Class 9 - Pearson - Biology - Cell - Fundamental Unit of LifeContact Number: 8527521718Class 9 - Pearson - Biology - Cell - Fundamental Unit of LifeContact Number: 8527521718Rigid non-living component of the cell is called ______________.
The outer most layer of the cell wall connecting the two adjoining cells is known as ______________.
Intercellular transportation of material from one cell to the other cell takes place by_______________.
Cell membrane is chemically made up of ______________ and _____________.
The component which is considered as dynamic part of the cell is ______________.
The folds of plasma membrane in bacterial cells are known as ____________.
The part of the cytoplasm excluding the organelles is called _______________.
Homeostasis in the cell is maintained by __________________.
Genes are made up of complex chemical substance known as _____________.
Energy stored in mitochondria is in the form of __________________.
Membrane covering the vacuole is known as ______________.
Metabolism of fats in the cell takes place by _____________.
Groups of ribosomes in the cell are known as ______________.
The cell organelles which contain hydrolytic enzyme is ____________.
In liver cells, the smooth endoplasmic reticulum produces enzymes that help in ___________________.
The cell organelles that release oxygen are ______________.
The cell organelle which is found abundant in glandular cell is ________________.
Plastids present in flowers and fruits are called ______________.
_______________ are considered as kitchen of the cell.
'Master control of the cell' or 'cell brain' is _________________.
(1) mitochondria
(2) ribosomes
(3) nucleus
(4) plastids
The cell wall is not involved in _______________.
(1) absorption
(2) secretion
(3) osmoregulation
(4) translocation
In certain fungi, many nuclei are present in their single large body. This is known as ___________ condtion.
(1) syncytium
(2) multicellular
(3) coenocytic
(4) unicellular
What happens to the cell when it is placed in salt slution?
(1) Bursts
(2) Shrinks
(3) Swells
(4) No effect
Cell theory states that cells are structural and fundamental units of _____________.
(1) plants
(2) animals
(3) both plants and animal
(4) only microorganisms.
The structure that imparts turgidity and rigidity to the cell is _______________.
(1) vacuole
(2) ribosome
(3) cell wall
(4) cell membrane
The physiological process that helps in the uptake of water and salts in plants is ____________.
(1) diffusion
(2) photosynthesis
(3) respiration
(4) osmosis
Which of the following organelles is enclosed in a single membrane?
(1) Nuclei
(2) Lysosomes
(3) Chloroplasts
(4) Mitochondria
Identify the organelle which is commonly seen in both plant cell and animal cell.
(1) Centriole
(2) Tonoplast
(3) Mitochondria
(4) Both (a) and (b)
Identify the protein factories of the cell.
(1) Lysosomes
(2) Chloroplasts
(3) Mitochondria
(4) Ribosomes
Identify the incorrect match.
(1) Vesicles - Golgi complex
(2) Grana - Chloroplast
(3) Ribosomes - Mitochondria
(4) Chromosomes - Nucleus
The stack of thylakoids of chloroplast is called ________________.
(1) matrix
(2) granum
(3) stroma
(4) oxysomes
The solution filled in vacuole is called _____________.
(1) nuclear sap
(2) cytoplasm
(3) cell sap
(4) latex
The cell organelle which helps in the synthesis of fats in adipose tissue is ____________.
(1) smooth endoplasmic reticulum
(2) rough endoplasmic reticulum
(3) mitochondria
(4) adipocytes
Synthesis of ATP in mitochondria takes place in/on __________________.
(1) matrix
(2) cristae
(3) outer membrane
(4) between membrane
The energy currency of the cell is _______________.
(1) mitochondria
(2) ATP
(3) FAD
(4) glucose
The colourless proteinaceous matrix of chloroplast is ________________.
(1) grana
(2) cytoplasm
(3) thylakoids
(4) stroma
Mature erythrocytes cannot utilize glucose because they lack ______________.
(1) enzymes
(2) Golgi complex
(3) mitochondria
(4) nucleus
In which of the following cases, conversion of leucoplasts to chloroplasts is observed?
(i) Tubers of radish
(ii) Potato tubers
(iii) Ovary of tomato
(iv) Maize kernels
(1) (i) and (ii)
(2) (ii) and (iii)
(3) (i) and (iv)
(4) (ii) and (iv)
What happens if lysosomes get ruptured in the cell?
(1) Cell dies
(2) Cell swells
(3) Cell shrinks
(4) No change
Define phagocytosis.
Explain the structure of plasma membrane. What are its major functions?
Define the following:
(a) Diffusion
(b) Osmosis
(c) Plasmolysis
(d) Imbibition
What is nucleolus? Explain its function.
Explain the structure of a bacterial cell.
Define cell and justify that division of labour is seen within the cell.
There is no relation between the size of an animal and the size of cell. Justify your answer.
When does the plant lose stiffness and droop?
Distinguish between exocytosis and endocytosis.
Why is nucleus considered as the most important part of the cell?
Differentiate between chromosome and chromatin network.
Cell is the fundamental unit of life. Do you agree with the statement?
Plasma membrane has fluid-mosaic model. Justify your statement.
Write short notes on Golgi complex.
Mention the functions of cristae in mitochondria.
Define autolysis. Name the cell organelle involved in it.
Mention the functions of the following organelles.
(a) Endoplasmic reticulum
(b) Golgi complex
(c) Mitochondria
Explain the structures of:
(1) Mitochondria
(2) Chloroplasts
What are the different kinds of plastids? Mention their location and function.
Complete the following table:
Made up of lipid Gives shape to
.................... bilayer the cell
Golgi complex ..................... .......................
................. Extends from the ........................
nuclear membrane.
.................... Fluid-filled or solid- ........................
filled spaces covered
by tonoplast.
Differentiate between centrosome and centrioles.
Where do you find vacuoles? Give their functions.
Potatoes are generally brown in colour. But, we find some green areas on potatoes. Give reason.
What are mesosomes? Where do you find them? Mention their functions.
Well-defined nucleus is absent in prokaryotes. Justify your statement.
Why do you consider RBC as living cell though it lacks nucleus?
What happens when Rhoeo leaf is placed in boiling water and later transferred to strong sugar solution?
Viruses are living organisms without cells. Give reason.
Why is salt added to the vegetables with high water content before cooking?
Cells without nuclei cannot survive for a longer period. Give reason.
Plasmids help in survival of bacteria. Give reason.
Explain the biological principle involved in the storage of jams and pickles by adding excess sugar and salt, respectively.
Kidney beans are soaked overnight before cooking.
(a) What is the observation you find after soaking?
(b) Name the phenomenon involved in the above observation. Explain the reason.
(c) Do you find the same change when a raw egg is placed in water? Justify that.
In an experiment, red bood cells of humans and cells of thin onion peel are kept in water separately. What observations do you find? Why?
Few dried apricots are placed in beaker 'A' and beaker 'B' for some time. It is found that they shrank in beaker 'A' and became swollen in beaker 'B'. What conclusions can you draw regarding the nature of liquids in beakers 'A' and 'B'? Give justification.
After washing clothes for a long time, the skin on the fingers appears to shrink. Give reason.
What happen if a child consumes concentrated solution of common salt?
Identify the odd one among the following and justify that.
(a) Bacteria; Insect; Earthworm; Hydra
(b) Polythene; Egg membrane; cell membrane; Onion peel
(c) Nucleus; Chromosomes; Genes; Lysosomes
(d) Cellulose; Hemicellulose; Suberin; Protein
Mitochondria are known as power houses of the cell. Give reason.
Lysosomes are called by different names such as suicidal bags of the cell, cells waste disposal system or demolition squads. Justify.
The inner membrane of mitochondria possesses finger-like projections. Give reason.
More number of mitochondria are found in actively dividing cells. Give reason.
Identify the odd one among the following and justify. Chloroplast; Mitochondria; Leucoplast; Chromoplast.
Mitochondria and plastids are known as semi-autonomous organelles of the cell. Give reason.
Assertion (A): Plasma membrane contains bimolecular lipid layer, the surface of which is interrupted by proteins.
Reason (R): Selective permeability of plasma membrane is explained with the help of fluid mosaic model.
(1) Both A and R are true and R is the correct explanation for A.
(2) Both A and R are true, but R is not the correct explanation for A.
(3) A is true and R is false.
(4) A is false and R is true.
Assertion (A): Deposition of suberin on the walls makes them impermeable to water.
Reason (R): Cell wall is multilayered with usually three layers.
(1) Both A and R are true and R is the correct explanation for A.
(2) Both A and R are true, but R is not the correct explanation for A.
(3) A is true and R is false.
(4) A is false and R is true.
Assertion (A): Human RBCs lack nucleus.
Reason (R): RBCs perform the function of transportation of food materials.
(1) Both A and R are true and R is the correct explanation for A.
(2) Both A and R are true, but R is not the correct explanation for A.
(3) A is true and R is false.
(4) A is false and R is true.
Assertion (A): Endocytosis takes place only in animal cells.
Reason (R): Animal cell does not possess cell wall.
(1) Both A and R are true and R is the correct explanation for A.
(2) Both A and R are true, but R is not the correct explanation for A.
(3) A is true and R is false.
(4) A is false and R is true.
Assertion (A): Phagocytosis is the intake of solid material by the cell through cell membrane.
Reason (R): Phagocytosis leads to the formation of food vacuole.
(1) Both A and R are true and R is the correct explanation for A.
(2) Both A and R are true, but R is not the correct explanation for A.
(3) A is true and R is false.
(4) A is false and R is true.
Assertion (A): Smooth endoplasmic reticulum is associated with synthesis of lipids.
Reason (R): Smooth endoplasmic reticulum possesses ribosomes.
(1) Both A and R are true and R is the correct explanation for A.
(2) Both A and R are true, but R is not the correct explanation for A.
(3) A is true and R is false.
(4) A is false and R is true.
Assertion (A): Lysosomal enzymes work best at acidic pH.
Reason (R): Lysosomes contain as many as 40 kinds of hydrolytic enzymes.
(1) Both A and R are true and R is the correct explanation for A.
(2) Both A and R are true, but R is not the correct explanation for A.
(3) A is true and R is false.
(4) A is false and R is true.
Assertion (A): Energy is stored in mitochondria in the form of ATP.
Reason (R): Mitochondria possess DNA.
(1) Both A and R are true and R is the correct explanation for A.
(2) Both A and R are true, but R is not the correct explanation for A.
(3) A is true and R is false.
(4) A is false and R is true.
Assertion (A): Chromoplasts do not help in photosynthesis.
Reason (R): Chromoplasts contain green coloured pigment.
(1) Both A and R are true and R is the correct explanation for A.
(2) Both A and R are true, but R is not the correct explanation for A.
(3) A is true and R is false.
(4) A is false and R is true.