AP S1 Exam Review 1
Flashcard
•
Biology
•
11th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the role of glutamine synthetase in glutamine synthesis?
Back
Glutamine synthetase catalyzes the formation of glutamine from glutamate and ammonia, coupling an exothermic reaction to drive an endothermic reaction.
2.
FLASHCARD QUESTION
Front
Why is water considered a polar molecule?
Back
Water is polar because oxygen is more electronegative than hydrogen, leading to a partial negative charge on the oxygen and partial positive charges on the hydrogens.
3.
FLASHCARD QUESTION
Front
What does Chargaff's rule state about DNA base pairing?
Back
Chargaff's rule states that in DNA, the amount of adenine (A) is approximately equal to thymine (T), and the amount of guanine (G) is approximately equal to cytosine (C).
4.
FLASHCARD QUESTION
Front
What happens to the space between water molecules as liquid water freezes?
Back
As liquid water becomes ice, the space between water molecules increases due to the formation of a crystalline structure.
5.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
Facilitated diffusion is the process of moving particles across a cell membrane through channel proteins, following their concentration gradient without the use of ATP.
6.
FLASHCARD QUESTION
Front
Define endothermic reaction.
Back
An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.
7.
FLASHCARD QUESTION
Front
Define exothermic reaction.
Back
An exothermic reaction is a chemical reaction that releases energy to its surroundings, usually in the form of heat.
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