproachISBN: 9780135564172당신이 사용하는 게 아니라요?교과서 변경

Sanders 3rd Edition

Ch. 15 - Recombinant DNA Technology and Its Applications

문제 14

15장, 문제 14

A major advance in the 1980s was the development of technology to synthesize short oligonucleotides. This work both facilitated DNA sequencing and led to the advent of the development of PCR. Recently, rapid advances have occurred in the technology to chemically synthesize DNA, and sequences up to 10 kb are now readily produced. As this process becomes more economical, how will it affect the gene-cloning approaches outlined in this chapter? In other words, what types of techniques does this new technology have potential to supplant, and what techniques will not be affected by it?

검증된 단계별 안내

Understand the context: The question is about the impact of advances in DNA synthesis technology on gene-cloning techniques.

Identify traditional gene-cloning techniques: Techniques like restriction enzyme digestion, ligation, and transformation are commonly used in gene cloning.

Consider the impact of DNA synthesis: With the ability to synthesize long DNA sequences, some traditional cloning steps, such as assembling DNA fragments, might be bypassed.

Evaluate techniques potentially supplanted: Techniques that involve constructing DNA sequences from smaller fragments may be less necessary with direct synthesis of long sequences.

Identify unaffected techniques: Techniques that involve the expression of cloned genes in host cells or the study of gene function may remain unchanged, as they rely on biological processes beyond DNA synthesis.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Oligonucleotide Synthesis

Oligonucleotide synthesis refers to the chemical process of creating short sequences of nucleotides, which are the building blocks of DNA. This technology allows researchers to produce specific DNA sequences for various applications, including gene cloning, PCR, and DNA sequencing. The ability to synthesize oligonucleotides has revolutionized molecular biology by enabling precise manipulation of genetic material.

Polymerase Chain Reaction (PCR)

Polymerase Chain Reaction (PCR) is a widely used technique in molecular biology that allows for the amplification of specific DNA sequences. By using short oligonucleotide primers, PCR can exponentially replicate a target DNA segment, making it easier to study and manipulate. Advances in DNA synthesis technology can enhance PCR efficiency and enable the amplification of longer sequences, impacting gene-cloning strategies.

Gene Cloning Techniques

Gene cloning techniques involve the process of isolating and replicating specific genes to study their function or produce proteins. Traditional methods often rely on restriction enzymes and vector systems to insert DNA fragments into host organisms. As DNA synthesis technology becomes more economical, it may replace some of these traditional techniques, particularly in the initial steps of cloning, while still requiring established methods for integration and expression in host cells.

관련 실천

교과서 질문

Three independently assorting STR markers (A, B, and C) are used to assess the paternity of a colt recently born to a quarter horse mare. Blood samples are drawn from the mare, her colt, and three possible male sires (S₁, S₂, and S₃). DNA at each marker locus is amplified by PCR, and a DNA electrophoresis gel is run for each marker. Amplified DNA bands are visualized in each gel by ethidium bromide staining. Gel results are shown below for each marker. Calculate the PI and CPI based on these STR markers, using the following population frequencies: A₁₂ = 0.12, A₁₀ = 0.18; B₁₈ = 0.08, B₁₂ = 0.17; C₁₆ = 0.11, C₁₄ = 0.20.

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교과서 질문

Three independently assorting STR markers (A, B, and C) are used to assess the paternity of a colt recently born to a quarter horse mare. Blood samples are drawn from the mare, her colt, and three possible male sires (S₁, S₂, and S₃). DNA at each marker locus is amplified by PCR, and a DNA electrophoresis gel is run for each marker. Amplified DNA bands are visualized in each gel by ethidium bromide staining. Gel results are shown below for each marker. Evaluate the data and determine if any of the potential sires can be excluded. Explain the basis of exclusion, if any, in each case.

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교과서 질문

It is often desirable to insert cDNAs into a cloning vector in such a way that all the cDNA clones will have the same orientation with respect to the sequences of the plasmid. This is referred to as directional cloning. Outline how you would directionally clone a cDNA library in the plasmid vector pUC18.

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교과서 질문

The bacteriophage lambda genome can exist in either a linear form or a circular form.

Diagram the resulting fragments as they would appear on an agarose gel after electrophoresis.

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교과서 질문

The bacteriophage lambda genome can exist in either a linear form or a circular form.

How many fragments will be formed by restriction enzyme digestion with XhoI alone, with XbaI alone, and with both XhoI and XbaI in the linear and circular forms of the lambda genome?

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교과서 질문

The restriction enzymes XhoI and SalI cut their specific sequences as shown below:

Can the sticky ends created by XhoI and SalI sites be ligated? If yes, can the resulting sequences be cleaved by either XhoI or SalI?

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