Biology, 29.01.2020 04:40 aletadaboss

Why does a cell need to make a copy of its dna? (explain about replication and mrna transcription)

Answers: 2

Show answers

Answers

Answer from: RG1971

A cell needs to make a copy of its DNA for cell division.

Explanation:

A DNA replication is the process by which a single DNA produces another double stranded DNA by means of different enzymes.

In case of DNA, the structure is double stranded, which needs to open up before replication for the enzymes to work. Thus the enzyme helicase removes the DNA helix and the enzyme gyrase releases the helix. Then, enzymes like DNA dependent DNA polymerase comes into site with three different subtypes of the enzyme which does several jobs. It replicates from the 5'-3' direction. It brings different nucleotide triphosphates from the cytoplasm and breaks the triphosphate bond which releases energy. This energy is used by the enzyme to join the nucleotide with the previously formed chain. The enzyme DNA Ligase thereby joins the DNA strand with the previous batch and the final new double stranded DNA is produced. This is DNA replication which helps in cell division, because without the presence of second set of DNA, the cell division isn't possible.

Answer from: elizabethprasad2

DNA replication:

Cells duplicate their DNA when they decide they need to divide. DNA is the manual for building and operating a cell. DNA replication needs to occur because existing cells divide to produce new cells.

mRNA transcription:

The information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). This process is known as mRNA transcription.

Answer from: Quest

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.

Answer from: Quest

1. protection 2. homeostasis 3. storage4.blood formation5.bone marrow 6.movement

Other questions on the subject: Biology

Biology, 21.06.2019 15:00, brooklynneramos9956

According to the theory of punctuated equilibrium, at what rate does speciation occur? species change depending on the rate of natural selection. after periods of stasis, new species evolve relatively rapidly. species change slowly and eventually form new species. some species change quickly and others change slowly to balance the overall rate.

Answers: 3

continue

Biology, 21.06.2019 23:20, jholland03

During an investigation of an xss attack, the investigator comes across the term "[a-za-z0-9\%]+" in analyzed evidence details. what is the expression used for?

Answers: 2

continue

Biology, 22.06.2019 02:30, hey840

Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.

Answers: 1

continue

Biology, 22.06.2019 06:30, brandon436

In 2015, about ten percent of total u. s. energy consumption was from renewable energy sources. renewable energy plays an important role in reducing greenhouse gas emissions. when renewable energy sources are used, the demand for fossil fuels is reduced. sanjay and his family want to cut back on their use of non-renewable resources at home. they are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment. which renewable resource would not fit into their plan? a) solar power b) burning wood c) constructing a wind turbine eliminate d) generating hydroelectric power

Answers: 1

continue

You know the right answer?

Why does a cell need to make a copy of its dna? (explain about replication and mrna transcription)...