DNA Structure
Flashcard
•
Biology
•
9th - 12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the structure of DNA?
Back
DNA is a double helix formed by two strands of nucleotides twisted around each other.
2.
FLASHCARD QUESTION
Front
What are the four nitrogenous bases in DNA?
Back
Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).
3.
FLASHCARD QUESTION
Front
What is the role of guanine in DNA?
Back
Guanine is one of the four nitrogenous bases that pair with cytosine in the DNA structure.
4.
FLASHCARD QUESTION
Front
What is the significance of the 5' end of a DNA strand?
Back
The 5' end refers to the end of the DNA strand that has a phosphate group attached to the fifth carbon of the sugar.
5.
FLASHCARD QUESTION
Front
What are purines?
Back
Purines are a type of nitrogenous base that includes adenine (A) and guanine (G). They have a double-ring structure.
6.
FLASHCARD QUESTION
Front
What are pyrimidines?
Back
Pyrimidines are a type of nitrogenous base that includes cytosine (C) and thymine (T). They have a single-ring structure.
7.
FLASHCARD QUESTION
Front
How do adenine and thymine pair in DNA?
Back
Adenine pairs with thymine through two hydrogen bonds.
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