What are purines?
Biology Concepts and Terminology

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Biology
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University
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Hard
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1.
FLASHCARD QUESTION
Front
Back
Purines are nitrogenous bases with a double-ring structure, including Adenine (A) and Guanine (G).
2.
FLASHCARD QUESTION
Front
What is the basic unit of life?
Back
All living things are made up of cells.
3.
FLASHCARD QUESTION
Front
What do living things use energy for?
Back
Living things use energy to do work, maintain themselves, grow, and reproduce.
4.
FLASHCARD QUESTION
Front
What does pH measure?
Back
pH is a measure of acidity or basicity.
5.
FLASHCARD QUESTION
Front
What elements are found in living tissue?
Back
Elements found in living tissue are often the same as those found in nonliving matter.
6.
FLASHCARD QUESTION
Front
Define homeostasis.
Back
Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes.
7.
FLASHCARD QUESTION
Front
What is the role of enzymes in biological reactions?
Back
Enzymes are catalysts that speed up chemical reactions in living organisms by lowering the activation energy.
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