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Questions and Answers
What is the basic unit that can replicate independently?
What is the basic unit that can replicate independently?
- Chromosome
- Nucleus
- Organelle
- Cell (correct)
Which organisms are made up of various types of cells?
Which organisms are made up of various types of cells?
- Fungi
- Plants
- Animals (correct)
- Bacteria
What do plant cells have for photosynthesis?
What do plant cells have for photosynthesis?
- Cell wall
- Mitochondria
- Ribosomes
- Chloroplasts (correct)
Which type of cells have a single circular chromosome/nucleoid containing all genes?
Which type of cells have a single circular chromosome/nucleoid containing all genes?
What is an example of diffusion mentioned in the text?
What is an example of diffusion mentioned in the text?
What acts as a barrier for substances to move in and out of a cell?
What acts as a barrier for substances to move in and out of a cell?
In what condition is the carbon dioxide concentration lower in a photosynthesising leaf cell than in its environment?
In what condition is the carbon dioxide concentration lower in a photosynthesising leaf cell than in its environment?
When is the carbon dioxide concentration higher inside a leaf cell compared to the environment?
When is the carbon dioxide concentration higher inside a leaf cell compared to the environment?
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Study Notes
- Cells are the basic building blocks of life, the smallest unit that can replicate independently.
- Animals and plants are multicellular organisms made up of various types of cells, while bacteria are unicellular organisms.
- Both animal and plant cells have a cell membrane that controls substance entry and exit, a nucleus with DNA, and cytoplasm filled with organelles.
- Animal and plant cells have mitochondria for energy production and ribosomes for protein synthesis.
- Plant cells have a cell wall made of cellulose for support, a permanent vacuole for storing nutrients, and chloroplasts for photosynthesis.
- Bacterial cells have a single circular chromosome/nucleoid containing all genes, no mitochondria or chloroplasts, and some may have flagella for movement and plasmids for extra genes.
- Plant and animal cells are eukaryotic, while bacterial cells are prokaryotic.
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