MCQ Questions for Class 9 Science: Ch 5 The Fundamental Unit of Life
1. The process of plasmolysis in plant cell is defined as:
(a) Breakdown of plasma membrane in hypotonic solution.
(b) Shrinkage of cytoplasm in hypertonic medium.
(c) Shrinkage of Nucleoplasm.
(d) None of these
► (b) Shrinkage of cytoplasm in hypertonic medium.
2. The proteins and lipids, essential for building the cell membrane, are manufactured by
(a) rough endoplasmic reticulum
(b) Golgi apparatus
(c) plasma membrane
(d) mitochondria
► (a) rough endoplasmic reticulum
3. Engulfing of food materials or foreign bodies by cells like Amoeba is called
(a) diffusion
(b) endocytosis
(c) osmosis
(d) plasmolysis
► (b) endocytosis
4. Animal cell lacking nuclei would also lack in
(a) Endoplasmic reticulum
(b) Chromosome
(c) Lysosome
(d) Ribosome
► (b) Chromosome
5. Middle lamella occurs:
(a) Inner to primary wall
(b) Inner to secondary wall
(c) Outer to secondary wall
(d) Outer to primary wall
► (d) Outer to primary wall
6. A cell will swell up if
(a) the concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium
(b) the concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell
(c) the concentration of water molecules is same in the cell and in the surrounding medium
(d) concentration of water molecules does not matter
► (b) the concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell
7. Cell wall is absent in
(a) Plants
(b) Bacteria
(c) Fungi
(d) Mycoplasma
► (d) Mycoplasma
8. Name two cell regions containing their own genetic material.
(a) Mitochondria and Plastids
(b) Lysosomes and ribosomes
(c) Nucleus and mitochondria
(d) Golgi apparatus and endoplasmic reticulum
► (a) Mitochondria and Plastids
9. Cartilage matrix is digested during its osteogenesis through:
(a) Intracellular autophagic activity
(b) Extracellular lysosomal activity
(c) Intracellular heterophagic activity
(d) Both B and C
► (b) Extracellular lysosomal activity
10. Nuclei were first discovered by
(a) Strasburger
(b) Fonatana
(c) Robert Brown
(d) Robert Koch
► (c) Robert Brown
11. Which of the following is not a function of golgi apparatus?
(a) Detoxification of poisons and drugs
(b) Storage and packaging of products
(c) Formation of lysosomes
(d) Production of complex sugars
► (a) Detoxification of poisons and drugs
12. Ribosomes are the centre for
(a) Respiration
(b) Proteins synthesis
(c) Photosynthesis
(d) Fat synthesis
► (b) Proteins synthesis
13. Golgi apparatus takes part in synthesis of:
(a) Glycolipids
(b) Glycoproteins
(c) Hormones
(d) All the above
► (d) All the above
14. Name the plastid important for photosynthesis in plants.
(a) Leucoplast
(b) Chromoplast
(c) Chloroplast
(d) Cytoplast
► (c) Chloroplast
15. In plant cells, many substances important for life are stored in
(a) plastids
(b) mitochondria
(c) vacuoles
(d) lysosomes
► (c) vacuoles
16. Which of the following is correct for prokaryotic ribosome:
(a) It dissociates into 50S and 30S
(b) It dissociates into 40S and 40S
(c) It dissociates into 60S and 20S
(d) It dissociates into 70S and 30S
► (a) It dissociates into 50S and 30S
17. In a cell DNA is found in:
(a) Nucleus, mitochondria and plastid
(b) Nucleus, mitochondria and Golgi body
(c) Mitochondria, Golgi body and plastid
(d) Nucleus, Golgi body and plastid
► (a) Nucleus, mitochondria and plastid
18. eRF1 is the release factor in eukaryotes that requires
(a) ATP for its binding to ribosome
(b) GTP for its binding to ribosome
(c) ATP and GTP for its binding to ribosome
(d) Mn2+for its binding to ribosome
► (b) GTP for its binding to ribosome
19. The most abundant material in plant cell wall is
(a) cellulose
(b) lipids
(c) proteins
(d) wax
► (a) cellulose
20. Different layers of cell wall are:
(a) Middle lamella and primary wall
(b) Middle lamella, Primary wall and secondary wall
(c) Primary wall and secondary wall
(d) Wall layers exclude middle lamella
► (b) Middle lamella, Primary wall and secondary wall
(a) Middle lamella and primary wall
(b) Middle lamella, Primary wall and secondary wall
(c) Primary wall and secondary wall
(d) Wall layers exclude middle lamella
► (b) Middle lamella, Primary wall and secondary wall
21. Which organelle is called the suicide bag of the cell
(a) Golgi bodies
(b) Centrosome
(c) Chloroplast
(d) Lysosome
► (d) Lysosome
22. The primary function of smooth endoplasmic reticulum in liver cells is
(a) protein synthesis
(b) catabolism of proteins
(c) detoxification
(d) carbohydrate metabolism
► (c) detoxification
23. What is the full form of ATP?
(a) Adeno tri phosphate
(b) Adeno tri phosphorus
(c) Adenosine tetra phosphate
(d) Adenosine tri phosphate
► (d) Adenosine tri phosphate
24. Which of the following acts as garbage disposal system of the cell?
(a) Golgi body
(b) Vacuole
(c) Peroxisome
(d) Lysosome
► (d) Lysosome
25. Which organelle is called power of house of the cell-
(a) Plastids
(b) Mitochondria
(c) Ribosomes
(d) Golgi apparatus
► (b) Mitochondria
26. Most of the substances in the living world are transported across the cell membrane by the process of
(a) osmosis
(b) endocytosis
(c) diffusion
(d) plasmolysis
► (a) osmosis
27.Animal cell lacking nuclei would also lack in
(a) Endoplasmic reticulum
(b) Chromosome
(c) Lysosome
(d) Ribosome
► (b) Chromosome
28. Find out the correct sentence.
(a) Enzymes packed in lysosomes are made through RER
(b) Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein respectively
(c) Endoplasmic reticulum is related to the destruction of plasma membrane
(d) Nucleoid is present inside the nucleoplasm of eukaryotic nucleus
► (a) Enzymes packed in lysosomes are made through RER