Explore how the nuclear envelope separates transcription from translation and how processed mRNA moves between nucleus and cytoplasm in IB Biology SL B2.2.2.
In eukaryotes, the chromosomes are located in the nucleus, and the nucleus can divide by mitosis or meiosis.
Describe the processes that occur in the nucleus of a cell during interphase.
a. DNA is replicated;
b. unwinding of the double helix/DNA (by helicase)
OR
supercoiled DNA is relaxed (by gyrase);
c. hydrogen bonds broken
OR
strands separate;
d. synthesis of new strands of DNA (by DNA polymerase);
e. DNA replication occurs semi-conservatively
OR
existing strand used as a template (for a new strand of DNA);
OR
DNA replication is continuous on the leading strand, but discontinuous on the lagging strand;
f. copying base sequences occurs through complementary base pairing (in both transcription and replication);
g. DNA is transcribed;
h. synthesis of RNA/mRNA (by RNA polymerase);
i. copy of a gene produced/only one gene transcribed;
j. introns are removed;
k. RNA/mRNA exported/moves to the cytoplasm;
describe
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