Free Cytoplasmic Organelles MCQs with Answers
158 Cytoplasmic Organelles MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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- A. Smooth Endoplasmic Reticulum
- B. Ribosome
- C. Golgi Complex
- D. Rough Endoplasmic Reticulum
Explanation: Explanation:The phragmoplast is formed by vesicles that originally arise from the Golgi complex.
Correct answer: Golgi Complex- A. Tubulin
- B. Actin
- C. Myosin
- D. Troponin
Explanation: [A] The tubulin proteins α- and β polymerize into long chains or filaments that form microtubules.[B] Actin forms microfilaments in the…
Correct answer: Tubulin- A. Mitochondria
- B. Centrioles
- C. Ribosomes
- D. Lysosomes
Explanation: At the beginning of the nuclear division, two wheel-shaped protein structures called centrioles position themselves at opposite ends of…
Correct answer: Centrioles- A. 9
- B. 18
- C. 108
- D. 36
Explanation: Structure of a Centriole:Each centriole is composed of 9 microtubule triplets arranged in a cylindrical structure, forming the 9+0…
Correct answer: 36- A. Cristae
- B. Cisternae
- C. Lamella
- D. Bifidae
Explanation: Mitochondria are a double-membranous structure with an outer membrane and an inner membrane.
Correct answer: Cristae- A. Smooth Endoplasmic Reticulum
- B. Rough Endoplasmic Reticulum
- C. Golgi Apparatus
- D. Lysosomes
Explanation: Smooth endoplasmic reticulum in liver cells of vertebrates helps in detoxifying poisons and drugs.
Correct answer: Smooth Endoplasmic Reticulum- A. Mitochondria and ribosomes
- B. Cytosol, mitochondria and ribosomes
- C. Golgi bodies, Lysosome and ER
- D. Golgi bodies, lysosome and mitochondria
Explanation: The Golgi bodies, lysosomes, and endoplasmic reticulum are all examples of single membranous organelles.
Correct answer: Golgi bodies, Lysosome and ER- A. Phagocytosis
- B. Primary lysosome and autophagy
- C. Secondary lysosome
- D. Peroxisome
Explanation: Digestive vacuoles and autophagosomes eventually fuse with lysosomes, forming secondary lysosomes.
Correct answer: Secondary lysosome- A. Microtubule
- B. Cilia
- C. Microfilaments
- D. Intermediate filaments
Explanation: Cyclosis (the streaming movement of cytoplasm within a cell) and amoeboid movements (the crawling-like movements of certain cells, such as…
Correct answer: Microfilaments- A. Golgi complex
- B. Rough Endoplasmic Reticulum
- C. Smooth Endoplasmic Reticulum
- D. Ribosomes & chromosomes
Explanation: Proteins and lipids are modified into glycoproteins and glycolipids primarily by the Golgi complex (also known as the Golgi apparatus or…
Correct answer: Golgi complex- A. Enzymes
- B. Cisternae
- C. Pigment
- D. Cristae
Explanation: Chloroplasts are pigmented organelles, i.e, they contain some kind of pigment, which is chlorophyll.
Correct answer: Pigment- A. Intracellular digestion
- B. Autophagy
- C. Autolysis
- D. Processing of cell secretions
Explanation: The Golgi apparatus processes and packages cell secretions by receiving proteins and lipids from the endoplasmic reticulum in transport…
Correct answer: Processing of cell secretions- A. Peroxisomes
- B. Glyoxysomes
- C. Microbodies
- D. Vacuoles
Explanation: Microbodies, which include organelles like peroxisomes and glyoxysomes, are present in plant cells during their normal metabolic…
Correct answer: Glyoxysomes- A. Cytoplasm
- B. Nucleus
- C. Vacuoles
- D. Nuclear pores
Explanation: The cytoplasm is the gel-like fluid inside the cell. It is the medium for chemical reactions.
Correct answer: Nucleus- A. Proteins
- B. Carbohydrates
- C. Phospholipids
- D. Terpendoids
Explanation: rough endoplasmic reticulum (RER), a series of connected flattened sacs, part of a continuous membrane organelle within the cytoplasm of…
Correct answer: Proteins136. A cell fails to detoxity the waste substances produced in it because it does not possess enough:
- A. lysosomes
- B. ribosome
- C. rough endoplasmic reticulum
- D. smooth endoplasmic reticulum
Explanation: The cell organelle responsible for the detoxification of waste substances is the smooth endoplasmic reticulum.
Correct answer: smooth endoplasmic reticulum- A. Peroxisomes
- B. Lysosomes
- C. Glyoxisomes
- D. Ribosomes
Explanation: Glyoxisomes are specialized organelles found only in plants. These contain enzymes for the glyoxylate cycle, through which fats are…
Correct answer: Glyoxisomes- A. A (outer membrane) - regulates molecule passage
- B. B (inner membrane) - forms infoldings called cristae
- C. C (crista) - site of Glycolysis.
- D. D (matrix) - site of Anaerobic fermentation.
Explanation: The correct answer is B (inner membrane) - forms infoldings called cristae.
Correct answer: B (inner membrane) - forms infoldings called cristae- A. Sodium ions
- B. Calcium ions
- C. Potassium ions
- D. Magnesium ions
Explanation: The correct answer is Option D: Magnesium ions. Magnesium ions play a crucial role in stabilizing the ribosome-mRNA complex by…
Correct answer: Magnesium ions- A. Chloroplastids
- B. Proplastids
- C. Chromoplastids
- D. Leucoplastids
Explanation: All types of plastids are produced from proplastids. Proplastids are undifferentiated, non-pigmented plastids that serve as the precursor…
Correct answer: Proplastids