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Vinvika [58]
3 years ago
10

The possibility of magnifying contaminating sequences present in a nucleic acid pool is a drawback associated with PCRs high lev

el of sensitivity (i.e., potential for exponential amplification).
A. True
B. False
Biology
1 answer:
lukranit [14]3 years ago
6 0

Answer:

True

Explanation:

The Polymerase Chain reaction (PCR) is a technique widely used in molecular biology to identify specific DNA fragments generally in a size range of 100 to 1000 base pairs (bp). PCR sensitivity refers to the potential of the PCR technique to specifically amplify the desired sequence in the sample. PCR is a highly sensitive (and also specific) method with values around 100% if the experimental conditions are proper. However, to reach these values, it is imperative to work in optimal conditions by eliminating contaminant factors in the sample which may alter PCR amplification.

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Write down three problems caused by expansion or contraction.how are these problems overcome?
masya89 [10]

Answer:

The problems that can be caused by Expansion or Contraction a;long with the solutions are:

Explanation:

  1. The railway tracks made of steel expand during the summer and contract during the winter. This can cause them to become curved during the summer thereby causing rail derailment.In order to prevent this, an air gap is kept in between the railway lines so that they get the space to expand without getting curved.
  2. The electric wires linking the telegraph posts are made up of metals and so they expand in the summer and contract in the winter, which can cause them to tear. This is why the wires are loosely fixed so that they can expand and sag in the summer and contract and tighten in the winter.
  3. Bridges are constructed with joints where some space is maintained to allow the easy expansion and contraction in summer and winter respectively.
4 0
3 years ago
Which individual is shown in the karyotype? male with Turner syndrome male with Klinefelter syndrome female with Turner syndrome
irinina [24]

Answer:

Male with Turner syndrome has 44 autosome with X (monosmy) and female has 44autosomes with XO( female).

Male with klinefelter syndrome has 44+ XXY. this is mainly in males

8 0
3 years ago
why do polysaccharides like cellulose and peptidoglycan able to resist degradation and enzymatic activity
mixer [17]

Polysaccharides like Cellulose form insoluble micro-fibrils making it resistant to degradation and enzymatic activity.

<u>EXPLANATION: </u>

  • Polysaccharides components in general broken down monosaccharides and they are very little enough to be absorbed by the body.
  • But the polysaccharide like cellulose cannot be absorbed by our body.
  • Cellulose is made up of simple polymers that form insoluble micro-fibrils results in resistant to degradation and enzymatic activity.
  • Also, molecules of each micro-fibril are so tightly packed structure and prevent the penetration of enzymes.
  • Thus, cellulose degradation requires a complex enzyme and cellulose.
7 0
3 years ago
Describe one way osmosis and osmotic pressure is important to medicine.
OleMash [197]

Answer:

Since the beginning of life of the first multicellular organisms, the preservation of a physiologic milieu for every cell in the organism has been a critical requirement. A particular range of osmolality of the body fluids is essential for the maintenance of cell volume. In humans the stability of electrolyte concentrations and their resulting osmolality in the body fluids is the consequence of complex interactions between cell membrane functions, hormonal control, thirst, and controlled kidney excretion of fluid and solutes. Knowledge of these mechanisms, of the biochemical principles of osmolality, and of the relevant situations occurring in disease is of importance to every physician. This comprehensive review summarizes the major facts on osmolality, its relation to electrolytes and other solutes, and its relevance in physiology and in disease states with a focus on dialysis-related considerations.

3 0
2 years ago
A bird is flying in the air at a 4 m/s. If the mass of the bird is 7kg what is it’s kinetic energy
yaroslaw [1]

Answer: The kinetic energy of the flying bird is 56 Joules.

Explanation:

Mass of the bird  = 7 kg

Velocity of the flying bird = 4 m/s

Kinetic energy of the bird will be given by :

K.E.=\frac{1}{2}mv^2

K.E.=\frac{1}{2}\times 7 kg\times (4 m/s)^2=56 Joules

The kinetic energy of the flying bird is 56 Joules.

4 0
2 years ago
Read 2 more answers
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