Q: What distinctive dna shape forms when the two nucleotide chains wrap around the same axis? Choices: - single spiral - chain helix - double spiral - double helix A:
double helix

Q: What fatty material inside arteries can restrict blood flow in the artery? Choices: - marble - collagen - cholesterol - plaque A:
plaque

Q: Q: What property of ocean water increases rapidly as the water gets deeper? Choices: - visability - speed - salt content - pressure A:
A: pressure

Question: Q: Genetic traits are characteristics encoded in what? Choices: - nuclei - bacteria - rna - dna A:
Answer: dna

*Question*
Q: Glaciers have been melting since what period? Choices: - industrial age - bronze age - stone age - pleistocene ice age A:
**Answer**
pleistocene ice age

Q: Q: What kind of structure do purines have? Choices: - triple ring structure - single ring structure - helical stucture - double ring structure A:
A: double ring structure