Which of the statements below is/are correct, and which...

Which of the statements below is/are correct, and which is/are incorrect? 1-From the place on a chromosome where replication begins, the chromosome is replicated bidirectionally and on both strands. 2-DNA strands are "antiparallel." 3-The only way to go in both directions away from the beginning is to synthesize 5' to 3' on one strand, but 3' to 5' on the other strand. A. All three statements are incorrect. B. Statements 1 and 2 are incorrect; 3 is correct. C. Statement 1 is incorrect; 2 and 3 are correct. D. Statements 1 and 2 are correct; 3 is incorrect. E. All three statements are correct. A B C D E

Transcript

00:01 Okay, in order to set this question, how to talk about dna replication.

00:03 Remember that dna has two strands.

00:06 The first one goes from 3 -end to 5 -end, and the next one goes from 5 -end to 3 -end.

00:13 In order to start the dna replication, we have to find a site which in adenine and thiamine nucleotide because they are easier to open.

00:25 So, after finding those areas, this okay this this dna is going to open like this okay once it's opened and these areas here are going to be opened by an enzyme called elequase it is going to move forward and the strands are going to being open okay so the enzyme that is going to place the nucleotides is called dna polymerate okay and it places or it reads the strand the template strand greets strand from 3 to 5 and polymerizes from 5 to 3 okay so let's draw another strand here this is going to be the first strand that goes so the new strand is going to be it's going to be polymerized it remember that the elecases are opening the strand here and from 5 to 3.

01:51 Okay, this is going to be a strand that is 3 to 5.

01:55 So the dna polymerase is going to get in this sense and it's going to polymerize in this way.

02:01 Like towards the ellicase is opening this replication fork.

02:06 Okay, and what happens in the opposite strand? the opposite strand goes in this direction.

02:13 Okay.

02:14 So in this direction, dna polymerase is going to continue replicating from 5 to 3 in this direction.

02:21 Okay.

02:22 However, the legacy is opening in this direction.

02:25 So the dna polymer is going to move here as way as the dna is opening.

02:33 It's being opened.

02:34 Dna polymeris are going to move here and start polymerizing here.

02:38 Then we're going to move here and continue polymerizing and here and continue polymerizing and here and continue polymerizing...

Question

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