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Biotechnology

Manipulating living organisms to produce a technical solution to a known problem.

3,003 Questions

What holds the beta sheets of protein together?

Hydrogen bonds between the amide nitrogen and carbonyl oxygen atoms of backbone strands hold beta sheets together. These bonds form between neighboring strands and help stabilize the secondary structure of the protein.

What did you set out to accomplish since last review?

Since the last review, I focused on improving my time management skills to meet deadlines more effectively. I also worked on enhancing my communication abilities by actively participating in team meetings and seeking feedback on my progress. Additionally, I dedicated time to strengthening my technical skills through online courses and practical projects.

Can plasmids mutate?

Yes, plasmids can mutate through various mechanisms such as point mutations, insertions, deletions, or recombination events. These mutations can affect the functionality of the plasmid or its ability to replicate and be maintained within a host cell.

How do you evaluate drift and noise in HPLC?

Noise and drift

In HPLC we deal with the time-dependent process. The appearance of the component from the column in the detector represented by the deflection of the recorder pen from the baseline. It is a problem to distinguish between the actual component and artifact caused by the pressure fluctuation, bubble, compositional fluctuation, etc. If the peaks are fairly large, one has no problem in distinguishing them. However, the smaller the peaks, the more important that the baseline be smooth, free of noise, and drift.

Baseline noise is the short time variation of the baseline from a straight line caused by electric signal fluctuations, lamp instability, temperature fluctuations and other factors. Noise usually has much higher frequency than actual chromatographic peak. Noise is normally measured "peak-to-peak": i.e., the distance from the top of one such small peak to the bottom of the next. Sometimes, noise is averaged over a specified period of time. Noise is the factor which limits detector sensitivity. In trace analysis, the operator must be able to distinguish between noise spikes and component peaks. A practical limit for this is a 3 x signal-to-noise ratio, but only for qualitative purposes. Practical quantitative detection limit better be chosen as 10x signal-to-noise ratio. This ensures correct quantification of the trace amounts with less than 2% variance. Figure below illustrates this, indicating the noise level of a baseline(measured at highest detector sensitivity) and the smallest peak which can be unequivocally detected.

Definition of noise, drift, and smallest detectable peak.

Another parameter related to the detector signal fluctuation is drift. Noise is a short-time characteristic of a detector, an additional requirement is that the baseline should deviate as little as possible from a horizontal line. It is usually measured for a specified time, e.g., 1/2 hour or one hour. Drift usually associated to the detector heat-up in the first hour after power-on. Figure also illustrates the meaning of drift.

How did scientists determine that DNA is responsible for storing copying and transmitting genetic information?

Scientists confirmed DNA's role in storing, copying, and transmitting genetic information through various experiments, such as the Hershey-Chase experiment in 1952. They showed that DNA, not protein, is the genetic material that carries hereditary information. Additionally, studies on DNA structure, like Watson and Crick's discovery of the double helix, further solidified our understanding of DNA's crucial role in genetics.

Why are bacteria treated with calcium ions and subjected to temperature shock?

Bacteria are treated with calcium ions and subjected to temperature shock to make them more permeable to foreign DNA, allowing for easier transformation with new genetic material. The calcium ions help destabilize the bacterial cell wall, while the temperature shock creates temporary pores in the membrane, facilitating the uptake of DNA molecules.

How does biotechnology impact the environment?

Biotechnology can have both positive and negative impacts on the environment. On the positive side, biotechnology can help create plants that are more resistant to pests and diseases, reducing the need for chemical pesticides. However, there are concerns about the potential for genetically modified organisms (GMOs) to affect natural ecosystems and biodiversity through cross-breeding or unintended consequences. Proper regulation and monitoring are important to ensure that biotechnology is used responsibly to minimize its negative environmental impact.

Why Carl Neuberg is called father of biochemistry?

Carl Neuberg is considered the father of biochemistry because of his significant contributions to the field, particularly in the study of intermediary metabolism and enzyme activity. He helped establish biochemistry as a distinct discipline by focusing on the chemical processes that occur within living organisms. Neuberg's pioneering work laid the foundation for modern biochemistry.

Why use touchdown PCR?

Touchdown PCR can help optimize PCR conditions by gradually lowering the annealing temperature in a series of cycles. This can improve specificity by minimizing nonspecific amplification and increasing yield of the desired product. Additionally, touchdown PCR can reduce the formation of primer dimers and increase the chance of successful amplification of GC-rich or AT-rich regions.

Which are differences between dominant and codominant marker?

Dominant markers show only the dominant allele and mask the recessive allele, while codominant markers show both alleles separately. With dominant markers, heterozygotes can't be distinguished from homozygous dominant individuals, while with codominant markers, heterozygotes display a distinct phenotype from homozygous individuals. Dominant markers are easier to interpret but may not provide as much information as codominant markers.

How do you prepare 10mM Tris?

To prepare 10mM Tris solution, first calculate the amount of Tris base needed based on the molecular weight of Tris (121.14 g/mol). Weigh out the appropriate amount of Tris base and dissolve it in water to make a final volume of 1L. Adjust the pH to the desired value if necessary.

What is the difference between Wright stain and Giemsa stain?

The Wright stain is a combination of eosin and methylene blue dyes, while Giemsa stain is a mixture of eosin, methylene blue, and azure dyes. Giemsa stain is commonly used for staining blood smears to visualize parasites and bacteria, while Wright stain is used more for general cell morphology in blood and bone marrow specimens.

Who was the first person to come up with the ideal of designer babies?

The concept of designer babies, or genetically engineered babies, is typically traced back to the British biologist J.B.S. Haldane in the 1920s. He discussed the potential for using genetic manipulation to create humans with specific desirable traits.

What kind of problems does technology creates?

If you have a lot of technology you can get dependent and if that technology would ever break down for a time period then you might find yourself lost and not be able to do certain tasks like talk to your friends and family because you can't email them because your computer doesn't work or the internet is down. You might not be able to pay for your purchases because the credit card machine isn't working.

Technology also creates laziness. when there is quick technology you tend not to do things the "old fashion" way like doing your taxes with the paper, calculator and manual. with technology those taxes could be filed in 15 minutes on the internet.

hope this helped!! :)

How do you prepare a cotton plug for conical flask?

To prepare a cotton plug for a conical flask, take a small piece of cotton wool and roll it between your fingers to create a plug. Ensure that the plug is slightly larger than the opening of the flask so that it fits snugly when inserted. Wet the cotton plug with distilled water or the appropriate solution to help it stay in place and create a seal.

What is the result for egg in vinegar?

When an egg is placed in vinegar, the outer shell dissolves due to the acidic nature of the vinegar. This leaves behind a semi-permeable membrane that allows for the exchange of certain substances, resulting in a rubbery, bouncy texture due to the changes in osmotic pressure and chemical composition.

What is are secondary databases in bioinformatics?

Secondary databases in bioinformatics are databases that provide curated information derived from primary sources such as research articles and other databases. They often offer organized, processed, and annotated data, making it easier for researchers to access and utilize biological information for further analysis and interpretation. Examples of secondary databases include UniProt, NCBI Gene, and KEGG.

What do you call a half machine half human?

A half machine, half human is commonly referred to as a cyborg, which stands for cybernetic organism. Cyborgs have both organic and biomechatronic body parts.

What is the complementarty sequence for a segment of DNA with the sequence acggct?

The complementary sequence would be tgccga. In DNA, adenine pairs with thymine (A-T) and guanine pairs with cytosine (G-C), so the complementary bases for A, C, G, and T are T, G, C, and A respectively.

What is embryo culture in plants?

Embryo culture in plants involves isolating and growing an immature embryo in a nutrient medium under sterile conditions. This technique is commonly used in plant breeding to rescue embryos that are difficult to germinate in natural conditions, as it allows for the production of genetically uniform plants in a short period of time. Embryo culture can also be utilized for the propagation of rare or endangered plant species.

What matric subjects do you need to study biokinetics?

To study biokinetics, it is recommended to take subjects such as Mathematics, Physical Sciences, and Biology in high school. These subjects provide a solid foundation in the relevant scientific principles required for a career in biokinetics. Additional subjects such as Life Sciences and Physical Education may also be beneficial.

What is the effect that enzymes have on certain chemical reactions in living things?

Enzymes lower the activation energy (or free energy of activation for the very scientific) of the chemical reactions they catalyse. The enzymes can make a reaction proceed much more quickly than it otherwise would by astronomical figures, e.g. 109 times! Enzymes don't affect the equilibrium position, but they do affect the rate.

What is the importance of friable callus in organogenesis?

A friable callus is a callus formation that has grown with the cells further apart. When a callus is not friable, it is dense and compact and when it is used to regenerate plant tissue, it grows into a lump and doesn't grow to a viable plant. A friable callus, however, allows the regenerating tissue to grow suspensions.

What does the word vector mean in the field of biotechnology?

In the field of biotechnology, a vector is a DNA molecule used to transfer foreign genetic material into a host organism, such as a bacterium or plant cell. Vectors are commonly used in genetic engineering and gene therapy to introduce specific genes into target cells for various purposes.

What is the correct sequence of events that occur in a PCR reaction?

In a PCR reaction, the correct sequence of events is denaturation, annealing, and extension. Denaturation involves heating the DNA to separate the strands. Annealing involves cooling the reaction so primers can bind to the DNA. Extension involves DNA polymerase synthesizing a new strand of DNA using the primers as templates.