Question

1. in all plant and animal cells, the nucleus contains long molecules of dna. which of the following best describes the function of dna? a dna provides the shape and structure of the nucleus. b dna packages materials for transport through the nucleus. c dna carries materials into and out of the nucleus. d dna contains the blueprint for producing the whole organism. 19. which cellular function does this model represent? a respiration b protein synthesis c dna replication d photosynthesis 20. ultraviolet radiation can cause mutations in the dna of skin cells that have been overexposed to the sun. this mutated dna has no effect on future offspring because — a changes in skin cell dna are homozygous recessive b mutations must occur within the rna codons c offspring reject parental skin cells d only changes to gamete dna can be inherited

Explanation:

1. DNA holds genetic information for organism - wide production.
2. The model shows tRNA, mRNA, and ribosome interaction for protein synthesis.
3. Gametes carry genetic material for inheritance; somatic (skin) cell DNA changes are not passed on.

Answer:

1. D. DNA contains the blueprint for producing the whole organism.
2. B. Protein synthesis
3. D. only changes to gamete DNA can be inherited