Why is water considered polar?
AP Biology: Unit 1 Review

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Biology
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9th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
Water is considered polar due to the presence of polar covalent bonds, where oxygen is more electronegative than hydrogen, leading to a partial negative charge on oxygen and a partial positive charge on hydrogen.
2.
FLASHCARD QUESTION
Front
What is a key difference between DNA and RNA regarding their sugar component?
Back
DNA contains deoxyribose sugar, while RNA contains ribose sugar.
3.
FLASHCARD QUESTION
Front
What is the role of the carboxyl group in peptide bonds?
Back
In a peptide bond, the carboxyl group of one amino acid bonds to the amino group of another amino acid.
4.
FLASHCARD QUESTION
Front
In which direction does DNA/RNA synthesis occur?
Back
DNA/RNA synthesis occurs in the 5' to 3' direction, meaning new nucleotides are added to the 3' hydroxyl end.
5.
FLASHCARD QUESTION
Front
What is cohesion in the context of water molecules?
Back
Cohesion refers to the attraction between water molecules due to hydrogen bonding, which allows water to form droplets.
6.
FLASHCARD QUESTION
Front
What is adhesion in the context of water molecules?
Back
Adhesion is the attraction between water molecules and other substances, which helps water to climb up plant roots and stems.
7.
FLASHCARD QUESTION
Front
What is surface tension in water?
Back
Surface tension is the cohesive force at the surface of water that makes it behave like a stretched elastic membrane.
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