Can you please help ASAP

6. in the dna double helix, how are the two strands of dna held together? a. chemical bonds between base pairs hold the two strands of dna together. b. hydrogen bonds between the base pairs hold the two strands of dna together. c. hydrogen bonds between sugar groups and phosphate groups hold the two strands of dna together. d. chemical bonds between sugar groups and phosphate groups hold the two strands of dna together.

Draw the structure of dna nucleotide with adenine as nitrogenous base

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist