{"columns":[{"name":"csvbase_row_id","type":"int64"},{"name":"What is the most abundant lipid in cell membranes?","type":"string"},{"name":"Phospholipids","type":"string"},{"name":"Triglycerides","type":"string"},{"name":"Steroids","type":"string"},{"name":"Waxes","type":"string"},{"name":"A","type":"string"}],"n_rows":69,"rows_kept":69,"cut":false,"text_format":"parquet-jsonl-2026-10-02","bounds":{"document_bytes":16777216,"package_text_limit_bytes":33554432,"package_text_slack_bytes":1024,"rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096,"vector_min":64,"vector_head_fixed":16,"vector_head_variable":64,"kv_value_chars":1048576,"nesting_max":64,"binary_text":true},"cells_cut":0,"cells_bad_utf8":0,"cells_raw":0,"cells_binary":0,"cells_binary_text":0,"cells_vector":0,"n_row_groups":1,"reader":"pyarrow 23.0.1, python 3.13","created_by":"parquet-cpp-arrow version 17.0.0","schema":{"fields":[{"name":"csvbase_row_id","type":"int64","nullable":true,"metadata":null,"children":null},{"name":"What is the most abundant lipid in cell membranes?","type":"string","nullable":true,"metadata":null,"children":null},{"name":"Phospholipids","type":"string","nullable":true,"metadata":null,"children":null},{"name":"Triglycerides","type":"string","nullable":true,"metadata":null,"children":null},{"name":"Steroids","type":"string","nullable":true,"metadata":null,"children":null},{"name":"Waxes","type":"string","nullable":true,"metadata":null,"children":null},{"name":"A","type":"string","nullable":true,"metadata":null,"children":null}],"parquet":"required group field_id=-1 schema {\n  optional int64 field_id=-1 csvbase_row_id;\n  optional binary field_id=-1 What is the most abundant lipid in cell membranes? (String);\n  optional binary field_id=-1 Phospholipids (String);\n  optional binary field_id=-1 Triglycerides (String);\n  optional binary field_id=-1 Steroids (String);\n  optional binary field_id=-1 Waxes (String);\n  optional binary field_id=-1 A (String);\n}\n"},"kv_metadata":[["ARROW:schema",{"$cut":{"chars":632,"head":""}}]]}
[1,"A molecule with hydrophilic and hydrophobic parts is called?","Amphipathic","Polar","Nonpolar","Ionic","A"]
[2,"Which part of a phospholipid is hydrophobic?","Fatty acid tails","Phosphate head","Glycerol","Sugar","A"]
[3,"Which part of a phospholipid is hydrophilic?","Phosphate head","Fatty acid tails","Steroid ring","Hydrocarbon chain","A"]
[4,"Why do phospholipids form bilayers in water?","Hydrophobic interactions","Covalent bonds","Ionic bonds","Peptide bonds","A"]
[5,"Membranes are mainly held together by?","Hydrophobic interactions","Covalent bonds","Ionic bonds","Hydrogen bonds","A"]
[6,"Why is phospholipid flip-flop rare?","Hydrophilic head crosses hydrophobic core","Needs ATP","Too small","Proteins block it","A"]
[7,"Which moves faster in membranes?","Lipids","Proteins","Carbohydrates","Nucleic acids","A"]
[8,"Proteins move slower than lipids because they are?","Larger","Charged","Hydrophobic","Polar","A"]
[9,"Unsaturated fatty acids have?","Kinked tails","Straight tails","No double bonds","Short chains","A"]
[10,"What increases membrane fluidity?","Unsaturated fats","Saturated fats","Low temperature","High protein","A"]
[11,"Why do unsaturated fats increase fluidity?","Cannot pack tightly","Longer tails","More cholesterol","More proteins","A"]
[12,"At low temperatures membranes become?","Solid","More fluid","More permeable","Active","A"]
[13,"Cholesterol at high temperatures?","Restricts phospholipid movement","Increases fluidity","Removes proteins","Destroys membrane","A"]
[14,"Plant membranes mainly contain?","Steroids","Cholesterol","Waxes","Triglycerides","A"]
[15,"Membrane fluidity affects?","Protein movement","DNA replication","Cell division","Ribosomes","A"]
[16,"Too much membrane fluidity causes?","Loss of protein function","Better transport","More ATP","Cell growth","A"]
[17,"Fish in cold water have membranes rich in?","Unsaturated fats","Saturated fats","Proteins","Cholesterol","A"]
[18,"Bacteria in hot springs have?","Unusual lipids","No membranes","Thin membranes","More sugars","A"]
[19,"Main function of transport proteins?","Move substances","Make ATP","Store energy","DNA synthesis","A"]
[20,"Which is NOT a membrane protein function?","Protein synthesis","Transport","Signal transduction","Cell recognition","A"]
[21,"Signal transduction means?","Message sent into cell","Energy storage","Cell division","Diffusion","A"]
[22,"Cell-cell recognition uses?","Carbohydrates","Lipids","DNA","ATP","A"]
[23,"Intercellular joining helps cells?","Stick together","Move faster","Divide","Respire","A"]
[24,"Attachment to cytoskeleton helps?","Maintain cell shape","Protein folding","ATP synthesis","DNA replication","A"]
[25,"Glycoproteins are?","Protein plus carbohydrate","Protein plus lipid","Lipid plus sugar","DNA plus protein","A"]
[26,"Glycolipids are?","Lipid plus carbohydrate","Protein only","Carbohydrate only","DNA","A"]
[27,"Glyco means?","Carbohydrate","Protein","Fat","Energy","A"]
[28,"Membrane carbohydrates act as?","Cell identity markers","Enzymes","Pumps","Channels","A"]
[29,"Selective permeability means?","Some substances pass easily","Everything passes","Nothing passes","Only water passes","A"]
[30,"Nonpolar molecules cross membranes easily because they are?","Hydrophobic","Charged","Large","Polar","A"]
[31,"Which crosses membrane most easily?","Oxygen","Glucose","Ions","Proteins","A"]
[32,"Polar molecules cross membranes?","Slowly","Very easily","Never","Only with ATP","A"]
[33,"Charged ions cross membranes using?","Transport proteins","Diffusion","Osmosis","Lipids","A"]
[34,"Lipid bilayer is?","Semi-permeable","Fully permeable","Rigid","Protein only","A"]
[35,"Transport proteins mainly help move?","Hydrophilic substances","Hydrophobic substances","DNA","ATP","A"]
[36,"Channel proteins provide?","Corridors","Energy","ATP","Enzymes","A"]
[37,"Aquaporins transport?","Water","Glucose","Ions","Proteins","A"]
[38,"Aquaporins allow passage of?","Water only","All molecules","ATP","Proteins","A"]
[39,"Carrier proteins work by?","Changing shape","Forming pores","Breaking membrane","Using DNA","A"]
[40,"Transport proteins are?","Specific to passengers","Random","Non-specific","Always active","A"]
[41,"Diffusion results from?","Thermal motion","ATP use","Protein pumps","Active transport","A"]
[42,"Molecule movement in diffusion is?","Random","Directional","Upward","Against gradient","A"]
[43,"Net diffusion moves from?","High to low concentration","Low to high","Equal concentrations","Inside to outside","A"]
[44,"Diffusion requires energy?","No","Yes","Only ATP","Sometimes","A"]
[45,"Passive transport is?","Diffusion across membrane","Against gradient","With ATP","Protein synthesis","A"]
[46,"Osmosis is diffusion of?","Water","Ions","Proteins","Solutes","A"]
[47,"Tonicity describes?","Ability to gain or lose water","ATP level","Protein activity","Membrane strength","A"]
[48,"Isotonic solution causes cell to?","Stay same size","Burst","Shrink","Divide","A"]
[49,"Hypertonic solution causes cell to?","Shrink","Burst","Stay same","Divide","A"]
[50,"Cells without rigid wall in hypertonic solution?","Shrink","Burst","Divide","Die instantly","A"]
[51,"Facilitated diffusion uses?","Transport proteins","ATP","DNA","Enzymes","A"]
[52,"Channel proteins allow movement of?","Specific ions or molecules","All molecules","Proteins only","Water only","A"]
[53,"Kidneys need aquaporins to?","Prevent dehydration","Make ATP","Produce glucose","Filter proteins","A"]
[54,"Ion channels transport?","Ions","Proteins","Water","Glucose","A"]
[55,"Carrier proteins differ from channels because they?","Change shape","Form pores","Are lipids","Use DNA","A"]
[56,"Active transport moves substances?","Against concentration gradient","Down gradient","Randomly","Without proteins","A"]
[57,"Active transport requires?","ATP","Diffusion","Osmosis","No energy","A"]
[58,"Electrogenic pumps create?","Membrane potential","ATP","Water flow","pH change","A"]
[59,"Main electrogenic pump in plants is?","Proton pump","Sodium pump","Calcium pump","Water pump","A"]
[60,"Cotransport uses?","Gradient of one substance","ATP only","Diffusion only","No proteins","A"]
[61,"Bulk transport moves?","Large molecules","Ions only","Small molecules","DNA only","A"]
[62,"Exocytosis is?","Vesicles fusing with membrane","Cell eating","Cell drinking","Diffusion","A"]
[63,"Endocytosis is?","Vesicle formation inward","Secretion","Diffusion","Active transport","A"]
[64,"Phagocytosis involves?","Engulfing large particles","Liquids only","Small ions","Water only","A"]
[65,"Pinocytosis involves?","Extracellular fluid uptake","Large particles","Cell eating","DNA","A"]
[66,"Receptor-mediated endocytosis is?","Specific ligand uptake","Non-specific","Diffusion","Osmosis","A"]
[67,"Endocytosis and exocytosis help?","Remodel membrane","Destroy membrane","Stop transport","Remove proteins","A"]
[68,"Fluid mosaic model describes membranes as?","Fluid with proteins","Rigid","Static","Lipid only","A"]
[69,"Selective permeability is due to?","Lipid bilayer structure","Proteins only","Carbohydrates","DNA","A"]