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Biology 9 Chapter 4 - Cells and Tissues-8
1.
Which of the following helps in the formation of the spindle fibers during cell division?
a) Chloroplast
b) Centrosomes
c) ER
d) Lysosomes
2.
Which of the following is fluid filled single membrane bounded organelles?
a) Plastids
b) Ribosome
c) Centrioles
d) Vacuoles
3.
How many types of cells are found in human body?
a) 300
b) 425
c) 400
d) 200
4.
Which of the following is deposited in the extracellular spaces of bone cells to make bone tough?
a) Calcium
b) Nitrogen
c) Phosphorus
d) Zinc
5.
Which of the following is the diameter of red blood cells?
a) 12 µm
b) 9 µm
c) 15 µm
d) 8 µm
6.
Gas exchanges in lungs and gills occurs by which process?
a) Diffusion
b) None of these
c) Active transport
d) Both a+b
7.
A hypertonic solution has relatively which concentration of solutes?
a) Equal
b) All of these
c) More
d) Less
8.
A hypotonic solution has relatively which concentration of solutes?
a) Same
b) None of these
c) More
d) Less
9.
Which of the following is called as shrinking of cytoplasm?
a) Turgor pressure
b) cristanae
c) Plasmolysis
d) Cistae
10.
The outward pressure on cell wall exerted by by internal water is called?
a) Liquid pressure
b) Fluid pressure
c) Turgor pressure
d) Atmospheric pressure
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