0
What is the type of cell that doesn't have a membrane around their nuclear material?
Wiki User
∙ 9y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
When a high mass star collapes why doesnt it rekindle?
Because all the material that could rekindle it has run out - there is none left.
How long after your doctor scrapes your membrain do you go into labor?
they say it could happen in hours BUT doesnt happen for everyone, i was induced to labour 10days after having my membrane sweep!
A material that doesnt allow electrons to move through it easily is an?
insulator...as opposed to a conductor which does allow electrons to travel freely within it.
What is the path around the sun called?
The path around the sun is called an orbit. Yea that person's right. doesnt seem like it but it is
What regulates what goes in and out of the nucleus of the cell?
Embedded into the nuclear envelope are nuclear pore complexes (NPC) that transport materials in and out of the nucleus both ways. The material must has a signal to be either transported in and or out of the nucleus. NLS - to transport in NES - To transport out NRS- to retain inside the nucleus CRS- To stay inside in cytoplasm.First anything under about 40kD can move inside the nucleus and out with ease as they just diffuse down there concentration gradient. Larger molecules must have a signal meaning about 40kD. They either have 1 listed above or both NLS and NES, which means they are a shuttle protein which i will talk about later when I go into RAN.NLS - Nuclear localization signal for import into the nucleus. Its a permanent signal, and not cleaved bedore or after the translocation to the nucleus. Positive charges also play an important role in importing the SV40 gene (first to be experimentally tested) has a stretch of positive amino acid sequences which work as NLS. But if you change the sequence of this amino acid stretch you will weaken or block the function all together of the NLS. There can be monopartite signals like NLS (one stretch) or 2 which is called a Bipartite cluster (which needs a spacer between the 2 signals)So lets start.The NLS receptor and the NLS-containing cargo bind with importin A and inportin B. No energy requiredThey dock (this can be performed at low temp 4* and doesnt require energy)NLS receptor and complex translocate across the NPCThen GTP-Ran binds the B-subunit and it falls off. What is left is the a-subunit and the protein and the NLSThe receptor a and the protein complex break apart and the a-subunit with binds to RAN-GTP and is carried back to the cytoplasmic side.This is how we get directionality with RAN. GDP cytoplasm GTP in the nuclease because its a GTPase.There are several accessory proteins working as well. RCC1 which is a GEF - nucleotide exchange factor. It transfers GDP to GTP. It is located in the nucleus- think about this it makes sense - GTP in the nucleus is what the cell needs.The GTP to GDP are called RanGAP and RanBP1/2The nuclear export have hydrophobic amino acids like the (HIV rev protein) and this acts to export but RAN is still required.Once they transporter is back into the cytoplasm it gets ran GTP to ran GDP by RanGAP or RanBP1/2How is this whole mechanism regulated?Well chaperones work to mask the NLS. So regulation can be controlled that way.Nuclear transportDLW Bachelor of Science,Anatomy and Cell Biology 2012 McGill University
Does prokaryotic cells have a nuclear membrane?
Prokaryotic cell doesnt have a nuclear membrane.
What is is the main difference between prokaryotes and eukaryotes?
Prokaryotes doesnt have a membrane its organelles pretty much just float around unlike eukaryotes it contains a membrane where the organelles are kept proteinsynthesis in prokaryotes- it doesnt not contain "noncoding" meaning it doesnt have introns
Which substances did not diffuse the membrane?
starch doesnt diffuse through the dialysis membrane.
Which substance did not diffused through the membrane?
starch doesnt diffuse through the dialysis membrane.
How does nuclear energy help the environment?
It doesnt
What substance in the dialysis tubing or jar did not diffuse across the dialysis bag membrane and why?
molecular weight higher than the pore size of the tubing or dialysis bag material doesnt go.
How nuclear technology saves polloution?
Well really it doesnt.... nuclear is a main factor in pollution
Is protozoa a eukaryote?
Yes, they have a membrane bound nucleus and membrane bound organelles.
A cell that doesnt have a membrane-covered organelle?
A person that says hello
Does azerbaijan have any nuclear weapon programs?
impossible, too small of a country, hosting both western and russian military bases. azerbaijan doesnt even have a nuclear reactor, although there were talks of buying one recently. armenia on the other hand has an aging nuclear power plant, and in the past, the armenians have attempted to smuggle radioactive material into turkey and iran.
How many waste disposal companies in Australia?
Australia doesnt have nuclear waste
What exact photosensitive material is recorded for the data in holographic memory?
photosenstive material for holograohic memory doesnt exist...............
