Xeroderma pigmentosum is a severe, genetically linked skin cancer in which dna repair mechanisms are impaired. why would sufferers of this condition need to stay out of the sun?

Why do you think the puppy litter was all dark-haired?

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

What enzyme is most important for dna replication and why?