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What is the difference between antigenic and phase variation?
MayaChoudry
The Phase Variation is the reversible ability of some bacteria to turn an and off the expression of genes coding for the surface antigens .
While the Antigenic Variation is the modification of the gene for an expressed surface antigen by genetic recombination with one of many variable unexpressed DNA sequences.
In this manner , the expressed surface antigen can assume many different antigenic structures
Wiki User
∙ 12y ago
Antigenic variation involves changes in surface antigens on a microorganism to evade the host immune response, while phase variation involves reversible on/off switching of certain genes to alter the expression of specific surface molecules. Both mechanisms contribute to pathogen adaptation and immune evasion.
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What is the difference between inter phase and and mitotic phase?
Interphase is the phase of the cell cycle where the cell grows, replicates its DNA, and prepares for cell division. Mitotic phase is the phase of the cell cycle where the cell divides into two daughter cells through mitosis and cytokinesis. Interphase is longer and includes G1, S, and G2 phases, while mitotic phase includes prophase, metaphase, anaphase, and telophase.
Recombination occurs during which process?
Recombination occurs during meiosis, specifically during the crossing over phase of prophase I. This process involves the exchange of genetic material between homologous chromosomes, leading to genetic variation in offspring.
What is different between analysis phase and synthesis phase?
The analysis phase involves breaking down information into smaller parts and understanding the relationships between them. In contrast, the synthesis phase involves combining different elements or ideas to create new or improved solutions to a problem. Analysis focuses on understanding the problem, while synthesis focuses on generating solutions.
Fill in the blank The G0 phase can occur before the phase?
The G phase of the cell cycle is split into two sub-phases: the G1 and G2 phases. In between these two phases is the S phase (the synthesis phase). One can say the G phase (or the first of the two G sub-phases) occurs before the S phase.
What is the difference between replicated chromosomes and unreplicated chromosomes in DNA?
Replicated chromosomes have undergone DNA replication, producing two identical sister chromatids joined by a centromere. Unreplicated chromosomes have not undergone DNA replication and consist of a single chromatid. Replicated chromosomes are found during the S phase of the cell cycle, while unreplicated chromosomes are present in the G1 phase.
What is the importance of phase variation in bacteria?
Phase variation in bacteria allows for rapid adaptation to changing environments by altering surface structures or gene expression. This can help bacteria evade the host immune response, colonize different niches, or switch between different forms of growth or pathogenicity. Understanding phase variation is important for developing effective strategies to combat bacterial infections.
What is the relation between the path difference and phase difference?
The phase difference between two waves is directly proportional to the path difference between them. The phase difference is a measure of how much the wave has shifted along its oscillation cycle, while the path difference is a measure of the spatial separation between two points where the waves are evaluated.
Is there a difference between three phase and single phase electrical supplies?
Yes, there a difference between three phase and single phase electrical supply services.
How do you measure phase difference between 2 pendulums?
You can measure the phase difference between 2 pendulums by measuring the distance between the two. The amount it comes out to will be the difference.
What is the difference between cw and steady at lock-on phase?
What is the difference between cw and steady at lock-on phase? I don't know.
What is difference between a phase and a phase transition?
a phase is a region with homogeneous (uniform) properties and a conversion between states is called a "phase transition"
What is Phase difference between two points on wave front?
Phase difference between two points on a wavefront refers to the difference in phase angles at those points. It signifies the amount by which the phase of one point on the wavefront lags or leads the phase of another point. This phase difference can determine aspects like interference patterns and wave behaviors.
Single phase and three phase circuit?
Yes, there is a difference between single phase and three phase circuits.
What is the difference between frequency modulation and phase modulation?
The difference between frequency modulation and phase modulation is that with frequency modulation the angular frequency of the signal is modified while with the phase modulation, the phase angle of the signal is modified.
What is the difference between one point of the wave to another point of the wave?
The difference between one point of a wave and another point is the phase difference, which reflects how much the wave has shifted in terms of position or time. This phase difference determines whether the points are in phase (crest aligns with crest or trough with trough), out of phase (crest aligns with trough), or somewhere in between.
What is difference between cooler and condenser?
Type your answer here... the basic difference is the phase of the material which is to be cooled i.e.in condencer it is in vapour phase & in cooler it is in liquid phase.
What is Physical interpretation of in phase and out of phase?
Two locations are said to be "in phase" when the waveform is "lined up" so there is no voltage difference between the two points.They are out of phase if there is a voltage difference between them.If you are looking at an oscillograph reading of both, if they are in phase the waveforms will be identical magnitude at the same time. If out of phase, one will be shifted relative to the other causing a voltage difference.
