Which type of bond holds the two strands of DNA together?
Answer and explanation
Correct answer: A. Hydrogen bonds between bases
- Step 1: Complementary bases pair by hydrogen bonds. Answer: Hydrogen bonds between bases. Why not the others: Covalent bonds join the sugar-phosphate backbone and peptide bonds join amino acids.
Practise more Cell Biology, Genetics and Physiology.
Free questions with an explanation for every one, and full timed MCAT (Medical College Admission Test) mock tests.
More Cell Biology, Genetics and Physiology questions
- Which organelle contains hydrolytic enzymes for intracellular digestion?
- Which organelle is mainly responsible for modifying, sorting and packaging proteins for secretion?
- During which phase of mitosis do the sister chromatids separate and move to opposite poles?
- In which phase of meiosis does crossing over between homologous chromosomes occur?
- In a population in Hardy-Weinberg equilibrium, 4% of people have a recessive condition. What is the frequency of carriers?
- A woman who is a carrier of an X-linked recessive disease has children with an unaffected man. What proportion of their sons are expected to…