Questions and Answers
The correct structure of DNA components can be presented as:
Which of the following is a characteristic of double-stranded DNA?
Which of the following DNA molecules is the most stable?
Doubled-stranded DNA consists of two antiparallel strands, meaning that one strand is oriented in the 5' to 3' direction, while the other is oriented in the 3' to 5' direction.
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Asymmetrical spacing of the backbones of the DNA double helix generates major and minor grooves.
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Study Notes
DNA Structure Fundamentals
- DNA components are organized in the order: phosphate-sugar-base, making option B the correct structure format.
- Double-stranded DNA exhibits several characteristics, including a width of 2 nanometers, 10 base pairs per turn, and a distance of 0.34 nanometers per base pair; all are included in option E.
Stability of DNA Molecules
- The most stable DNA molecule listed is GCGTGCAC paired with CGCACGTG, making option D the correct choice.
Antiparallel Orientation
- Double-stranded DNA features two antiparallel strands; one strand runs from 5' to 3', while the complementary strand runs from 3' to 5'. This statement is true.
Grooves in the Double Helix
- The asymmetrical spacing of the sugar-phosphate backbones in the DNA double helix creates major and minor grooves. This statement is also true.
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Description
Test your knowledge on the structure of DNA with these flashcards. Each card presents a question about DNA components and characteristics, allowing you to reinforce your understanding in a quick and efficient manner. Perfect for students studying genetics or molecular biology.
