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Neet Biology Cell Structure And Organelle Mcq
Quiz 20
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Q.1
on Q392) Find out the polymorphic organelle:
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a) Lysosome.
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b) Ribosome.
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c) Sphaerosomes.
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d) Desmosomes.
Explanation
Answer:(a)
Q.2
on Q393) Zone of exclusion is related to:
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a) Cytoplasm surrounding vacuoles.
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b) Cytoplasm surrounding Golgi bodies.
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c) Cytoplasm surrounding lysosomes.
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d) Centrospheric fluid around Diplosome.
Explanation
The Golgi apparatus of plant cells consists of about 10-20 individual subunits that found scattered throughout the cytoplasm. Each individual subunit is called a dictyosome or Golgi body or Golgi stack. The zone of clear cytoplasm surrounding a Golgi body is called zone of exclusion Answer:(b)
Q.3
on Q394) Given below the following statements: (i) Pigments like chlorophyll are found in thylakoid. (ii) Cell membrane is common structure between prokaryotic and eukaryotic cell. (iii) Zone of exclusion is found around centrioles, mitochondria and golgi bodies. (iv) Packaging of material for transportation is function of golgi body. (v) 9 + 0 arrangement of filaments is not found in centrioles and basal body. (vi) Acrosome of sperm is formed by golgi body. Select the correct statements:
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a) (i), (ii), (iv), (v) and (vi).
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b) (ii), (iv) and (v).
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c) (i), (ii), (iv) and (vi).
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d) (ii), (iii) and (v).
Explanation
Answer:(c)
Q.4
on Q395) The cis and trans faces of the Golgi Apparatus are:
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a) Similar but not interconnected.
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b) Similar and interconnected.
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c) Entirely different but interconnected.
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d) Entirely different and not interconnected.
Explanation
Answer:(c)
Q.5
on Q396) Carotenoids pigments are found in: I. Chloroplasts. II. Chromoplasts. III. Leucoplasts
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a) Only I.
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b) Only I and II.
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c) Only II.
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d) I, II and III.
Explanation
Answer:(b)
Q.6
on Q397) Select the correct matching in the following pairs
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a) Smooth ER-Oxidation of phospholipids
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b) Smooth ER-Synthesis of lipids
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c) Rough ER-Synthesis of glycogen
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d) Rough ER-Oxidation of fatty acids
Explanation
Answer:(b)
Q.7
on Q398) How many of the following structures are synthesised by microtubules? Centrioles, basal body, cilia, flagella, spindle fibres
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a) 5.
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b) 4.
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c) 3.
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d) 2.
Explanation
Microtubules form a framework for structures such as the spindle apparatus that appears during cell division, or the whiplike organelles known as cilia and flagella. Centrioles are an organelle inside animal cells that are made of microtubules Basal bodies are microtubule-based organelles that assemble cilia and flagella, which are critical for motility and sensory functions in all major eukaryotic lineages Answer:(a)
Q.8
on Q399) It actively synthesized r-RNA.
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a) Nucleoplasm
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b) Nucleolus
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c) Nucleus
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d) All of the above
Explanation
Molecules of rRNA are synthesized in a specialized region of the cell nucleus called the nucleolus Answer:(b)
Q.9
on Q400) Who mention that the presence of a cell wall is an unique character of the plant cell?
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a) Schwann
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b) Virchow
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c) Schleiden
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d) Robert Brown
Explanation
Schleiden also concluded on plant studies, i.e., the presence of cell wall is a unique character of plant cells Answer:(a)
Q.10
on Q401) What is the length of mitochondrion?
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a) 1.0-4.1 µm
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b) 0.2-1.0 µm
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c) 2.5-2.8 µm
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d) 1.9-6.4 µm
Explanation
Most mitochondria are ovoid bodies having a diameter between 0.5 and 1.0 µm and a length up to 7 µm Answer:(d)
Q.11
on Q402) (A) Mitochondria, Chloroplast possesses circular DNA (R)Mitochondria are self replicating organelles.
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a) Assertion (A) and Reason (R) both are true and reason (B) is correct explanation of the assertion A.
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b) Assertion (A) and Reason (R) both are true but reason B is not a correct explanation of the assertion (A)
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c) Assertion (A) is true but Reason (B) is false.
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d) Assertion (A) is false but Reason B is true.
Explanation
Answer:(b)
Q.12
on Q403) Which of the following is not a true subcellular organelle?
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a) Peroxisome.
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b) Ribosome.
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c) Chloroplast.
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d) Lysosome.
Explanation
Answer:(b)
Q.13
on Q404) Prokaryotic cells have something unique in the form of:
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a) Inclusion bodies.
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b) Plasmids.
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c) Cell wall.
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d) 70 S ribosomes.
Explanation
Answer:(a)
Q.14
on Q405) In germinating seeds fatty acids are degraded exclusively in the:
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a) Proplastids.
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b) Glyoxysomes.
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c) Peroxisomes.
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d) Mitochondria.
Explanation
Answer:(b)
Q.15
on Q406) Which one is true for the cell membrane?
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a) The ratio of lipids and proteins is fixed in membranes.
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b) The amount of carbohydrates is smaller than other biomolecules.
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c) In human erythrocytes amount of protein is more than that of lipids.
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d) All of the above.
Explanation
Answer:(d)
Q.16
on Q407) The membrane of the erythrocytes has approximately ___% of proteins and ___% lipids.
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a) 42, 50.
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b) 52, 40.
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c) 50, 50.
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d) 60, 40.
Explanation
Answer:(b)
Q.17
on Q408) Who proposed that, "All cells arise from pre existing cells"?
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a) Schleiden.
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b) Brown.
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c) Haeckel.
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d) Virchow.
Explanation
Answer:(d)
Q.18
on Q409) Which of the following statements is incorrect with reference to lysosomes?
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a) They are filled with acid Hydrolase and other enzymes.
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b) They are monomorphic and uniform in structure and function.
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c) They are membrane bound vesicular structures.
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d) They can digest proteins, nucleic acids, lipids and polysaccharides.
Explanation
Answer:(b)
Q.19
on Q410) How does the membrane of Psycrophiles (those which survive at low temperatures) compare with that of Thermophiles (those which survive at high temperatures)?
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a) Both Psycrophiles and thermophiles contain high quantity of unsaturated fatty acids in their membrane.
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b) Psycrophiles contains large quantity of unsaturated fatty acids while thermophiles contain large quantity of saturated fatty acids.
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c) Psycrophiles contains large quantity of saturated fatty acids while thermophiles contain large quantity of unsaturated fatty acids.
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d) Both Psycrophiles and thermophiles contain high quantity of saturated fatty acids in their membrane.
Explanation
Answer:(b)
Q.20
on Q411) Assertion: Metacentric chromosome appears V shaped. Reason: In these chromosomes, the centromere occurs in the centre forming two equal arms.
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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
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b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
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c) Assertion is true but Reason is false.
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d) Both Assertion and Reason are false.
Explanation
Answer:(a)
Q.21
on Q412) Select the mismatch.
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a) Gas vacuoles - Green bacteria Cells.
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b) Large central vacuoles - Animal cells.
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c) Protists - Eukaryotes.
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d) Methanogens - Prokaryotes.
Explanation
Answer:(b)
Q.22
on Q413) The solid linear cytoskeletal elements having a diameter of 6nm and made up of a single type of monomer are known as:
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a) Microtubules.
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b) Microfilaments.
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c) Intermediate filaments.
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d) Lamins.
Explanation
Answer:(b)
Q.23
on Q414) In each chromosome centromere possessing disc shaped structure is
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a) Satellite
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b) Kinetochore
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c) Long arm
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d) Short arm
Explanation
Answer:(b)
Q.24
on Q415) Each granum possesses how many thylakoids?
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a) 02-100
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b) 90-93
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c) 19-89
0%
d) 19-38
Explanation
Answer:(a)
Q.25
on Q416) Select the Correct option from Cloumn-I and Column-II
Column I
Column II
P Micro filaments
i Glycocalyx
Q Micro tubules
ii Actin
R Flagella
iii Tubulin
S Outer most layer of bacteria
iv Flagellin
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a) (P - ii) (Q - iii) (R - iv) (S - i)
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b) (P - ii) (Q - ii) (R - iv) (S - i)
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c) (P - ii) (Q - iii) (R - i) (S - iii)
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d) (P - iv) (Q - i) (R - iii) (S - ii)
Explanation
Microfilaments, also called actin filaments, are filaments in the cytoplasm of eukaryotic cells that form part of the cytoskeleton and are primarily composed of polymers of actin (P-ii) Microtubules are polymers of tubulin that form part of the cytoskeleton and provide structure and shape to eukaryotic cells.(Q-iii) Flagellin is a subunit protein of the flagellum (flagella), a whip-like appendage that enables bacterial motility. (R - iv) The glycocalyx is a carbohydrate-enriched coating that covers the outside of many eukaryotic cells and prokaryotic cells, particularly bacteria (S-) Answer:(a)
Q.26
on Q417) Vacuole in a plant cell:
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a) Lacks membrane and contains air.
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b) Lacks membrane and contains water and excretory products.
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c) Is membrane bounded and contains storage proteins and lipids.
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d) Is membrane bounded and contains water and excretory substances.
Explanation
Answer:(d)
Q.27
on Q420) Match column-I with column-II and choose the correct option.
Column I
Column II
a. Tonoplast
Contain digestive enzyme
b. Contractile vacuole
Store metabolic gases
c. Food vacuole
Excretion
d. Air vacuole
Transport of ions in plants
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a) a -4 ; b-3 ; c-1 ; d-2
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b) a -2 ; b-3 ; c-4 ; d-1
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c) a -4 ; b-2 ; c-3 ; d-1
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d) a -1 ; b-3 ; c-2 ; d-4
Explanation
Answer:(a)
Q.28
on Q421) Identify the expansion of SAT:
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a) Sine Acid Thymine.
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b) Sine Acid Thymonucleinico.
0%
c) Sine Acetic Thymine.
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d) Sine Acetic Thymonucleinico.
Explanation
Answer:(b)
Q.29
on Q422) Red colour of ripened tomato and chilly is due to:
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a) Lycopene in chloroplast.
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b) Lycopene in chromoplasts.
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c) Anthocyanins in leucoplasts.
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d) Anthocyanins in chloroplasts.
Explanation
Answer:(b)
Q.30
on Q423) Find out the incorrect statement about mitochondria:
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a) Reproduce by binary fission.
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b) Largest cell organelle in animal cell.
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c) Mitochondrial matrix is the site of glycolysis and Kreb's cycle.
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d) Mitochondria are stained by Janus green B.
Explanation
Answer:(c)
Q.31
on Q424) The organelle of the endomembrane system associated with the sorting of lipids and proteins for various cellular functions are:
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a) Rough endoplasmic reticulum.
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b) Lysosomes.
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c) Vesicles.
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d) Golgi complex.
Explanation
Answer:(d)
Q.32
on Q425) Which of the following is a wrong explanation regarding the scientific terms?
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a) Nucleolus - Dense cytoplasm of nucleus.
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b) Cristae - Extensive infoldings to the outer membranes of mitochondria.
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c) Granum - Stacks of closely packed thylakoids.
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d) ATP synthase - Stalked particles on the inner membrane of mitochondria.
Explanation
Answer:(b)
Q.33
on Q426) Unless specifically stained by a vital stain like Janus Green, which of the following will not be visible under a microscope?
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a) Rough endoplasmic reticulum.
0%
b) Smooth endoplasmic reticulum
0%
c) Golgi apparatus.
0%
d) Mitochondria.
Explanation
Answer:(d)
Q.34
on Q427) Which one of the following is not an inclusion body found in prokaryotes?
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a) Phosphate granule.
0%
b) Cyanophycean granule.
0%
c) Glycogen granule.
0%
d) Polysome.
Explanation
Answer:(d)
Q.35
on Q428) Which one of the following is correct for the transmembrane proteins in lipid bilayer of plasma membrane?
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a) They are absent in animal cells.
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b) They act as channel proteins.
0%
c) They are absent in plant cells.
0%
d) They are only externally located.
Explanation
Answer:(b)
Q.36
on Q429) What is produce when vesicle are separated from Golgi body?
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c) Ribosomes
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d) Chloroplast
0%
a) Lysosome
0%
b) Vacuoles
Explanation
Answer:(a)
Q.37
on Q430) (A)The living organism possesses unicellular or multicellular structure. (R)The Life span of living organisms start with zygot.
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a) Assertion (A) and Reason (R) both are true and reason (B) is correct explanation of the assertion A.
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b) Assertion (A) and Reason (R) both are true but reason B is not a correct explanation of the assertion (A)
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c) Assertion (A) is true but Reason (B) is false.
0%
d) Assertion (A) is false but Reason B is true.
Explanation
Answer:(a)
Q.38
on Q431) Cell is the fundamental structural and functional unit of all living organisms because:
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a) Anything less than a complete structure of a cell does not ensure independent living.
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b) The metabolic reactions can only occur inside a living cell.
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c) Nucleic acids present in the cells ensure living state.
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d) The membrane bound organelles cause differentiation for proper functioning.
Explanation
Answer:(a)
Q.39
on Q432) It is the Smallest Cell.
0%
a) Bacteria
0%
b) Mycoplasma
0%
c) Yeast
0%
d) Blue green algae
Explanation
Answer:(b)
Q.40
on Q433) This organelle possesses 9+0 structure.
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a) Centriole
0%
b) Cilia
0%
c) Flagella
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d) All of the above
Explanation
Answer:(a)
Q.41
on Q434) Like zygote any cell of the body is capable of producing a new individual is known as...
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a) Totipotency
0%
b) Differentiation
0%
c) Growth
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d) Reproduction
Explanation
Answer:(a)
Q.42
on Q435) Plastidome/cp DNA refers to:
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a) Double stranded DNA of mitochondria.
0%
b) Double stranded DNA of plasmid.
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c) Double stranded DNA of chloroplast.
0%
d) Double stranded DNA synthesised by retroviruses.
Explanation
Answer:(c)
Q.43
on Q436) The lysosomal stabilizer is:
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a) Vitamin K.
0%
b) Vitamin A.
0%
c) Cortisone.
0%
d) Progesterone.
Explanation
Lysosomes are spherical structures bounded by a single unit membrane within which dense granular enzymatic components are found. Though hydrolysing enzymes are found within the lysosomes, its own membrane is not digested because the membrane is highly modified and resistant to such enzymes; more over the enzymes are rendered inactive by electrostatic binding forces. However lysosomal membranes are sensitive to many labilizers and stabilizers. Vitamins like A, B, K and hormones like progesterone, B-esterdiol and some metal ions like Ag2+, Hg2 +, Cu2 labilize the membranes and allow the enzymes to diffuse out. But cholesterol, cortisones, etc stabilize the membranes. Thus intacellular conditions control and regulate the release of the lysosomal enzymes into cellular fluid. Answer:(c)
Q.44
on Q437) Assertion: Phospholipid is an Amphipathic molecule. Reason: It contains both hydrophilic and hydrophobic parts.
0%
a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
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b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
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c) Assertion is true but Reason is false.
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d) Both Assertion and Reason are false.
Explanation
Answer:(a)
Q.45
on Q438) Which of the following is false regarding capsule form of glycocalyx? (i) Thick. (ii) Rigid. (iii) Firmly attached to the cell wall. (iv) Loosely attached to the cell wall. (iv) Protect from host immune system. (vii) Protect from desiccation.
0%
a) Only (iv) and (v).
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b) Only (iii) and (v).
0%
c) Only (iv) and (vi).
0%
d) Only (iii) and (iv).
Explanation
Answer:(c)
Q.46
on Q439) Regarding plant wall, which layer provides mechanical strength to the cell?
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a) Primary wall.
0%
b) Secondary wall.
0%
c) Tertiary wall.
0%
d) All of these.
Explanation
Answer:(b)
Q.47
on Q440) Ribosomes are present in how many types of semi autonomous organelles in animal and plant cells respectively?
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a) One, two.
0%
b) Two, three.
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c) Three, four.
0%
d) Two, one.
Explanation
Answer:(a)
Q.48
on Q441) What is true about ribosomes?
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a) The prokaryotic ribosomes are 80 S, where S stands for sedimentation coefficient.
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b) These are composed of ribonucleic acid and proteins.
0%
c) These are found only in eukaryotic cells.
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d) These are self-splicing introns of some RNAs.
Explanation
Answer:(b)
Q.49
on Q442) The presence of cholesterol in the plasma membranes of some animals.
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a) Enables the membrane to stay fluid more easily when cell temperature drops.
0%
b) Enables the animal to remove hydrogen atoms from saturated phospholipids.
0%
c) Enables the animal to add hydrogen atoms to unsaturated phospholipids.
0%
d) Makes the membrane less flexible, allowing it to sustain greater pressure from within the cell.
Explanation
Answer:(a)
Q.50
on Q443) Identify the cell organelle, which are small, single membrane, they absorb molecular O2 and take part in oxidation other than those involved in respiration is:
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a) Mitochondria.
0%
b) Microsomes.
0%
c) Lysosomes.
0%
d) Microbodies.
Explanation
Answer:(d)
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