Exam Question for Class 11 Biology Chapter 8 Cell The Unit of Life
Question. Who proposed the theory that “Cells arise only from the pre-existing cells”?
Question. Difference between the prokaryotic and eukaryotic cells in having
(a) cell wall
(b) nuclear membrane
(d) none of these
Question. Extension of plasma membrane in prokaryotic cell is
(d) none of these
Question. Integral proteins of cell membrane occur on/in
(a) inner surfaces
(b) outer surfaces
(c) phospholipid matrix
(d) inner and outer surfaces
Question. The membrane of the erythrocytes has approximately ___% of proteins and ___% lipids.
(a) 42, 50
(b) 52, 40
(c) 50, 50
(d) 60, 40
Question. The best material for study of structure of cell membrane is
(a) RBC of human
(b) RBC of frog
(c) cheek cell of human
(d) liver cell of rat
Question. Which one of the following structures between two adjacent cells is an effective transport pathway?
(c) Endoplasmic reticulum
Question. Which one of the following is not considered as part of the endomembrane system?
(a) Golgi complex
Statement Type Questions
Question. Which of the following statement is correct regarding vacuole?
(a) It is membrane-bound and contains storage proteins and lipids.
(b) It is membrane-bound and contains water and excretory substances.
(c) It lacks membrane and contains air.
(d) It lacks membrane and contains water and excretory substances.
Question. Protein synthesis in an animal cell occurs
(a) on ribosomes present in cytoplasm as well as in mitochondria.
(b) on ribosomes present in the nucleolus as well as in cytoplasm.
(c) only on ribosomes attached to the nuclears envelope and endoplasmic reticulum.
(d) only on the ribosomes present in cytosol.
Question. In prokaryotes, chromatophores are
(a) specialized granules responsible for colouration of cells.
(b) structures responsible for organizing the shape of the organism.
(c) inclusion bodies lying free inside the cells for carrying out various metabolic activities.
(d) internal membrane system which becomes extensive and complex in photosynthetic bacteria.
Matching Type Questions
Question. Match column-I with column-II and choose the correct option.
|A. Tonoplast I. Contain digestive enzyme|
|B. Contractile vacuole II. Store metabolic gases|
|C. Food vacuole III. Excretion|
|D. Air vacuole IV. Transport of ions in plants|
(a) A – IV; B – III; C – I; D – II
(b) A – II; B – III; C – IV; D – I
(c) A – IV; B – II; C – III; D – I
(d) A – I; B – III; C – II; D – IV
Question. Match the items given in column-I with their role given in column-II and choose the correct option.
|A. SER||I. Increase the surface area|
|B. Golgi apparatus||II. Store oils or fats|
|C. Cristae||III. Excretion|
|D. Peroxisome||IV. Photorespiration|
|E. Elaioplasts||V. Synthesis of lipid|
(a) A – V; B – III; C – I; D – IV; E – II
(b) A – V; B – III; C – II; D – IV; E – I
(c) A – II; B – III; C – I; D – IV; E – V
(d) A – III; B – IV; C – I; D – V; E – II
Question. Match column I (cell type) with column II (size) and choose the correct option.
|A. Viruses||I. 1-2 μm|
|B. PPLO||II. 10-20 μm|
|C. Eukaryotic cell||III. About 0.1 μm|
|D. Bacterium||IV. 0.02 – 0.2 μm|
(a) A – I; B – II; C – III; D – IV
(b) A – IV; B – III; C – II; D – I
(c) A – I; B – III; C – II; D – IV
(d) A – IV; B – II; C – III; D – I
Question. Match column-I with column-II and select the correct option.
|Column – I||Column – II|
|A. Golgi apparatus||I. Storage|
|B. Mitochondria||II. Photosynthesis|
|C. Vacuoles||III. Transport|
|D. Grana||IV. Secretion|
(a) A – IV; B – V; C – I: D – II
(b) A – I; B – II; C – IV: D – III
(c) A – IV; B – I; C – II: D – III
(d) A – I; B – II; C – III: D – IV
Critical Thinking Type Questions
Question. Microtubules are absent in
(d) spindle fibres
Question. Most of water, in mature plant cells occurs in
(b) cell wall
Question. What would happen if lysosomes get ruptured in a cell?
(a) Cell dies
(b) Cell shrinks
(c) Cell swell up
(d) Nothing would happen
Question. The fluidity of membranes in a plant in cold weather may be maintained by
(a) increasing the number of phospholipids with unsaturated hydrocarbon tails.
(b) increasing the proportion of integral proteins.
(c) increasing concentration of cholesterol in membrane.
(d) increasing the number of phospholipids with saturated hydrocarbon tail.
Directions for below Questions: : A student was given cell samples (A and B) to identify parts which are highlighted. He observed the samples under the microscope and list down the function of the part of cell sample. The information collected by the student is listed in the table below, on the basis of which
the student infers that the samples contain the organelles.
Question. Identify the part highlighted in the sample A and B and explain why they were called as semi-autonomous organelles?
(a) Sample A – Mitochondria, Sample B – Chloroplast; because both the organelles are double membrane bound structure.
(b) Sample A- Mitochondria, Sample B – Chloroplast; because they both are capable of synthesis of their own proteins only.
(c) Sample A – Mitochondria, Sample B – Chloroplast; because they are capable of synthesis of their own proteins and contain their own DNA.
(d) Sample A- Mitochondria, Sample B – Chloroplast; because they contain their own DNA to transfer the genetic information from one generation to another.
Question. A student placed two cells in the same solution in two different containers. The observation was given in the table.
Which structure maintains the shape of the cell present in container 2 and provides the most significant difference between the two cells?
(b) Cell wall
(d) Cell membrane
Diagram Type Questions
Question. The diagram given below represent a filuid mosaic model of plasma membrance. Match the components marked as A, B, C, D and E in the diagram below from the list (i) to (vii).
(iii) Lipid bilayer
(iv) Integral protein
(vi) Cell wall
(vii) External protein
(a) A – (i), B – (ii), C – (iii), D – (iv), E – (v)
(b) A – (ii), B – (i), C – (iii), D – (iv), E – (v)
(c) A – (i), B – (ii), C – (iii), D – (iv), E – (vi)
(d) A – (i), B – (ii), C – (iii), D – (vii), E – (v)
Question. The following diagram represents a structure chromosome. Identify the structures marked as A, B and C.
(a) A – Satellite, B – Primary constriction, C – Acrocentric
(b) A – Satellite, B – Secondary constriction, C – Metacentric
(c) A – Satellite, B – Centromere, C – Telocentric
(d) A – Satellite, B – Centromere, C – Submetacentric
Question. Which one of the following organelle given below is correctly matched with its function ?
(a) Golgi apparatus– Protein synthesis
(b) Golgi apparatus– Formation of glycolipids
(c) Rough endoplasmic reticulum– Protein synthesis
(d) Rough endoplasmic reticulum– Formation of glycoproteins