MCQ Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life Advertisement 1. Life is widely believed to have originated in Air Soil Water RocksQuestion 1 of 202. Organisms living in hot springs are mainly Multicellular algae Thermophiles Viruses FungiQuestion 2 of 203. Cells are defined as Chemical units Basic units of life Structural proteins TissuesQuestion 3 of 204. Organisms made up of one cell are called Multicellular Unicellular Colonial Tissue-levelQuestion 4 of 205. The limit of resolution of the human eye is 1 mm 0.1 mm 10 mm 0.01 mmQuestion 5 of 206. A device used to observe cells is Telescope Microscope Thermometer BarometerQuestion 6 of 207. Robert Hooke observed cells in Blood Cork Leaf WaterQuestion 7 of 208. The magnification of a microscope depends on Light intensity Eyepiece and objective lens Mirror only Stage sizeQuestion 8 of 209. Osmosis is the movement of Solute Gas Water ProteinQuestion 9 of 2010. Diffusion is movement from Low to high concentration High to low concentration Equal concentration No movementQuestion 10 of 2011. The cell membrane is Fully permeable Impermeable Selectively permeable RigidQuestion 11 of 2012. Cell membrane thickness is about 1 nm 7–10 nm 100 nm 1 µmQuestion 12 of 2013. The fluid mosaic model explains Cell wall Cytoplasm Cell membrane NucleusQuestion 13 of 2014. Plant cells have an extra layer called Cytoplasm Cell wall Nucleus VacuoleQuestion 14 of 2015. Cell wall is mainly made of Protein Lipid Cellulose DNAQuestion 15 of 2016. Animal cells lack Nucleus Cytoplasm Cell wall MembraneQuestion 16 of 2017. The jelly-like substance in a cell is Nucleus Cytoplasm Membrane Cell wallQuestion 17 of 2018. Prokaryotic cells lack DNA Cytoplasm Membrane-bound organelles RibosomesQuestion 18 of 2019. Eukaryotic cells have No nucleus Primitive nucleus Well-defined nucleus No DNAQuestion 19 of 2020. The nucleus contains Lipids Chromosomes Ribosomes EnzymesQuestion 20 of 20 Loading...
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