Kary mullis discovered a type of dna polymerase that could withstand high temperatures. why did scientists want to heat up dna replication?
a. to slow the reaction down
b. to make the reaction go faster
c. to prevent frameshift mutations
d. to kill the bacteria replicating the dna

Ans. (b). to make the reaction go faster.

Kary Mullis discovered a thermostable enzyme, named as Taq polymerase, named after the bacterium, Thermus aquaticus, from which it was isolated.

Taq polymerase is used in PCR (polymerase chain reaction) to make copies of sample DNA. During PCR, after each round of amplification, the PCR mixture is heated above 90° C to unwind the newly formed DNA, permitting separation of DNA strands to act as template for next round of replication.

If one uses normal DNA polymerase in PCR, it requires addition of new enzyme after denaturation phase of each cycle as it gets denatured at high temperature. On the other hand, Taq polymerase functions properly at high temperature, eliminates the need to add new polymerase enzyme to each cycle and makes the reaction faster.

Thus, the correct answer is option (b).

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what the squwock

explanation:

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.