What is the role of hydrogen bonds in DNA structure?
STAAR Biology Reporting Category 2

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Biology
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Hydrogen bonds hold the two strands of DNA together by connecting complementary nitrogenous bases (adenine with thymine, and cytosine with guanine).
2.
FLASHCARD QUESTION
Front
Define a dominant allele.
Back
A dominant allele is an allele whose trait always shows up in the organism when the allele is present.
3.
FLASHCARD QUESTION
Front
How do environmental factors influence genetic traits in organisms?
Back
Environmental factors can regulate the expression of genes, leading to changes in traits, such as coat color in snowshoe hares, which is influenced by seasonal changes.
4.
FLASHCARD QUESTION
Front
What does it mean for an organism to be heterozygous?
Back
An organism is heterozygous when it has two different alleles for a particular gene, one dominant and one recessive.
5.
FLASHCARD QUESTION
Front
What is a mutation in the context of DNA?
Back
A mutation is a change in the DNA sequence that can affect how genes function, which may involve insertions, deletions, or substitutions of nucleotides.
6.
FLASHCARD QUESTION
Front
What is the significance of the double helix structure of DNA?
Back
The double helix structure of DNA allows for the efficient storage of genetic information and the ability to replicate accurately during cell division.
7.
FLASHCARD QUESTION
Front
Explain the concept of gene regulation.
Back
Gene regulation refers to the mechanisms that control the expression of genes, determining when and how much of a gene product is made.
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