BIOD 101 MODULE 4 FINAL PAPER 2026 EXAM Q&A STUDY GUIDE COMPLETE SOLUTION

BIOD 101 MODULE 4 FINAL PAPER 2026
EXAM Q&A STUDY GUIDE COMPLETE
SOLUTION


◉Contain 2 carbon-nitrogen rings, and 4 nitrogen atoms. Answer:
Purines - A and G


◉Contain 1 carbon-nitrogen ring, and 2 nitrogen atoms. Answer:
Pyramidines - T and C


◉Deoxyribose. Answer: sugar chemically linked to each base in DNA


◉Nucleoside. Answer: base + deoxyribose


◉Nucleotide. Answer: base + deoxyribose + phosphate group


◉complementary pairs. Answer: purine always pairs with
pyramidine
(T+A), (C+G)

, ◉Occur when 2 negatively charged atoms share a hydrogen atom.
Answer: Hydrogen bonds


◉# of hydrogen bonds between A and T. Answer: two


◉# of hydrogen bonds between C and G. Answer: three


◉sequence. Answer: specified linear arrangement of nucleotides
linked to the polynucleotide chains of DNA. Defines the entire
organism


◉end terminating with a phosphate group. Answer: 5' (five prime)
end


◉end terminating with a hydroxyl group. Answer: 3' (three prime)
end


◉antiparallel arrangement. Answer: one side of the helix runs in the
opposite (5'-3') direction of the other (3'-5)


◉Genome. Answer: entire sequence of paired bases in DNA


◉histone proteins. Answer: A simple protein bound to DNA,
involved in the coiling of chromosomes