Which type of cell appeared first on earth?
Bio Semester 1 Exam 2024

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Biology
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Prokaryotic cells are the first type of cells that appeared on Earth, characterized by their lack of a nucleus and membrane-bound organelles.
2.
FLASHCARD QUESTION
Front
What does DNA stand for?
Back
DNA stands for Deoxyribonucleic acid, which is the molecule that carries genetic information in living organisms.
3.
FLASHCARD QUESTION
Front
True or False: Polymers are molecules made from repeating units of identical organic compounds that are linked together with hydrogen bonds.
Back
False. Polymers are made from repeating units called monomers, which are linked together by covalent bonds, not hydrogen bonds.
4.
FLASHCARD QUESTION
Front
True or False: Without enzymes, chemical reactions necessary for life would not occur at a rate sufficient to sustain life.
Back
True. Enzymes are biological catalysts that speed up chemical reactions, making them essential for sustaining life.
5.
FLASHCARD QUESTION
Front
What chemical bond in ATP releases energy when broken?
Back
The phosphate bond in ATP releases energy when broken, which is crucial for powering cellular processes.
6.
FLASHCARD QUESTION
Front
Define prokaryotic cells.
Back
Prokaryotic cells are simple, unicellular organisms that lack a nucleus and membrane-bound organelles, such as bacteria.
7.
FLASHCARD QUESTION
Front
What is the function of enzymes in biological reactions?
Back
Enzymes act as catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur.
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