Biology, 30.06.2019 22:30 venancialee8805

Dna can make exact copies of itself through replication because the nitrogen bases always pair

Answers: 1

Show answers

Answers

Answer from: tristina20

*What does replication mean?

Replication means to make an exact copy of itself. Like clones, or identical twins.

*Why would a cell need to replicate (make copies) of its DNA?

Our cells are always dividing and making new cells. Replication occurs before a cell divides so that each new cell will have the exact DNA as the original (parent) cells. Replication ALWAYS occurs in the nucleus of the cell.

Because of DNA's structure it can be copied or replicated. Each strand of the DNA double helix has all the information needed to reconstruct the other half by base pairing. Adenine will bond with thymine and guanine will bond with cytosine.

In Eukaryotes, DNA replication occurs at hundreds of places in both directions at the same time. It has been found to only take 3 minutes for a strand of DNA to be copied.

Replication is also very accurate. 1 error per 10,000 paired nucleotides. The cell has enzymes that proofread DNA and repairs errors as it builds the new strands of DNA during replication.

GOAL OF DNA REPLICATION:

Parent (original) DNA will separate at the hydrogen bonds where the nitrogen bases are attached into 2 single strands. Imagine taking a ladder and sawing it down the middle through all the steps.

Those half strands will make templates for the new strands to be made.

Now the original nitrogen bases no longer have their pair next to them.

New nitrogen bases will come in and fill the spots following base pairing rules (A-T, G-C)

2 (two) new strands of DNA will be created identical to the original.

Each of the new strands will have HALF of the ORIGINAL, and HALF brand NEW.

Answer from: Quest

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.

Answer from: Quest

The answer would be sand and gravel

Another question on Biology

Biology, 22.06.2019 04:30

Donde se encuentra el adn nuclear en un organismo eucariota?

Answers: 2

Answer

Biology, 22.06.2019 05:00

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

Answers: 2

Answer

Biology, 22.06.2019 20:00

Which of the following is not one of the mechanisms of enzyme catalysis by which the substrate is converted to the product? a. changing substrate orientation b. changing substrate reactivity c. inducing strain in the substrate d. preventing an induced fit d. preventing an induced fit

Answers: 1

Answer

Biology, 22.06.2019 20:50

Assume that you are interested in separating short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range. you have two recipes for making your polyacrylamide gels: one recipe uses 1.5 percent agarose and would be considered a “hard gel,” while the other uses 0.5 percent agarose and would be considered a loose gel. which gel should you use to separate the short (200-400 bp) dna molecules from a pool of longer molecules in the 10,000-20,000 nucleotide range?

Answers: 3

Answer

You know the right answer?

Dna can make exact copies of itself through replication because the nitrogen bases always pair...

Questions