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Earn 100
The study related to the structure and function of a cell is called
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Important Questions on The Unit of Life
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Mitochondria and chloroplast are:
(i) Semi - autonomous organelles
(ii) Formed by the division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery
Which one of the following option is correct?
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I) In plasma membrane, hydrophilic polar heads of lipids arrange towards the outside and the hydrophobic tail towards the inner side
II) In the plasma membrane, peripheral proteins lie on the surface of the membrane while the integrated proteins are not buried in the membrane
III) Neutral solutes may move across the membrane by the process of simple diffusion against the concentration gradient
IV) Polar molecules can pass through the non-polar lipid bilayer and do not require a carrier protein
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| Column I | Column II | ||
| A | Thylakoids | (i) | Disc-shaped sacs in Golgi apparatus |
| B | Cristae | (ii) | Condensed structure of DNA |
| C | Cisternae | (iii) | Flat membranous sacs in stroma |
| D | Chromatin | (iv) | Infoldings in mitochondria |
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HARD
HARD
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Schleiden ____ observed that all plants are composed of different kind of cells. Schwann ____ studied animal cells and reported that plants have ____ and all cells had ____ , and Virchow explained that cells divided and formed new cells from ____. This constitutes ____.
A) Cell theory
B) Zoologist
C) Existing cells
D) Cell wall
E) Plasma membranes
F) Botanist
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