Protein transport into the nucleus occurs . selective transport through individual subsets of nuclear pore complexes that are specific for individual classes of proteins. b. selective transport through the nuclear pores. c. diffusion through the nuclear envelope membranes. d. passive diffusion through the nuclear pores.

Which two criteria must be met before scientist can use radiocarbon dating? explain your answer

16. which of the following accurately describes a step within transcription? a. dna polymerase uses one strand of rna as a template to put together nucleotides. b. the dna strand is used as a template for which a complementary rna strand can be produced. c. the rna strand forms a template by which dna can be built. d. the rna strand is produced within the cytoplasm.

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?