Class 9 Science Chapter 5 “The Fundamental Unit of Life” MCQ question
Q.1. The organelle that is called the powerhouse of the cell is ______
(a) Golgi bodies
(b) Lysosomes
(c) Mitochondria
(d) Ribosome
Q.2. Vacuoles provide:
(a) Rigidity
(b) Turgidity
(c) Shape
(d) Both (a) and (b)
Q.3. The process which occurs when dry raisins are soaked in water is called _________.
(a) Osmosis
(b) Endosmosis
(c) Endocytosis
(d) Diffusion
Q.4. Before scraping the inner side of cheek to prepare a temporary mount of cheek cell, the mouth is rinsed to:
(a) remove food particles
(b) make it alkaline
(c) avoid injury
(d) make it acidic
Q.5. An undefined nuclear region of Prokaryotes is known as ______
(a) nucleus
(b) nucleoid
(c) nucleolus
(d) nucleic acid
Q.6. While observing an onion peel slide under the microscope, Paheli noted its characteristics. Which of these does she not see?
(a) Cells attached edge to edge without intercellular space
(b) Presence of single nucleus in the cell
(c) Presence of cell wall around each rectangular cell
(d) All of these
Q.7. Which one of the following has their own DNA?
(a) Vacuole
(b) Mitochondria
(c) Golgi bodies
(d) Ribosome
Q.8. A cover slip is placed over the specimen to:
(a) prevent the tissue from drying
(b) prevent glycerine from leaking out
(c) remove extra stain and water
(d) crush the cells in order to see the organelles clearly
Q.9. While observing a human cheek cell, under a microscope, what students will not observe
(a) Nucleolus
(b) Mitochondria
(c) Nucleus
(d) Chloroplast
Q.10. To prepare a temporary stained mount of onion peel, a student must take the material from the:
(a) green leaf of spring onion
(b) thin layer of fleshy leaf base of onion
(c) dry scale leaf of onion
(d) crushed pulp of onion
Q.11. A cell organelle that is not surrounded by a membrane is the ______.
(a) chloroplast
(b) ribosome
(c) endoplasmic reticulum
(d) Golgi apparatus
Q.12. Given below are four operations for preparing a temporary mount of human cheek cells:
(i) Taking a scraping from the inner side of the cheek and spreading it on a clean slide
(ii) Putting a drop of glycerine on the material
(iii) Adding two or three drops of methylene blue
(iv) Rinsing the mouth with fresh water and disinfectant solution
Identify the correct sequence of these operations.
(a) (i)—(ii)—(iii)—(iv)
(b) (iv)—(i)—(iii)—(ii)
(c) (iv)—(i)—(iii)—(ii)
(d) (i)—(iii)—(ii)—(iv)
Q.13. Gaseous exchange in cells takes place by:
(a) Exocytosis
(b) Diffusion
(c) Osmosis
(d) Endocytosis
Q.14. Human cheek cells stained in methylene blue and mounted in glycerine were observed with the help of a compound microscope. The components of the cell which were seen are:
(a) cell wall, cytoplasm, nucleus
(b) plasma membrane, cytoplasm, nucleus, mitochondria
(c) plasma membrane, cytoplasm, nucleus
(d) plasma membrane, cytoplasm, nucleus, mitochondria, lysosomes, Golgi bodies.
Q.15. Identify the common feature of mitochondria and plastids?
(a) Ability to produce ATP
(b) Presence of DNA and ribosomes
(c) Presence of matrix called stroma
(d) Deeply folded inner membrane
16. Colourless plastids are known as
(a) Chromoplasts
(b) Chloroplasts
(c) Leucoplasts
(d) Protoplast
17. Animal cell lacking nuclei would also lack in
(a) Ribosome
(b) Lysosome
(c) Endoplasmic reticulum
(d) Chromosome
18. The phenomenon by which protoplast of a cell shrinks from the wall is
(a) Osmosis
(b) Plasmolysis
(c) Diffusion
(d) Glycolysis
19 Which of the following are examples of prokaryotes?
(a) Algae
(b) Fungi
(c) Bacteria
(d) Protozoa
20. The barrier between the protoplasm and the outer environment in an animal cell is
(a) Cell wall
(b) Plasma membrane
(c) Nuclear membrane
(d) Cytoplasm
21. Ribosomes are the site of
(a) Photosynthesis
(b) Respiration
(c) Protein synthesis
(d) Absorption
22. Which is the largest cell organelle present in plant cell?
(a) Nucleus
(b) Chloroplast
(c) Endoplasmic reticulum
(d) Mitochondria
23. Which of the following can be made into crystal?
(a) A bacterium
(b) An Amoeba
(c) A virus
(d) A sperm
24. 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.
25. Chromosomes are made up of
(a) DNA
(b) protein
(c) DNA and protein
(d) RNA.
26. Which of these options are not functions of ribosomes?
(i) It helps in manufacture of protein molecules.
(ii) It helps in manufacture of enzymes.
(iii) It helps in manufacture of hormones.
(iv) It helps in manufacture of starch molecules.
(a) (i)and(ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (iv) and (i)
27 . Which of these is not related to endoplasmic reticulum?
(a) It behaves as transport channel for proteins between nucleus and cytoplasm.
(b) It transports materials between various regions in cytoplasm.
(c) It can be the site of energy generation.
(d) It can be the site for some biochemical activities of the cell.
28. Following are a few definitions of osmosis. Read carefully and select the correct definition.
(a) Movement of water molecules from a region of higher concentration to a region of lower concentration through a semi- permeable membrane.
(b) Movement of solvent molecules from its higher concentration to lower concentration.
(c) Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane.
(d) Movement of solute molecules from lower concentration to higher concentration of solution through a semi-permeable membrane.
29. Plasmolysis in a plant cell is defined as
(a) breakdown (lysis) of plasma membrane in hypotonic medium
(b) shrinkage of cytoplasm in hypertonic medium
(c) shrinkage of nucleoplasm
(d) none of them
30. Which of the following are covered by a single membrane?
(a) Mitochondria
(b) Vacuole
(c) Lysosome
(d) Plastid
31. Find out the false sentences.
(a) Golgi apparatus is involved with the formation of lysosomes.
(b) Nucleus, mitochondria and plastid have DNA; hence they are able to make their own structural proteins.
(c) Mitochondria is said to be the power house of the cell as ATP is generated in them.
(d) Cytoplasm is called as protoplasm.
32. Find out the correct sentence.
(a) Enzymes packed in lysosomes are made through RER (rough endoplasmic reticulum).
(b) Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein respectively.
(c) Endoplasmic reticulum is related with the destruction of plasma membrane.
(d) Nucleoid is present inside the nucleoplasm of eukaryotic nucleus.
33. Which cell organelle plays a crucial role in detoxifying many poisons and drugs in a cell?
(a) Golgi apparatus
(b) Lysosomes
(c) Smooth endoplasmic reticulum
(d) Vacuoles
34.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.
35. The undefined nuclear region of prokaryotes are also known as
(a) nucleus
(b) nucleolus
(c) nucleic acid
(d) nucleoid
36. The cell organelle involved in forming complex sugars from simple sugars are
(a) endoplasmic reticulum
(b) ribosomes
(c) plastids
(d) Golgi apparatus.
37. Which out of the following is not a function of vacuole?
(a) Storage
(b) Providing turgidity and rigidity to the cell
(c) Waste excretion
(d) Locomotion
38.Amoeba acquires its food through a process, termed
(a) exocytosis
(b) endocytosis
(c) plasmolysis
(d) exocytosis and endocytosis both.
39.Cell wall of which one of these is not made up of cellulose?
(a) Bacteria
(b) Hydrilla
(c) Mango tree
(d) Cactus
40.Silver nitrate solution is used to study
(a) endoplasmic reticulum
(b) Golgi apparatus
(c) nucleus
(d) mitochondria.
41.Organelle other than nucleus, containing DNA is
(a) endoplasmic reticulum
(b) Golgi apparatus
(c) mitochondria
(d) lysosome.
42.Kitchen of the cell is
(a) mitochondria
(b) endoplasmic reticulum
(c) chloroplast
(d) Golgi apparatus.
43 Lipid molecules in the cell are sythesised by
(a) smooth endoplasmic reticulum
(b) rough endoplasmic reticulum
(c) Golgi apparatus
(d) plastids.
44.Cell arises from pre-existing cell was stated by
(a) Haeckel
(b) Virchow
(c) Hooke
(d) Schleiden.
45. Cell theory was given by
(a) Schleiden and Schwann
(b) Virchow
(c) Hooke
(d) Haeckel.
46. The only cell organelle seen in prokaryotic cell is
(a) mitochondria
(b) ribosomes
(c) plastids
(d) lysosomes.
47. 0rganelie without a cell membrane is
(a) ribosome
(b) Golgi apparatus
(c) chloroplast
(d) nucleus.
49. 1 µm is
(a)10-6m
(b) 10-9m
(c) 10-10m
(d) 10-3m
50.Lysosome arises from
(a) endoplasmic reticulum ,
(b) Golgi apparatus
(c) nucleus
(d) mitochondria.