PrepBharat

1. Chlorophyll pigments are present in
a) Thylakoid
b) Stroma
c) Outer membrane
d) Inner membrane

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2. Ribosomes are the granular structure first observed under the electron microscope as dense particle by which scientist
a) Robert Brown (1831)
b) George Palade (1953)
c) Camillo Golgi (1898)
d) Singer and Nicolson (1972)

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3. The types of ribosome present in eukaryote cell is
a) 70S
b) 80S
c) Both (a) and (b)
d) None of these

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4. An elaborate network of filamentous proteinaceous structures present in the cytoplasm is collectively known as
a) Cilia
b) Flagella
c) Cytoskeleton
d) ER

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5. Cytoskeleton helps in
a) Mechanical support to cell
b) Providing mobility to cell
c) Maintenance of shape of cell
d) All of these

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6. The central part of the proximal region of the centriole is also proteinaceous and is called
a) Spokes
b) Doublet
c) Hub
d) Linkers

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7. Find out the incorrect statement:
a) Centrioles forms basal bodies of cilia or flagella.
b) Centriole gives rise to spindle fibres at the time of cell division in animal cell.
c) Centrosome is an organelle usually containing two cylindrical structures called centrioles.
d) Peripheral fibril of centriole is doublet.

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8. Identify A, B, C, D, E and F given in the figure.

a) A–Interdoublet bridge, B–Peripheral microtubules (doublets), C–Central microtubule, D– Plasma membrane, E–Central bridge, F–Radial spoke
b) A–Central sheath, B–Radial spoke, C–Interdoublet bridge, D–Central microtubule, E– Plasma membrane, F–Peripheral microtubules (doublets)
c) A–Central sheath, B–Plasma membrane, C–Peripheral microtubules (doublets), D–Radial spoke, E–Central microtubule, F–Interdoublet bridge
d) A–Plasma membrane, B–Radial spoke, C–Peripheral microtubules (doublets), D–Central sheath, E–Central microtubule, F–Interdoublet bridge

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9. Select the incorrect statement:
a) Cilia and flagella are hair-like outgrowths of the cell membrane.
b) Cilia causes the movement of either the cell or the surrounding medium.
c) Bacterial flagella are structurally similar to eukaryotic flagella.
d) Flagella is responsible for cell movement.

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10. Which of the following is true about the internal structure of axoneme?
a) Central sheath is connected to one of the tubule of each peripheral doublets by a radial spoke
b) Axoneme is not covered by plasma membrane at all.
c) Then are only and radial spokes are found.
d) Peripheral doublets are not connected with each other.

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