Answer:
Polymerase chain reaction (PCR) test is used to duplicate traces of DNA from any living form, for identification purposes. The correct sequence is 1, 3, 2; based on the options given.
Explanation:
The steps to be followed for the PCR procedure are:
<em>Denaturation</em>
Option 1. Involves incubation at 94°C to denature DNA strands into single strands by breaking of weak hydrogen links
<em>Annealing</em>
Option 3. Temperature is lowered to 60°C to allow primers joining their similar DNA sequences.
<em>Elongation</em>
Option 2. Incubate at 72°C to promote the extension of the DNA strands, actually extending them.
Answer:
The correct answer is: True.
Explanation:
- The writing of a person is controlled by an region located in the left part of frontal lobe of the brain which is known as the Broca's area.
- Writing is a motor impulse send by the brain to the hand and fingers.
- However, no two individual can have the same hand-writing.
- This is because hand-writing is not only dependent on the brain to hand motor co-ordination.
- It also depends upon the psychology, mentality, thought process, state of mind, nature of the person and also the influence of the surroundings on the person.
- It also depends on the preference of the person to keep his writing artistic or simple or illegible.
- All these factors can never match between two persons.
- This is the reason, no two persons can share the exactly same hand-writing.
The best and most correct answer among the choices provided by your question is the fourth choice or letter D.
The cell would lose structure and shape when the ribosomes of a cell were damaged and stopped functioning.
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Answer:
Within the geological structure of Cayuga Lake Basin there is a diversity of limestone sources, which would make it possible for the lake to be a good location for the construction of a cement-making plant.
Explanation:
Cayuga Lake, part of the so-called Finger Lakes, located in New York, has an extension of about 40 miles. This lake is of great economic and ecological importance, because it allows fishing and recreation activities, besides being a place of passage for migratory birds.
The Skaneateles, Onandaga, Marcellus, Manilius, Moscow and Tully formations are an important source of limestone of variable quality, from which lime can be obtained for the manufacture of cement.
Although the presence of limestone would be ideal for building a cement-making plant, a project of this size should consider the environmental impact it could have.
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Answer
The key markers for the identification of bacteria are special RNA polymerase, peptidoglycan in cell walls. ester-linked fatty acids.
Explanation:
