Nuclear pores function as gateways for molecules to enter and exit a nucleus. Protein synthesis offers an example of why this movement is important. Explain
What will be an ideal response?
Protein synthesis occurs in cytoplasm, and it requires the participation of many molecules of RNA. RNA is produced in the nucleus. Thus, RNA molecules must move from nucleus to cytoplasm, and they do so through nuclear pores. Proteins that carry out RNA synthesis must move in the opposite direction, because this process occurs in the nucleus. A cell can regulate the amounts and types of proteins it makes at a given time by selectively restricting the passage of certain molecules through nuclear pores.
You might also like to view...
Whe considering receptors for hormone molecules, we can say that, in general, _________.
Fill in the blank(s) with the appropriate word(s).
You start to fall but then catch yourself, regaining your balance. Which of the following brain regions is responsible for the rapid coordination of muscle activity that kept you from falling?
A) motor cortex B) thalamus C) cerebellum D) pons
In a two-point test-cross analysis, a dihybrid F1 fly is crossed to a __________
A) pure-breeding mate with a dominant phenotype (AABB) B) pure-breeding mate with a recessive phenotype (aabb) C) heterozygote mate (AaBb) D) mate that is dominant for one gene and recessive for the other (AAbb or aaBB) E) second dihybrid F1 fly (sibling cross)
A population descending from a single organism or pure culture isolate is called a ________.
A. subspecies B. strain C. species D. genus