NEET Biology Cell The Unit of Life MCQs Set A

Question: Robert Hooke discovered the_______ of a cell

• a) Cell wall
• b) Nucleus
• c) Cell wall
• d) Cytoplasm

Answer: Cell wall

Question: Cell theory was given by

• a) Schleiden and Schwann
• b) Anton van Leeuwenhoek
• c) Robert Hooke
• d) Robert Brown and Rudolf Virchow

Answer: Schleiden and Schwann

Question: The statement Omnis cellula e cellula, which means all cells arise from pre-existing cells was given by

• a) Rudolf Virchow
• b) Robert Brown
• c) Schleiden
• d) Anton Von Leeuwenhoek

Answer: Rudolf Virchow

Question: Which of the following cell organelles is non-membrane bound and found in both prokaryotes and eukaryotes

• a) Ribosomes
• b) Centrioles
• c) Mitochondria
• d) Lysosomes

Answer: Ribosomes

Question: Which of the following structure is present only in prokaryotic cell?

• a) Plasmid
• b) Nucleus
• c) Mitochondria
• d) Ribosomes

Answer:  Plasmid

Question:

• a) Mycoplasma
• b) Bacteria
• c) Cyanobacteria
• d) Ostrich egg

Answer: Mycoplasma

Question: The genomic DNA of a bacterium is

• a) Circular
• b) Linear
• c) Segmented
• d) Rod shaped

Answer: Circular

Question: Which of the following component provides sticky character to the bacterial cell?

• a) Glycocalyx
• b) Plasma membrane
• c) Nuclear membrane
• d) Cell wall

Answer: Glycocalyx

Question: The subunits of ribosomes of a prokaryotic cell are

• a) 50S and 30S
• b) 30S and 60S
• c) 20S and 90S
• d) 60S and 40S

Answer: 50S and 30S

Question: The genetic material of a prokaryotic cell is known as

• a) Nucleoid
• b) Mesosome
• c) Nucleus
• d) Centrosome

Answer:  Nucleoid

Question: Which of the following cell organelle is known as protein factory?

• a) Ribosome
• b) Nucleolus
• c) Mitochondria
• d) Lysosome

Answer: Ribosome

Question: Which type of vacuoles provide buoyancy to bacteria?

• a) Gas vacuoles
• b) Food vacuoles
• c) Contractile vacuoles
• d) Sap vacuoles

Answer: Gas vacuoles

Question: Which of the following is not a structure of prokaryotic flagella?

• a) Centriole
• b) Hook
• c) Basal body
• d) Filament

Answer: Centriole

Question:  The ______ are small bristle like fibres sprouting out of the bacterial cell.

• a) Fimbriae
• b) Cilia
• c) Mesosomes
• d) Pili

Answer: Fimbriae

Question: The animal cell is different from a plant cell in having

• a) Centrosomes
• b) Golgi apparatus
• c) Nucleus
• d) Ribosomes

Answer: Centrosomes

Question: The model given by Singer and Nicolson in_____ was______ for plasma membrane.

• a) 1972, fluid mosaic model
• b) 1952, bilayer model
• c) 1992, bilayer model
• d) 1982, fluid mosaic model

Answer: 1972, fluid mosaic model

Question: Gas vacuoles are found in

• a) More than one option is correct
• b) Blue green algae
• c) Green and purple bacteria
• d) Bacillus

Answer: More than one option is correct

Question: Which of the following statement is incorrect?

• a) Secondary wall is formed on the outer side of the cell
• b) Middle lamella is chiefly made up of calcium and magnesium pectate
• c) Plasmodesmata are cytoplasmic bridges that connect the neighbouring plant cells
• d) Secondary cell wall is found in harder woody parts of a plant

Answer:  Secondary wall is formed on the outer side of the cell

Question: Which of the following cell organelles is not considered as a part of an endomembrane system?

• a) Mitochondria
• b)  ER
• c) Golgi complex
• d) Lysosomes

Answer: Mitochondria

More Questions.......................................

Question: A cell organelle ‘X’ is divided into two types on the basis of a cell organelle ‘Y’, that helps in the protein synthesis. Identify ‘X’ and ‘Y’ respectively

• a) ER and ribosome
• b) Golgi complex and ribosome
• c) Lysosome and ER
• d) ER and mitochondria

Answer: ER and ribosome

Question: The surface of RER has

• a) Ribosomes
• b) Lysosomes
• c) Golgi complex
• d) Plastids

Answer: Ribosomes

Question: Which of the following cell organelle is responsible for the synthesis of steroids and lipids?

• a) SER
• b) RER
• c) Mitochondrion
• d) Ribosome

Answer: SER

Question:  Large number of RER are found in the cells actively involved in

• a) Protein synthesis
• b) Starch synthesis
• c) Steroidogenesis
• d) Lipid synthesis

Answer: Protein synthesis

Question: Which of the following statement is incorrect w.r.t. Golgi apparatus?

• a) It is non-membrane bound organelle
• b) Golgi apparatus has two faces – cis and trans
• c) Cisternae resemble with SER
• d) It is composed of flattened sacs called cisternae

Answer: It is non-membrane bound organelle

Question: Which of the following is common to both ER and Golgi complex?

• a) Both have cisternae
• b) Both are semi-autonomous organelles
• c) Both are double membrane bound
• d) Both contain their own DNA

Answer: Both have cisternae

Question: A number of proteins synthesised by ribosomes present on the ER are transferred to

• a) Golgi apparatus
• b) Plastids
• c) Vacuoles
• d) Lysosomes

Answer: Golgi apparatus

Question: Which of the following statement is incorrect w.r.t. lysosomes?

• a) The enzymes of lysosomes work in basic condition
• b) The enzymes of lysosomes are synthesised by RER
• c) They are distributed in the cytoplasm of the cell
• d) Lysosomes are simple tiny spherical sac-like structures

Answer: The enzymes of lysosomes work in basic condition

Question: Which of the following cell organelle is involved in the synthesis of the cell organelle that contains hydrolytic enzymes?

• a) Golgi apparatus
• b) Mitochondrion
• c) Nucleus
• d) Plastids

Answer: Golgi apparatus

Question: Which of the following vacuoles help in osmoregulation in Amoeba?

• a) Contractile vacuoles
• b) Sap vacuoles
• c) Food vacuoles
• d) Gas vacuoles

Answer: Contractile vacuoles

Question: The vacuoles which help in the digestion of food particles engulfed by protists are

• a) Food vacuoles
• b) Sap vacuoles
• c) Gas vacuoles
• d) Contractile vacuoles

Answer: Food vacuoles

Question: Which of the following stain is used to observe mitochondria?

• a) Janus green
• b) Gram stain
• c) Safranin
• d) Methylene blue

Answer: Janus green

Question: Which of the following cell organelle is known as powerhouse of the cell?

• a) Mitochondrion
• b) Lysosome
• c) ER
• d) Golgi apparatus

Answer: Mitochondrion

Question: The inner membrane of mitochondria forms a number of infoldings called

• a) Cristae
• b) Cisternae
• c) Microtubules
• d) Mesosomes

Answer: Cristae

Question: The type of ribosomes found inside the mitochondria is

• a) 70S
• b) 80S
• c) 60S
• d) 90S

Answer: 70S

Question: The plastids which store proteins are

• a) Aleuroplasts
• b) Elaioplasts
• c) Amyloplasts
• d) Chromoplasts

Answer: Aleuroplasts

Question: Which of the following plastid is coloured and contains carotenoids?

• a) Chromoplast
• b) Amyloplast
• c) Elaioplast
• d) Aleuroplast

Answer: Chromoplast

Question: Which type of plastid contains chlorophyll and responsible for photosynthesis?

• a) Chloroplast
• b) Chromoplast
• c) Aleuroplast
• d) Elaioplast

Answer: Chloroplast

Question: The orange colour of carrot root is due to the presence of

• a) Chromoplast
• b) Amyloplast
• c) Elaioplast
• d) Aleuroplast

Answer: Chromoplast

Question: Which of the following statement is incorrect w.r.t. ribosomes?

• a) They are made up of RNA only
• b) The type of ribosomes of prokaryotes is 70S
• c) Ribosomes were discovered by George Palade
• d) Ribosomes are also known as protein factories

Answer: They are made up of RNA only

Question: Centrosome is an organelle containing two cylindrical structures called

• a) Centrioles
• b) Thylakoids
• c) Cisternae
• d) Cristae

Answer: Centrioles

Question: The nucleus was discovered by ______ in _____.

• a) Robert Brown, 1831
• b) Robert Hooke, 1931
• c) Anton van Leeuwenhoek, 1906
• d) Schleiden, 1981

Answer: Robert Brown, 1831

Question: What is common in mitochondria, chloroplast and nucleus?

• a) They are double membrane bound organelles
• b) They are included in endomembrane system
• c) They are single membrane bound organelles
• d) They have 80S ribosomes

Answer: They are double membrane bound organelles

Question: The structure present inside the nucleus responsible for ribosomal unit formation is

• a) Nucleolus
• b) DNA
• c) Nucleoplasm
• d) Mesosomes

Answer: Nucleolus

Question: Chromatin found in nucleus was discovered by

• a) Flemming
• b) Schleiden
• c) Schwann
• d) Robert Brown

Answer: Flemming

Question: Chromatin is essentially composed of

• a) DNA and histones
• b) RNA only
• c) RNA and ribosomes
• d) DNA only

Answer: DNA and histones

Question: The chromatids of a chromosome are held together at a point called

• a) Centromere
• b) Satellite
• c) Centriole
• d) Centrosome

Answer: Centromere

Question: An elaborate network of filamentous proteinaceous structure present in the cytoplasm which helps in the maintenance of cell shape is called

• a) Cytoskeleton
• b) Plasmalemma
• c) Endoplasmic reticulum
• d) Thylakoid

Answer:  Cytoskeleton

Question: Select the incorrect statement w.r.t. mitochondria

• a) The cristae decrease the surface area
• b) They divide by fission
• c) The matrix possesses single circular DNA
• d) They produce cellular energy in the form of ATP

Answer: The cristae decrease the surface area

Question: The chromosomes having centromere at terminal end are called

• a) Telocentric
• b) Acrocentric
• c) Metacentric
• d) Sub-metacentric

Answer: Telocentric

Question: Satellite chromosomes have

• a) Both primary and secondary constriction
• b) Secondary constriction only
• c) Primary constriction only
• d) Tertiary constriction only

Answer: Both primary and secondary constriction

Question:  Microbodies are

• a) Membrane bound minute vesicles
• b) Non-membrane bound organelles
• c) Present only in plants
• d) Present only in animals

Answer: Membrane bound minute vesicles

Question:

• a) a(ii), b(i), c(iv), d(iii)
• b) a(ii), b(i), c(iii), d(iv)
• c) a(iii), b(i), c(iv), d(ii)
• d) a(i), b(ii), c(iv), d(iii)

Answer: a(ii), b(i), c(iv), d(iii)

Question:  Which of the following organelles show polymorphism?

• a) Lysosome
• b) Golgi apparatus
• c) Mitochondria
• d) Chloroplast

Answer: Lysosome

Question: Which structure is/are considered as semi-autonomous organelle?

• a) Mitochondria and chloroplast
• b) Ribosome
• c) Golgi body
• d) Mitochondria only

Answer: Mitochondria and chloroplast

Question: Animals cannot carry out gluconeogenesis as they do not possess

• a) Glyoxylate enzyme
• b) Lysosome
• c) Glycolate enzyme
• d) Glycolysis enzyme

Answer: Glyoxylate enzyme

Question: Diagrammatic representation of karyotype of a species is called

• a) Idiogram
• b) Cladogram
• c) Dendogram
• d) More than one option is correct

Answer: Idiogram

Question: Incorrect statement in relation to nucleolus is

• a) It is separated from nucleoplasm by nuclear envelope
• b) It is a spherical structure
• c) It is the site of rRNA synthesis
• d) They are larger and more numerous in cells actively engaged in protein synthesis

Answer: It is separated from nucleoplasm by nuclear envelope

Question: Microfilaments perform all the following functions, except

• a) Help in cell plate method during cell division
• b) Provide support to plasma membrane
• c) Involved in cyclosis
• d) Help in pseudopodia formation

Answer:  Help in cell plate method during cell division