CLASS 9TH SCIENCE CHAPTER 5 IMPORTANT QUESTIONS
SUBHAM TUTORIAL
A. QUESTION AND ANSWERS
Q.1 Define cell. (1 Mark)
Ans- Cell is the basic structural and functional unit
of life. In Latin cell means small compartments.
Q.2 Cell is called structural and functional unit of life. justify the statement. (3 Marks)
Ans- Each cell acquires a distinct structure and
function due the organisation of the membranes and organelles in a specific way.Therefore each type of cell has basic structural organisation.
This organisation helps different cells to perform
certain basic functions like respiration,foodintake,
excretion of waste material,etc.
Q.3 What is the different type of cells on the basis of nuclear material found inside? (2 Marks)
Ans- Accordingtthe presence and absence of well
defined nucleus, cell is divided into two:
(A) Prokaryotic cell
(B) Eukaryotic cell
Q.4 what are eukaryotic cells? (2Marks)
Ans- The cells which are advanced and possess a
well defined nucleus are known as eukaryotic
cells. Membrane bound organelles like chloroplast,
mitochondria, Golgi bodies, etc are present.
These cells are further divided into plant and
animal cells.
Q.5 What are prokaryotic cells?
Ans- The cells which do not possess well defined
nucleus are called prokaryotic cells. These cells are
primitive without having membrane bound organelles.
Example: bacteria, blue green, algae.
(5 Marks)
Ans- Micrographia
Q.21 Name the largest cell found.(1 Mark)
Ans- Ostrich egg
Q.22 Name the cell present in the body which is of greatest length.(1 Mark)
Ans- Nerve cell
Q.23 Name the smallest and largest cell in human body. (1Mark)
Ans- (a) Bacteria and blue green algae.
A. QUESTION AND ANSWERS
Q.1 Define cell. (1 Mark)
Ans- Cell is the basic structural and functional unit
of life. In Latin cell means small compartments.
Q.2 Cell is called structural and functional unit of life. justify the statement. (3 Marks)
Ans- Each cell acquires a distinct structure and
function due the organisation of the membranes and organelles in a specific way.Therefore each type of cell has basic structural organisation.
This organisation helps different cells to perform
certain basic functions like respiration,foodintake,
excretion of waste material,etc.
Q.3 What is the different type of cells on the basis of nuclear material found inside? (2 Marks)
Ans- Accordingtthe presence and absence of well
defined nucleus, cell is divided into two:
(A) Prokaryotic cell
(B) Eukaryotic cell
Q.4 what are eukaryotic cells? (2Marks)
Ans- The cells which are advanced and possess a
well defined nucleus are known as eukaryotic
cells. Membrane bound organelles like chloroplast,
mitochondria, Golgi bodies, etc are present.
These cells are further divided into plant and
animal cells.
Q.5 What are prokaryotic cells?
Ans- The cells which do not possess well defined
nucleus are called prokaryotic cells. These cells are
primitive without having membrane bound organelles.
Example: bacteria, blue green, algae.
Fig:- Prokaryotic cell
Q.6 The cells which do not possess a well defined nucleus. These cells are primitive without having
membrane bound organelles. (1 Mark)
Ans- Prokaryotic cell ,example: bacteria.
Q.7 Differentiate between unicellular and multicellular organisms. (3 Marks)
Ans-
Q.8 Differentiate between prokaryotic and eukaryotic cells (3 Marks)
Ans-
Q.9 Draw a well labelled diagram of plant cell.
Q.10 Draw a well labelled diagram of animal cell.
(5 Marks)
Q. 11 Write the characteristics of cell. (3 Marks)
Ans- Cells are the structural and functional unit of life.Cells size ranges from 1 to 100 micrometer
Cells can replicate independently. Cells Contain
hereditary information due to presence of nucleus or nucleoid.Cells perform all the life sustaining activities by themselves.
Q.12 Why is virus an exception to cell theory?
(2 Marks)
Ans- Virus donot have any membrane and therefore do not show characteristics of life until and unless they enter a living organism and utilizes their cell machinery to increase their
number. To cell theory is not true for virus.
Q.13 The discovery of cell was done by which scientist? (1 Mark)
Ans- Robert hooke in 1965 discovered cell in the
thin slice of cork under microscope
Q.14 name the scientist who discovered cell in the
pond water with advanced microscope(1 mark)
Ans- Leeuwenhoek
Q.15 who discovered nucleus in the cell? (1 mark)
Ans- Robert brown
Q.16 cell theory was proposed by which scientists?
(1 mark)
Ans- schleiden and schwann
Q.17 which scientist coined the term protoplasm?
(1mark)
Ans-Purkinjee
Q.18 'cells arise from the pre existing cells' this
concept was given by which scientists ? (1 mark)
Ans- Virchow
Ans- Virchow
Q.19 To which of the substance does robert hooke
sees the resemblance of slice of the cork from a
Tree. (1 mark)
Ans- Honeycomb
Q.20 Name the book written by Robert Hooke on his discovery of cell. (1 Mark)
Ans- Micrographia
Q.21 Name the largest cell found.(1 Mark)
Ans- Ostrich egg
Q.22 Name the cell present in the body which is of greatest length.(1 Mark)
Ans- Nerve cell
Q.23 Name the smallest and largest cell in human body. (1Mark)
Ans - Smallest-sperm,Largest -ovum
Q.24 Give an example of-
(a) Prokaryotic organisms
(b) Eukaryotic organisms
Q.24 Give an example of-
(a) Prokaryotic organisms
(b) Eukaryotic organisms
(c) Unicellular organism
(d) multicellular organism (2 Marks)
Ans- (a) Bacteria and blue green algae.
(b) Humans and plants
(c) Amoeba and yeast
(c) Amoeba and yeast
(d) Mango tree and tiger
Q.25 Write a short note on cell theory. (3 Marks)
Q.25 Write a short note on cell theory. (3 Marks)
Ans- The postulates of cell theory:
(a) All the organisms are made up of cell or group of cells.
(b) Cell is the structural and functional unit of life.
(c) All the cells arise from the pre-existing cells.
Q.26 With the help of a diagram show the cells
in the onion peel.(1 mark)
Q.27 What is the basic cell structures present in
eukaryotic cell? (3 Marks)
Ans-
Cell wall,Cell membrane/ plasma membrane,
Vacuole,Lysosomes,Nucleus,Plastids,Mitochondria
Golgi bodies,Endoplasmic reticulum,Ribosomes,
Centriole,Cytoplasm
B.SOME MULTIPLE CHOICE QUESTIONS TO SOLVE
1.The largest cell in the human body is -
(a) Nerve cell
(b) Muscle cell
(C) Liver cell
(d) Kidney cell
2. The barrier between the protoplasm and the other environment in an animal cell-
(a) Cell wall
(b) Nuclear membrane
(c) Tonoplast
(d) Plasma membrane
3. The term cell was given by-
(a) Leeuwenhoek
(b) Robert hooke
(c) Flemming
(d) Robert brown
4. Who proposed the cell theory-
(a Schleiden and schwann
(b) Watson and crick
(c) Darwin and Wallace
(d) Mendal and morgan
5. A plant cell differ from an animal cell in the absence of -
(a) Endoplasmic Reticulum
(b) Mitochondria
(c) Ribosome
(d) Centrioles
6. Centrosome is found in-
(a) Cytoplasm
(b) Nucleus
(c) Chromosomes
(d) Nucleolus
Q.7: The power house of a cell is
(a)Chloroplast
(b) Mitochondria
(c) Golgi apparatus
(d) Nucleolus
Q.8: Within a cell the site of
respiration (oxidation) is the
(a)Ribosome
(b) Golgi apparatus
(c) Mitochondria
(d) Endoplasmic Reticulum
Q.9: Which is called 'Suicidal Bag'?
(a)Centrosome
(b) Lysosome
(c) Mesosome
(d) Chromosome
Q.10: Ribosomes are the center for
(a)Respiration
(b) Photosynthesis
(c) Protein synthesis
(d) Fat synthesis
Q.11: Double membrane is absent in
(a) Mitochondrion
(b) Chloroplast
(c) Nucleus
(d) Lysosome
Q.12: Cell organelle found only in
Plant is
(a) Golgi apparatus
(b) Mitochondria
(c) Plastids
(d) Ribosomes
Q.13: Organisms lacking nucleus
and membrane bound organelle are
(a)Diploids
(b) Prokaryotes
(c) Haploids
(d) Eukaryotes
Q.14: Animal cell is limited by
(a)Plasma membrane
(b) Shell membrane
(c) Cell wall
(d)Basement membrane
Q.15: The network of Endoplasmic
Reticulum is present in the
a)Nucleus
(b) Nucleolus
(c)Cytoplasm
(d) Chromosomes
Q.16: Lysosome are reservoirs of
(a)Fat
(b) RNA
(c) Secretory Glycoprotein
(d) Hydrolytic Enzymes
Q.17: The membrane surrounding
the vacuole of a plant cell is called
(a)Tonoplast
(b) Plasma membrane
(C)Nuclear membrane
(d) Cell wall
Q.18: Cell secretion is done by
(a)Plastids
(b) ER
(c) Golgi apparatus
(d) Nucleolus
Q.19: Centrioles are associated with
(a)DNA synthesis
(b) Reproduction
(c) Spindle formation
(d)Respiration
Q.20: Main difference between
animal cell and plant cell is
(a)Chromosome
(b) Ribosome
(c)Lysosome
(d) Endoplasmic Reticulum
Q.21: Animal cell lacking nuclei
would also lack in
(a) Chromosome
(b) Ribosome
(c) Lysosome
(d) Endoplasmic Reticulum
Q.22: Plasmolysis occurs due to
(a)Absorption
(b Endosmosis
(c)Osmosis
(d)Exosmosis
Q.23: A plant cell becomes turgid
due to
(a) Plasmolysis
(b) Exosmosis
(c) Endosmosis
(d) Electrolysis
Q.24: Solute concentration is higher
in the external solution
(a)Hypotonic
(b) Isotonic
(c) Hypertonic
(d) None of the above
Q.25: A cell placed in hypertonic
solution will
(a)Shrink
(b) Show Plasmolysis
(c) Swell up
(d) No change in shape or size
Q.26: The radiant energy of sunlight
is converted to chemical energy and
is stored as
(a)AMP
(b) ADP
(C)ATP
(d)APP
Q.27: Which of the following
organelle does not have membrane?
(a)Ribosome
(b) Nucleus
(c) Chloroplast
(d)Mitochondria
Q.28: Root hair absorbs water from
soil through
(a) osmosis
(b) Active transport
(c) Diffusion
(d)Endocytosis
Q.29: The number of lenses in
compound light microscope is
(a)2
(b)3
(c)4
(d)1
Q.30: The history of the cell began
in 1665 with the publication of
Micrographia in London by
(a)Robert Hooke
(b) Robert Brown
(c) Strasburger
(d)Dujardin
Q.31: Cell inclusions are
(a)Non-living materials present in the
cytoplasm
(b) Another name of cell organelle
(c) Cytoskeletal framework of cell
(d) Combined name for cell wall and
plasma membrane
Q.32: Which cell organelle is not
bounded by a membrane
(a)Ribosome
(b) Lysosome
(C)ER
(d) Nucleus
Q.33: Which of the following cellular
part possess a double membrane?
(a)Nucleus
(b) Chloroplast
(c) Mitochondria
(d)All of the above
Q.34: Cristae and Oxysomes are
associated with
(a)Mitochondria
(b) Plastids
(c) Golgi apparatus
(d) Plasma membrane
Q.35: Karyotheca is another name of
(a)Nuclear envelope
(b) Nucleus
(c) Nuclear pores
(d)Nucleolus
Q.36: Cell organelle that acts as supporting skeletal
framework of the cell is
(a) Golgi apparatus
(b) Nucleus
(c) Mitochondria
(d) ER
Q.37: Plastids are present in
(a) Animal cell only
(b) Plant cells only
(c)Both animal cells and Plant cells
(d)Neither animal or plant cell
Q.38: Cell wall of plant is chiefly composed of
(a)Hemicellulose
(b) Cellulose
(c)Phospholipids
(d)Proteins
Q.39: Intercellular connections of
plant cells are called
(a) Middle lamella
(b)Microfibrils
(c) Matrix
(d)Plasmodesmata
Q.40: Genes are located on the
(a) Chromosomes
(b)Nucleolus
(c)Nuclear membrane
(d) Plasma membrane
Q.41: Chromatin consists of
(a)RNA
(b) DNA
(c)RNA and histones (proteins)
(d)DNA and histones (proteins)
Q.42: Different types of
chromosomes can be recognized by
the positions of the following
separating the two arms
(a)Centromere
(b) Genes
(c) Spindle
(d) Nucleus
Q.43: Name of the process that
requires energy provided by ATP
(a)Diffusion
(b) Osmosis
(c) Active transport
(d)Plasmolysis
To get latest update keep watching
And follow our site
👇
Comments
Post a Comment