How does dna polymerase prevent mutations? a. it checks amino acids during protein synthesis. b. it uses translation and transcription. c. it checks dna for errors during replication. d. it creates extra copies of each dna.

(C). It checks DNA for errors during replication.

Explanation:

DNA polymerase is an enzyme that synthesizes the daughter DNA strands from parent DNA molecule at the time of DNA replication. It has both polymerase and proofreading activity.

The proofreading activity of DNA polymerase is responsible for the prevention of mutations that arise during replication.

Once a DNA polymerase detects an incorrect nucleotide base in growing chain, it stops replication and removes the incorrect nucleotide by exonuclease activity and prevents mutations.

Thus, the correct answer is option (C).

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

d. organisms have cells with different shapes and functions.