The autoimmune disease that results from the body attacking tissues such as the heart or lungs is called

Arrange the following in the proper sequence in which they occur during a single PCR cycle.

Tju [1.3M]

Answer:

C. 3, 2, 1

Explanation:

During a single PCR cycle, the very first step is the heat separation of the double stranded DNA. Primer binds only single stranded DNA/RNA because it has complimentary bases which match single strand of DNA/RNA that is why it is necessary to unwind both the strands of DNA by providing temperature.

As soon as the DNA strands have separated by increasing the temperature to ~ 95 °C, in the next step the primer binds the portion of DNA which is complimentary to the bases of the primer. In order for primer to bind DNA, the temperature is lowered to ~ 72 °C and the process is called as annealing.

Once primer has bound to the DNA, the next step is polymerization i.e. nucleotides which are the monomer units of DNA are added one by one with the help of enzyme named as Taq polymerase. This is how the strand extends ahead of primer and exact copies of the given DNA are produced.

Note: PCR may be considered as in vitro DNA synthesis or replication.

5 0

3 years ago

A student brings two rock samples to class. Rock 1 has very small mineral grains that can only be seen with a hand lens. Rock 2

Hitman42 [59]

Answer:

Rock 1 is older than Rock 2, and the mineral grains became smaller over time.

Explanation:

i just took the test.

6 0

3 years ago

When an ant in a colony dies, the live ants will

hjlf

The answer is 4, because if the ants smell the same dead smell on this particular ant in the colony, their initial reaction is to eliminate it. The chemical sprayed upon the ant acts as a stimulus for a particular behavior.

6 0

4 years ago

Can somone help me plzzzzzzzzzzzzz

tekilochka [14]

Answer:

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