The Fundamental Unit of Life Class 9 MCQ. We covered all the Fundamental Unit of Life Class 9 MCQ in this post for free so that you can practice well for the exam.
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The Fundamental Unit of Life Class 9 MCQ for Students
From the following which pair of cell organelles have circular DNA molecules?
(A) Lysosome and Chloroplast
(B) Cell wall and Mitochondria
(C) Vacuole and Chloroplast
(D) Chloroplast and Mitochondria
Option d – Chloroplast and Mitochondria
Which of the following ability will be lost by the cell if the cell wall of a plant cell is removed? ( The Fundamental Unit of Life Class MCQs )
(A) Prevention of endosmosis
(B) Prevention of over-expansion of cell
(C) Exosmosis by cell
(D) Shrinking of nucleoplasm
Option b – Prevention of over-expansion of cell
From the following identify the CORRECT pair.
(A) Ribosome – Lipid synthesis
(B) Contractile vacuole – Excretion
(C) Mitochondrion – Thylakoids
(D) RER- Prokaryotic cell
Option b – Contractile vacuole – Excretion
Identify the INCORRECT statement/s about mitochondria and chloroplast. i. Both are semi-autonomous organelles. ii. Both are found only in eukaryotes. iii. Both have 80S type of ribosomes. iv. Both are enveloped by two unit membranes.
(A) Both (i) and (iii)
(B) Both (iii) and (iv)
(C) Only (iii)
(D) Only (iv)
Option c – Only (iii)
Study the following statements (i – v) and select the correct option. i. Flagella are comparatively smaller than cilia. ii. Hydrolytic enzymes are optimally active at an alkaline pH. iii. Cilia are comparatively smaller than flagella. iv. Mitochondria can be viewed easily under the microscope without staining. V. Microbodies are non-membrane-bound minute vesicles. ( The Fundamental Unit of Life Class MCQs )
(A) i, iii, iv, and v are correct.
(B) i, ii, and iii are correct.
(C) iv and v are correct.
(D) i, ii, iv, and v are incorrect.
Option d – i, ii, iv, and v are incorrect.
From the following which is the INCORRECT statement?
(A) Transport of molecules across the plasma membrane occurs by active transport, passive transport, and osmosis.
(B) Passive transport requires energy.
(C) Active transport is an energy-dependent process.
(D) Osmosis is the movement of water by diffusion across a selectively permeable membrane.
Identify the innermost layer of the cell envelope in the bacterial cells. ( The Fundamental Unit of Life Class MCQs )
(A) Cell wall
(B) Glycocalyx
(C) Plasma membrane
(D) Capsule
Option c – Plasma membrane
Which of the following is translated into proteins by the ribosomes of a polysome?
(A) rRNA
(B) DNA
(C) mRNA
(D) tRNA
Option c – mRNA
Mesosomes are extensions of ……. ( The Fundamental Unit of Life Class MCQs )
(A) endoplasmic reticulum
(B) nuclear membrane
(C) chloroplasts
(D) plasma membrane
Option d – plasma membrane
Identify the structures that aid in bacterial motility.
(A) Cilia
(B) Flagella
(C) Fimbriae
(D) Pili
Option b – Flagella
Following are inclusion bodies found in prokaryotes, EXCEPT ( The Fundamental Unit of Life Class MCQs )
(A) Cyanophycean granule
(B) Phosphate granule
(C) Polysome
(D) Glycogen granule
Option c – Polysome
The proteins can move within the cell membrane is due to membrane’s
(A) elasticity
(B) permeability
(C) rigidity
(D) fluidity
Option d – fluidity
……. are the cytoplasmic connections between adjacent plant cells. ( The Fundamental Unit of Life Class MCQs )
(A) Mesosome
(B) Plasmodesmata
(C) Middle lamella
(D) Plasmalemma
Option b – Plasmodesmata
……. are present on the surface Rough Endoplasmic Reticulum (RER).
(A) Mitochondria
(B) Cristae
(C) Ribosomes
(D) Cisternae
Option c – Ribosomes
Identify the CORRECT function of the RER. ( The Fundamental Unit of Life Class MCQs )
(A) Protection of cells from mechanical injury
(B) Protein synthesis and secretion
(C) Steroidal hormone synthesis
(D) Lipid synthesis
Option b – Protein synthesis and secretion
Golgi apparatus is NOT found in
(A) plants
(B) bacteria
(C) eukaryotes
(D) animals
Option b – bacteria
Which of the following is present in vacuoles? ( The Fundamental Unit of Life Class MCQs )
(A) Mesosomes
(B) Excretory products
(C) Ribosomes
(D) Hydrolytic enzymes
Option b – Excretory products
Which of the following shows p presence of plastids?
(A) Animal cells
(B) Euglena
(C) Plant cells
(D) Both (B) and (C)
Option d – Both (B) and (C)
Identify the structure which shows the presence of thylakoids. ( The Fundamental Unit of Life Class MCQs )
(A) Elaioplast
(B) Mitochondria
(C) Chloroplast
(D) Mesosomes
Option c – Chloroplast
Thylakoids of different grana are connected by
(A) mesosomes
(B) matrix
(C) stroma lamellae
(D) cristae
Option c – stroma lamellae
The sedimentation coefficient of ribosomes indirectly represents ( The Fundamental Unit of Life Class MCQs )
(A) density and mass of ribosomes
(B) density and volume of ribosomes
(C) size and shape of ribosomes
(D) density and size of ribosomes
Option d – density and size of ribosomes
From the following which criterion can be used to differentiate eukaryotic and prokaryotic cells?
(A) Whether or not they have a membrane-enclosed nucleus
(B) Whether or not they have cytoplasmic membrane
(C) Comparison between structures of tRNA
(D) Whether or not they have membrane proteins
Option a – Whether or not they have a membrane-enclosed nucleus
According to the fluid-mosaic model of the membrane
(A) lipids do not have a specific arrangement
(B) the proteins are arranged in bilayer form
(C) lipids and proteins are not arranged in a specific order
(D) proteins are embedded in lipid bilayer
Option d – proteins are embedded in lipid bilayer
Which of the following is the CORRECT postulate of cell theory?
(A) All cells divide by meiosis and amitosis
(B) Cells are the basic structural units of living organisms
(C) All cells have nuclei
(D) All cells possess chloroplasts
Option b – Cells are the basic structural units of living organisms
……… confers antibiotic resistance to bacteria.
(A) Polysomes
(B) Plasmids
(C) Inclusion bodies
(D) Ribosomes
Option b – Plasmids
With reference to the animal cell, which of the following statements is correct? 1. There is no cell wall in animal cells but the cell is covered by a plasma membrane. 2. Chlorophyll is not found in animal cells. 3. Lysosome occurs in plant cells. 4. Almost in all animal cells, centrioles exist. Codes :
(a) 2 and 3 only
(b) 1, 2, and 3 only
(c) 1,2 and 4
(d) All of the above
Option c – 1,2 and 4
Consider the following statements regarding osmosis in animal cells : 1. If the water potential of the solution surrounding the cell is too high, the cell shrinks. 2. If the water potential of the solution surrounding the cell is too low, the cell swells and bursts. It is important to maintain a constant water potential inside the animal body. 4. In animal cells, water potential far exceeds the solute potential. Which of the statements given above is/are correct?
(a) 1 and 2
(b) 3 only
(c) 4 only
(d) 2 and 3
Option b – 3 only
The living content of cell is called protoplasm. It is composed of :
(a) Cytoplasm only
(b) Cytoplasm and meloplasm
(c) Nucleoplasm only
(d) Cytoplasm, nucleoplasm and other organelles
Option b – Cytoplasm and meloplasm
Consider the following statements regarding the living cell : (A) The Golgi apparatus links carbohydrates with proteins to form glycoproteins. (B) In plants, the Golgi complex synthesizes pectin. (C) The lysosomes store the hydrolysing enzymes. Which of these statement(s) is/are correct?
(a) Only (A) and (B)
(b) Only (B)
(c) Only (C)
(d) (A), (B) and (C)
Option d – (A), (B) and (C)
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.
Option b – the concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell
(a) Cell membrane, endoplasmic reticulum, vacuoles
(b) Cell wall, plasma membrane, mitochondria
(c) Cell wall, nucleus, cytoplasm
(d) Plasma membrane, cytoplasm, ribosome
Option d – Plasma membrane, cytoplasm, ribosome
Which of the following is not a true statement about chloroplasts and mitochondria?
(a) Each contains a small amount of DNA
(b) Neither are components of the endomembrane system
(c) Both are membrane less organelles
(d) Mitochondria do not synthesise all their proteins
Option c – Both are membrane less organelles
Which of the following is the correct sequence of the different phases of cell division? 1. Anaphase 2. Telophase 3. Prophase 4. Metaphase Codes :
(a) 1, 2, 3, 4
(b) 1,3,2,4
(c) 3, 1,4,2
(d) 3,4, 1, 2
Option d – 3,4, 1, 2
Consider the following statements and choose the correct code. Assertion (A) : A true nucleus is absent in E. coli and other prokaryotes. Reason (R) : An undifferentiated, unorganised fibrillar chromosome exists inside the prokaryotic cells. Codes :
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is false, but R is true.
(d) Both A and R are false.
Option a – Both A and R are true and R is the correct explanation of A
The entry of mineral ions in a plant cell during absorption is by
(a) passive absorption
(b) active absorption
(c) osmosis
(d) endocytosis
Option b – active absorption
The suicide bags of the cells are
(a) plastids
(b) mitochondria
(c) lysosomes
(d) ribosomes
Option c – lysosomes
The powerhouses of the cells are
(a) mitochondria
(b) plastids
(c) Golgi complex
(d) ribosomes
Option a – mitochondria
Vesicles are essential for the normal functioning of the Golgi apparatus because
(a) they provide energy for chemical reactions.
(b) they move proteins and lipids between different parts of the organelle.
(c) they contribute to the structural integrity of the organelle.
(d) they produce the sugars that are added to proteins.
Option b – they move proteins and lipids between different parts of the organelle
Amino acid chains built by the ribosomes then move to the
(a) Golgi apparatus
(b) lysosome
(c) endoplasmic reticulum
(d) mitochondria
Option c – endoplasmic reticulum
Simple tissues are
(a) parenchyma, xylem, and collenchyma
(b) parenchyma, collenchyma, and sclerenchyma
(c) parenchyma, xylem, and sclerenchyma
(d) parenchyma, xylem, and phloem
Option b – parenchyma, collenchyma, and sclerenchyma
The living cells providing tensile strength are
(a) parenchyma
(b) collenchyma
(c) sclerenchyma
(d) sclerotic cells
Option b – collenchyma
The energy currency of the cell is
(a) ADP
(b) ATP
(c) NADP
(d) FADP
Option b – ATP
One of these is a double membrane organelle
(a) lysosome
(b) mitochondria
(c) nucleus
(d) endoplasmic reticulum
Option b – mitochondria
The cell organelle containing the flattened membrane-bounded cisternae located near the nucleus is
(a) mitochondria
(b) Golgi
(c) centrioles
(d) nucleolus
Option b – Golgi
The SER helps in building the cell membrane. This process is called
(a) protein synthesis
(b) membrane abiogenesis
(c) membrane biogenesis
(d) glycogenosis
Option c – membrane biogenesis
Golgi apparatus is involved in the formation of
(a) lysosome
(b) vacuoles
(c) plastids
(d) mitochondria
Option a – lysosome
DNA is a component of
(a) mitochondria
(b) chloroplast
(c) cytoplasm
(d) (a) and (b) both
Option d – (a) and (b) both
The plasma membrane is
(a) permeable
(b) impermeable
(c) selectively permeable
(d) both (a) and (b)
Option c – selectively permeable
Nuclear material without cover is found in
(a) mycoplasma and green algae
(b) bacteria and fungi
(c) bacteria and blue-green algae
(d) none of the above
Option c – bacteria and blue-green algae
The word ‘prokaryote’ means a cell
(a) with many nuclei
(b) with one nucleus
(c) with diffused nucleus
(d) without chloroplast
Option c – with diffused nucleus
Minute structures on bacterial cells are called
(a) hair
(b) cilia
(c) flagella
(d) pili
Option d – pili
Cell theory was proposed by
(a) Schleiden and Schwann
(b) Robert Brown
(c) Leeuwenhock
(d) Purkinje
Option a – Schleiden and Schwann
The undefined nuclear region in a bacteria is
(a) nucleoid
(b) nucleus
(c) chromosome
(d) nucleolus
Option a – nucleoid
The nucleus plays a crucial part in
(a) metabolism
(b) cellular reproduction
(c) lipid synthesis
(d) protein synthesis
Option b – cellular reproduction
Which of the following is not present in prokaryotes?
(a) Ribosomes
(b) Cell wall
(c) Plasma membrane
(d) Nuclear membrane
Option d – Nuclear membrane
The chemical nature of carrier molecules facilitating transport across the plasma membrane is
(a) starchy
(b) sugary
(c) proteinaceous
(d) fatty acidic
Option c – proteinaceous
ER remains associated with
(a) dictyosomes
(b) mitochondria
(c) karyotheca
(d) chloroplast
Option c – karyotheca
The vacuole is surrounded by
(a) plasmalemma
(b) cell wall
(c) tonoplast
(d) plasmodesmata
Option c – tonoplast
The organisms that lack membranes are
(a) Viruses
(b) Bacteria
(c) Protozoans
(d) Fungi
Option a – Viruses
The organelle attached to the ER is
(a) ribosomes
(b) lysosomes
(c) Golgi bodies
(d) proteins
Option a – ribosomes
Osmosis is the process of movement of water molecules from their
(a) higher concentration to their lower concentration through a cell wall.
(b) lower concentration to its higher concentration through a fully permeable membrane.
(c) higher concentration to its lower concentration through a fully permeable membrane.
(d) higher concentration to its lower concentration through a semi-permeable membrane.
Option d – higher concentration to its lower concentration through a semi-permeable membrane
The cell was first discovered by
(a) Robert Hooke
(b) Leeuwenhock
(c) Purkinje
(d) Virchow
Option a – Robert Hooke
According to the fluid mosaic model, the plasma membrane is composed of
(a) phospholipids, extrinsic and intrinsic proteins
(b) phospholipids and oligosaccharides
(c) phospholipids and hemicellulose
(d) phospholipids and integral glycoproteins
Option a – phospholipids, extrinsic and intrinsic proteins
The presence of ……….. organelle is only revealed by electron microscope.
(a) chloroplast
(b) mitochondria
(c) Golgi bodies
(d) lysosome
Option d – lysosome
One of these is the smallest in size
(a) Ribosome
(b) Lysosome
(c) Mitochondria
(d) Chloroplast
Option a – Ribosome
Golgi bodies help in
(a) excretion of steroids
(b) storage and secretion
(c) translation
(d) transcription
Option b – storage and secretion
The movement of materials to different parts of the cytoplasm and nucleus is generally carried out by
(a) Ribosomes
(b) Mitochondria
(c) Lysosomes
(d) Endoplasmic reticulum.
Option d – Endoplasmic reticulum
In mitochondria, ATP-synthesizing chemical reactions take place in the
(a) Outer membrane.
(b) Matrix.
(c) Inner membrane.
(d) DNA of mitochondria.
Option c – Inner membrane
The cell wall is not present in cells of
(a) Bacteria
(b) Plants
(c) Fungi
(d) Humans
Option d – Humans
Which cell organelles have their own DNA and Ribosomes?
(a) Golgi body and Endoplasmic Reticulum
(b) Mitochondria and Plastids
(c) Lysosome and Golgi body
(d) Vacuole and Plastids
Option b – Mitochondria and Plastids
Which of the following is the cellular respiratory center?
(a) Nucleus
(b) Mitochondria
(c) Ribosome
(d) Golgi body
Option b – Mitochondria
Which one of the following cell organelles contains DNA?
(a) Golgi apparatus
(b) Mitochondrion
(c) Lysosome
(d) Endoplasmic reticulum
Option b – Mitochondrion
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