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DNA helicase

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15y ago

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Some organisms use single-stranded rather than double-stranded DNA In these organisms which enzyme would probably not be needed for DNA replication?

DNA helicase


What would be the immediate consequences of a non-functional primase enzyme?

A non-functional primase enzyme would prevent the initiation of DNA replication since primase is responsible for synthesizing RNA primers that are needed to start the replication process. Without these RNA primers, DNA polymerase cannot add new nucleotides to the growing DNA strand, leading to stalled replication and cell death.


Why would a new cell need an entire copy of the old cell's DNA?

So it can carry out the sum total of all cellular functions. Genes code for proteins and you would not want to be short of a needed enzyme, for instance. Besides, the actuallity of replication IS replication of the genetic material. That is what genes do.


Some organisms use singlestranded rather than doublestranded DNA In these organisms which enzyme would probably not be needed for DNA replication?

Some viruses have single stranded DNA molecules. These viruses do not have the machinery to synthesise the DNA on their own. They insert their DNA in a living cell where the DNA synthesis takes place.


What enzyme is responsible for unwinding the DNA molecule for replication?

The enzyme responsible for unwinding the DNA molecule for replication is called helicase. Helicase breaks the hydrogen bonds between the DNA base pairs, allowing the two strands to separate and expose the nucleotide bases for replication.


Why is helicase good?

Helicase is good because it plays a crucial role in DNA replication by unwinding the double-stranded DNA helix, allowing other enzymes to access the DNA strands for replication. Without helicase, DNA replication would not be possible, making it an essential enzyme for the process.


What enzyme breaks hydrogen bonds between nitrogen bases?

Helicase and RNA polymerase separate DNA strands by breaking the hydrogen bonds between complementary bases.Helicase parts the strands of DNA during DNA replication, and RNA polymerase parts them during transcription.The enzyme that separates DNA in called DNA helicases. There are two of them that work away from the origin of replication, creating in "bubble" in the DNA molecule. For eukaryotes, there would be several origins of replication but in prokaryotes, there is only one origin of replication.


What enzyme assembles the complimentary nucleotide bases during replication?

THat would be the enzyme DNA Polymerase III which attaches free floating nucleotides to the parent strand. But remember, they can only be attached to a free 3' position!


What would happen to cellular respiration process if the enzyme for one step of the process were missing or defective?

If an enzyme in a sequence of enzyme-controlled reactions is missing or defective then the process will stop at that point. So respiration could proceed until it reached the reaction which needed the missing or defective enzyme at which point it would stop.


What would happen to cellular respiration process if the enzyme for one step of the process for missing or defective?

If an enzyme in a sequence of enzyme-controlled reactions is missing or defective then the process will stop at that point. So respiration could proceed until it reached the reaction which needed the missing or defective enzyme at which point it would stop.


What enzyme is needed for the conversion of testosterone into estradiol?

CYP1A2 and CYP3A4 but I would like more indepth info too


What is the negative control in the lactose experiment?

The negative control in the lactose experiment would be a sample that does not contain lactose or the enzyme needed to break down lactose. This control is used to show what would happen if no lactose were present for the enzyme to act on.