
Semester 1 Review '24
Flashcard
•
Biology
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a phosphate in the context of DNA?
Back
A phosphate is a component of the DNA backbone, linking the sugar molecules together and forming the structural framework of the DNA molecule.
2.
FLASHCARD QUESTION
Front
How many chromosomes do daughter cells have after meiosis if the parent cell has 40 chromosomes?
Back
Each daughter cell will have 20 chromosomes after meiosis, as meiosis reduces the chromosome number by half.
3.
FLASHCARD QUESTION
Front
What is the complementary DNA strand for the sequence CGATCCATGA?
Back
The complementary DNA strand is GCTAGGTACT.
4.
FLASHCARD QUESTION
Front
What is the result of crossing over during meiosis?
Back
Crossing over results in genetic diversity by exchanging genetic material between homologous chromosomes.
5.
FLASHCARD QUESTION
Front
What enzyme breaks down chitin?
Back
Chitinase is the enzyme that breaks down chitin, allowing predators to digest insects.
6.
FLASHCARD QUESTION
Front
Define a nucleotide.
Back
A nucleotide is the basic building block of DNA and RNA, consisting of a phosphate group, a sugar, and a nitrogen base.
7.
FLASHCARD QUESTION
Front
What is the role of nitrogen bases in DNA?
Back
Nitrogen bases (adenine, thymine, cytosine, guanine) pair with each other to form the rungs of the DNA ladder, encoding genetic information.
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