Which of the following statements about telomeres is not...

Which of the following statements about Telomeres is NOT true? Telomere repeat sequences are determined by the RNA sequence in the Telomerase riboprotein. Telomerase extends one strand of the chromosome end. DNA polymerase is then required for synthesis of the other strand. Telomerase has an RNA-dependent DNA polymerase activity – meaning that it can synthesize DNA using an RNA template. Telomerase is a riboprotein, meaning that it has both RNA and protein components. Unlike DNA polymerase, Telomerase is able to synthesize DNA in the 5' to 3' direction.

Transcript

00:01 Okay, in order to answer this question about telomere, this is one chromosome.

00:06 A telomere is going to be this last part of this chromosome.

00:09 And normally, during each round of cell replication, these telomers are going to shorten.

00:18 Okay, they are shortening more, more, more, more, and once they disappear, then this cell is not going to replicate anymore.

00:26 Okay? so in order to prevent these telomers shortening so fast, we have an enzyme that is called telomerase.

00:35 And these telomeres, after each round of cell replication, they are going to build more telomers.

00:43 In order to increase the lifespan of these telomers, enhance also the ability for cell replication to cure for these cells.

00:52 So the question says, which is the following statements about telomers? not if this is your less graphic like your one telomere first imagine this is the 5 end and this is a 3 end of your telomere okay and you have here the 3 ends and here the 5 end okay so this part here has shortened because of the other replication so what your telomere is going to do is that it is going to place rna here okay rna here rna okay and what is this are what is going to do? well, this is a domain from the telomerate member.

01:32 It is going to synthesize dna polymerase, and it is going to synthesize the complementary nucleotides to this rna.

01:41 So it is going to increase the length of this arm here, okay, because of the function of dna polymerase, and it is going to increase the length of this dna molecule.

01:56 Okay, so this is what is going to happen.

01:59 Also, this as telomerase are going to move in this direction, pulling this rna in this direction, also in order to continue polymerizing here.

02:10 Then this rna domain is going to be removed, and dna primates is going to place a primer here, that comes from 5 to 3, and then dna polymerase is going to come and continue polymerizing in this way.

02:25 Ok, remember dna polymerizes from 5 to 3 in this direction...

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