Table of Contents
- 1 Can RNA pass through nuclear pores?
- 2 Which molecule leaves the nucleus through the pores in the nuclear envelope?
- 3 Where are nuclear pore proteins synthesized?
- 4 What passes through the nuclear pores quizlet?
- 5 How is eukaryotic RNA processed before leaving the nucleus?
- 6 Which of the following macromolecules leaves the nucleus of a eukaryotic cell through pores in the nuclear membrane group of answer choices?
- 7 What are nuclear pores made out of?
- 8 How does mRNA diffuse through the nuclear pores?
- 9 How are proteins transported between the nucleus and the cytosol?
- 10 Where are ribosomes bound in the nuclear lamina?
Can RNA pass through nuclear pores?
Nuclear pore complexes allow the transport of molecules across the nuclear envelope. This transport includes RNA and ribosomal proteins moving from nucleus to the cytoplasm and proteins (such as DNA polymerase and lamins), carbohydrates, signaling molecules and lipids moving into the nucleus.
Which molecule leaves the nucleus through the pores in the nuclear envelope?
mRNA
DNA Biology The mRNA leaves the nucleus through nuclear pores and travels to a ribosome. Here translation or conversion of RNA into an amino acid sequence occurs.
Which of the following leave the nucleus of a eukaryotic cell through pores in the nuclear membrane?
Messenger RNA
Messenger RNA, or mRNA, leaves the nucleus through pores in the nuclear membrane. These pores control the passage of molecules between the nucleus and the cytoplasm. Before the mRNA arrives in the cytoplasm, however, it must be processed. mRNA processing occurs only in eukaryotes.
Where are nuclear pore proteins synthesized?
cytoplasm
Since proteins are synthesized in the cytoplasm, the export of mRNAs, rRNAs, and tRNAs is a critical step in gene expression in eukaryotic cells.
What passes through the nuclear pores quizlet?
The nucleolus contains messenger RNA (mRNA), which crosses the nuclear envelope through the nuclear pores.
Which of the following can pass through nuclear pore?
Ribosomes, pre-mRNA, and proteins (such as transcription factors) are all perfectly capable of moving through the nuclear pore complexes, given the appropriate environment.
How is eukaryotic RNA processed before leaving the nucleus?
Before leaving the nucleus as mRNA, eukaryotic transcripts are modified or processed in several ways. Both exons and introns are transcribed from DNA into RNA. However before the RNA leaves the nucleus the introns are removed and the exons are joined to produce an mRNA molecule with a continuous coding sequence.
Which of the following macromolecules leaves the nucleus of a eukaryotic cell through pores in the nuclear membrane group of answer choices?
Cards
| Term Endocytosis moves materials _____ a cell via _____. | Definition into membranous vesicles |
|---|---|
| Term Which of the following macromolecules leaves the nucleus of a eukaryotic cell through pores in the nuclear membrane? | Definition mRNA |
Which type of RNA contains the code that will direct protein synthesis?
Messenger RNA (mRNA)
Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell’s ribosomes (the structures in which protein synthesis takes place); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein …
What are nuclear pores made out of?
Nuclear Pores. All transport between the nucleus and the cytoplasm occurs through large protein channels that are embedded in the nuclear membrane. These channels, which are called nuclear pore complexes (NPCs), are composed of proteins referred to as nucleoporins.
How does mRNA diffuse through the nuclear pores?
Once the pre-mRNA that has been cut of it’s introns and spliced back together, it becomes mRNA that diffuses through the nuclear pores to direct the assembly or synthesis of new protein molecules at the ribosomes in the cytoplasm. Anticodons are characteristic of _______________.
How are tRNAs and mRNAs transported to the cytosol?
At the same time, tRNAs and mRNAs are synthesized in the nuclear compartment and then exported to the cytosol. Like the import process, the export process is selective; mRNAs, for example, are exported only after they have been properly modified by RNA-processing reactions in the nucleus.
How are proteins transported between the nucleus and the cytosol?
The transport of nuclear proteins through nuclear pore complexes can be directly visualized by coating gold particles with a nuclear localization signal, injecting the particles into the cytosol, and then following their fate by electronmicroscopy (Figure 12-13).
Where are ribosomes bound in the nuclear lamina?
The ribosomes that are normally bound to the cytosolic surface of the ER membrane and outer nuclear membrane are not shown. The nuclear lamina is a fibrous meshwork underlying the inner membrane. NCBI Skip to main content Skip to navigation Resources How To About NCBI Accesskeys