Skip to main content Courses Search Donate jericajones 9+ Main content High school biology Unit: Cells NGSS: HS‑LS1.A High school biology Unit: Cells 400 / 800 (50% Mastered) Mastery points Skill Summary Legend (Opens a modal) Introduction to cells Basic cell structures The cell membrane Eukaryotic cell structures Prokaryotes and eukaryotes Plant vs animal cells Unit test Test your knowledge of all skills in this unit Introduction to cells Learn Scale of cells (Opens a modal) Cell theory (Opens a modal) Microscopy (Opens a modal) Introduction to cells review (Opens a modal) Practice Intro to cells Proficient Nice! Ready to move on Basic cell structures Learn Introduction to the cell (Opens a modal) Introduction to cilia, flagella and pseudopodia (Opens a modal) Basic cell structures review (Opens a modal) Practice Identifying cell structures Proficient Nice! Ready to move on Basic cell structures Proficient Nice! Ready to move on The cell membrane Learn Fluid mosaic model of cell membranes (Opens a modal) Structure of the plasma membrane (Opens a modal) The cell membrane review (Opens a modal) Practice The cell membrane Proficient Nice! Ready to move on Eukaryotic cell structures Learn Organelles in eukaryotic cells (Opens a modal) Eukaryotic cell structures review (Opens a modal) Practice Identifying eukaryotic cell structures Proficient Nice! Ready to move on Up next for you: Eukaryotic cell structures Get 5 of 7 questions to level up! Start Prokaryotes and eukaryotes Learn Prokaryotic and eukaryotic cells (Opens a modal) Prokaryotic cells (Opens a modal) Intro to eukaryotic cells (Opens a modal) Mitochondria and chloroplasts (Opens a modal) Prokaryotes and eukaryotes review (Opens a modal) Practice Prokaryotes and eukaryotes Get 3 of 4 questions to level up! Practice Plant vs animal cells Learn Overview of animal and plant cells (Opens a modal) Plant vs animal cells review (Opens a modal) Practice Plant vs animal cells Get 3 of 4 questions to level up! Practice Unit test Level up on all the skills in this unit and collect up to 800 Mastery points! Start Unit test About this unit You, my friend, are made up of cells. Lots and lots of them. Jump in to learn more about prokaryotic and eukaryotic cells and the complex and beautiful structures inside them. Assign to Christina jones No students doing Different questions due by Aug 28th, 11:59 PM Save Assign Eukaryotic cell structures Problem Lysosomal storage diseases (LSDs) are a group of rare and inherited genetic disorders in which some part of the lysosome does not function properly, causing the accumulation of toxic substances in the cell and ultimately, cell death. What would be the most likely explanation as to why the lysosomes of someone with this disease are not functioning properly? Choose 1 Choose 1 (Choice A, Checked) A The enzymes of the lysosome are breaking down too much toxic material. (Choice B) B The enzymes of the lysosome are not breaking down enough toxic material. (Choice C) C The enzymes of the lysosome are beginning to break down the ribosomes of the cell. (Choice D) D The enzymes of the lysosome are beginning to break down the DNA of the cell. Stuck?Watch a video or use a hint. Report a problem Get 5 of 7 questions to level up to Familiar Check Biology is brought to you with support from the Amgen Foundation Biology is brought to you with support from the Our mission is to provide a free, world-class education to anyone, anywhere. Khan Academy is a 501(c)(3) nonprofit organization. Donate or volunteer today! Site Navigation About News Impact Our team Our interns Our content specialists Our leadership Our supporters Our contributors Our finances Careers Internships Contact Help center Support community Share your story Press Download our apps iOS app Android app Courses Math: Pre-K - 8th grade Math: Get ready courses Math: high school & college Test prep Science Computing Arts & humanities Economics Reading & language arts Life skills Change language © 2020 Khan Academy Terms of use Privacy Policy