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 Practice Cell : The Unit of Life 50 Flashcards |
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What are the two main types of cells based on their structural complexity? |
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Prokaryotic cells and eukaryotic cells |
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True or False: The cell theory states that all living organisms are composed of cells and can arise from non-cellular structures. |
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False. The cell theory states that all living organisms are composed of cells and that cells arise only from pre-existing cells. |
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Riddle: I am a protective layer that surrounds plant cells, composed mainly of cellulose, what am I? |
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Cell wall |
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Which structure is known as the powerhouse of the cell? |
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Mitochondria |
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Fill-in-the-blanks: The ______ is a network of membranes and organelles that work together to perform essential cellular functions. |
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Endomembrane system |
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What are ribosomes made of? |
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Ribonucleic acid (RNA) and proteins |
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True or False: Prokaryotic cells contain membrane-bound organelles. |
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False. Prokaryotic cells do not contain membrane-bound organelles. |
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MCQ: Which of the following components is found in the Golgi apparatus? A) Ribosomes B) Cisternae C) Mitochondria D) Chloroplasts |
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B) Cisternae |
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Fill-in-the-blanks: The ______ is a layer mainly of calcium pectate that holds adjacent plant cells together. |
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Middle lamella |
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What is the function of lysosomes? |
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To break down carbohydrates, proteins, lipids, and nucleic acids using hydrolytic enzymes. |
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True or False: Eukaryotic cells have ribosomes with a sedimentation coefficient of 70S. |
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False. Eukaryotic ribosomes have a sedimentation coefficient of 80S. |
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Riddle: I am a thin, flexible barrier that controls what enters and exits the cell, what am I? |
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Cell membrane (plasma membrane) |
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Which type of plastid is responsible for photosynthesis? |
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Chloroplasts |
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Fill-in-the-blanks: The primary component of plant cell walls is ______. |
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Cellulose |
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What are the two main components of the cytoskeleton? |
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Microtubules and microfilaments |
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MCQ: Which of the following structures is involved in protein synthesis? A) Lysosome B) Ribosome C) Vacuole D) Golgi apparatus |
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B) Ribosome |
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True or False: Chromosomes are composed of RNA and are found in the cytoplasm. |
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False. Chromosomes are composed of DNA and are found in the nucleus. |
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Riddle: I am a structure that forms from the combination of three parts in motile bacteria, what am I? |
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Flagellum |
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What is the role of the smooth endoplasmic reticulum? |
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Synthesis of lipids and steroid hormones |
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Fill-in-the-blanks: The ______ is a complex of membranes that packages proteins and lipids for transport. |
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Golgi apparatus |
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Which cellular structure is responsible for maintaining osmotic balance in some cells? |
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Contractile vacuole |
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True or False: Chromoplasts contain chlorophyll and are involved in photosynthesis. |
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False. Chromoplasts contain carotenoid pigments and are responsible for color, not photosynthesis. |
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MCQ: Which of the following is not a type of microbody? A) Peroxisome B) Lysosome C) Mitochondria D) Glyoxysome |
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C) Mitochondria |
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What is the primary role of the nuclear envelope? |
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To separate the contents of the nucleus from the cytoplasm and regulate transport. |
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Fill-in-the-blanks: The structure that connects the cytoplasm of adjacent plant cells is called ______. |
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Plasmodesmata |
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