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Class 9 Biology · Chapter 3 · Test 2

Cell Organelles

24 MCQs on Ribosomes, Endoplasmic Reticulum, Golgi Apparatus, Lysosomes, Mitochondria, Plastids, Vacuoles, and Centrioles

MCQs

24 questions · 20 min · 24 marks

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Sample questions

The first 5 of 24. Try each one, then tap to see the answer.

  1. Question 1

    What is the main function of ribosomes?

    • AProtein synthesis
    • BLipid synthesis
    • CEnergy production
    • DWaste removal
    Show answer

    Answer: A

    Ribosomes are the sites of protein synthesis.

  2. Question 2

    Ribosomes are composed of?

    • ARNA and protein
    • BDNA and lipids
    • CCarbohydrates and lipids
    • DCellulose and protein
    Show answer

    Answer: A

    Ribosomes contain ribosomal RNA and protein.

  3. Question 3

    Where can ribosomes be found in eukaryotic cells?

    • AFreely in cytoplasm and on rough endoplasmic reticulum
    • BOnly inside the nucleus
    • COnly inside mitochondria
    • DOnly on the cell membrane
    Show answer

    Answer: A

    Ribosomes may float freely in the cytoplasm or attach to rough ER.

  4. Question 4

    How many subunits does a ribosome have?

    • ATwo
    • BOne
    • CThree
    • DFour
    Show answer

    Answer: A

    Each ribosome consists of two subunits that unite during protein synthesis.

  5. Question 5

    What is the endoplasmic reticulum?

    • AA network of membrane-bounded channels
    • BA group of digestive enzymes
    • CA rigid cell wall
    • DA DNA-containing organelle
    Show answer

    Answer: A

    The endoplasmic reticulum is a network of membrane-bounded channels in eukaryotic cells.

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