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

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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 are the three components of a nucleic acid monomer?
Back
The three components of a nucleic acid monomer are a pentose sugar, a nitrogenous base, and a phosphate group.
3.
FLASHCARD QUESTION
Front
Which macromolecules contain nitrogen?
Back
Nucleic acids and proteins are the macromolecules that contain nitrogen.
4.
FLASHCARD QUESTION
Front
What is the base pairing rule in DNA?
Back
In DNA, adenine (A) pairs with thymine (T) with 2 hydrogen bonds, and guanine (G) pairs with cytosine (C) with 3 hydrogen bonds.
5.
FLASHCARD QUESTION
Front
What is the role of the carboxyl group in peptide bond formation?
Back
The carboxyl group of one amino acid reacts with the amino group of another amino acid to form a peptide bond.
6.
FLASHCARD QUESTION
Front
Define polar covalent bond.
Back
A polar covalent bond is a type of chemical bond where a pair of electrons is unequally shared between two atoms, resulting in a molecule with a slight electrical dipole moment.
7.
FLASHCARD QUESTION
Front
What is a nucleotide?
Back
A nucleotide is the basic building block of nucleic acids, consisting of a pentose sugar, a phosphate group, and a nitrogenous base.
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