Biology

Biology, 12.09.2019 22:30, stodd9503

The bases of one of the strands of dna in a region where dna replication begins are shown here. what is the sequence of the primer that is synthesized complementary to the bases in bold? (indicate the 5' and 3' ends of the sequence.) 5' 3'

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Biology, 26.06.2019 01:00, Jenniferlam12

What must be transmitted to new dna strands during replication to maintain genetic information? a. individual sugars from existing dna strands b. the sequence of bases from existing dna strands c. the sequence of phosphate from existing dna strands

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Biology, 02.07.2019 02:30, ahmedeldyame

Researchers performed an experiment to investigate dna replication. first, they synthesized radioactively-labeled nucleotides, which are nucleotides that contain radioactive elements that allow them to be visualized. then, they inserted the radioactively-labeled nucleotides into a cell. when the cell divided, it incorporated the radioactively-labeled nucleotides into its dna during dna replication. the following image shows the cell's dna before and after replication. the original dna strands are shown in blue and the dna strands with the radioactively-labeled nucleotides are shown in orange. which statement is best supported by the results of this experiment? a. cell division produces four identical dna strands. b. several proteins are involved in dna replication. c. dna replication is a semiconservative process. d. the two dna strands are replicated in opposite directions.

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Biology, 06.09.2019 16:20, BaileyElizabethRay

1. because the 2 strands of a dna molecule run in opposite directions, they are said to be bidirectional. 2. dna polymerases can add new dna nucleotides only to the 5' end of an existing strand. 3. because the 2 strands of a dna molecule run in opposite directions, and because dna polymerases can synthesize new strands only in the 5' to 3' direction, polymerases on opposite strands must synthesize dna in opposite directions. 4. the dna strand that grows away from the replication fork is synthesized continuously from one initial primer. 5. the dna strand that grows toward the replication fork is synthesized discontinuously in short pieces called okazaki fragments. 6. each okazaki fragment has its own primer. 7. the dna strand that is synthesized continuously is called the lagging strand. 8. the dna strand that is synthesized discontinuously is called the leading strand. 9. dna ligase joins adjacent okazaki fragments together into a complete strand. 10. dna polymerases cannot initiate synthesis of a new dna strand; they can only add bases to an existing strand. true or false

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Biology, 10.10.2019 17:00, giannimaraj711

As the two parental (template) dna strands separate at a replication fork, each of the strands is separately copied by a dna polymerase iii (orange), producing two new daughter strands (light blue), each complementary to its respective parental strand. because the two parental strands are antiparallel, the two new strands (the leading and lagging strands) cannot be synthesized in the same way. drag each phrase to the appropriate bin depending on whether it describes the synthesis of the leading strand, the synthesis of the lagging strand, or the synthesis of both strands. a. multiple primers needed b. daughter strand elongates toward replication fork c. only one primer needed d. synthesized 5' to 3' e. daughter strand elongates away from replication fork f. made continuously g. made in segments

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The bases of one of the strands of dna in a region where dna replication begins are shown here. what...

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