Cytoskeleton
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The diffusion of water molecules through a selectively permeable membrane is known as
diffusion
imbibition
plasmolysis
osmosis
Question 13
which of the following is not a function of cytoskeleton in a cell?
(a) Intracellular transport
(b) Maintenance of cell shape and structure
(c) Support of the organelle
(d) Cell motility
In plant cells, the cytoplasm of the adjacent cells are connected through bridges called _______.
cell membrane
plasmodesmata
intracellular bridge
intercellular bridge
The cartwheel structure is shown by the
a) Cilia
b) Flagella
c) Centriole
d) All the above
(a) In prokaryotic cell, an outgrowth of plasma membrane into cell is called polysome.
(b) SER is major site for glycoprotein synthesis.
(c) RuBisCO is most abundant protein of biosphere.
(d) Mitochondria, chloroplasts and peroxisomes are not part of endomembrance system.
Of the above statements:
- c and b alone are correct
- b and a alone are correct
- c and d alone are correct
- a and d alone are correct
Reason (R): There are three principal types of protein filaments - actin filament, microtubules and intermediate filaments, which constitute the cytoskeleton.
- Both A and R are correct and R is the correct explanation of A
- Both A and R are correct, but R is not the correct explanation of A
- A is correct, but R is incorrect
- Both A and R are incorrect
- callose deposits
- cellulose microfibrils
- calcium carbonate granules
- proteinaceous filaments
- Immunity of the cell
- Transport of substances
- Provides shape to the cell
- Protein production
Thin myofilaments consist of
actin, tropomyosin, troponin
actin, myosin, troponin
actin, tropomyosin, fibrin
actin, myoglobin, troponin
Do Peroxisomes have a double membrane?
- callose deposits
- cellulose microfibrils
- calcium carbonate granules
- proteinaceous filaments
Reason: There are three principal types of protein filaments-actin filament, microtubules and intermediate filaments, which constitute the cytoskeleton.
- Assertion is true but Reason is false.
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Both Assertion and Reason are false
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Lysosome
- Specialized chromosome
- Spherosome
- Ribosome
What is the composition of microtubules?
Which of the following feature will help you in distinguishing a plant cell from an animal cell?
Cell wall
Cell membrane
Mitochondria
Nucleus
- Liver cell
- Kidney cell
- Erythrocyte
- Leucocyte
The shape of the cell depends on?
How are the organelles able to maintain their position inside the cell?
The plasma membrane is rigid like cement and does not allow the organelles to move
- None of the above
The organelles are attached to cell membrane
The cell matrix consists of protein filaments that keep the organelles in their place
- peroxisomes
- microtubules
- endoplasmic reticulum
- Golgi body
Do peroxisomes break down hydrogen peroxide?
Membrane-bound bodies found in the cytoplasm of a cell and performing definite functions:
Cell membrane
Cell wall
Cell organelles
Plasma membrane
As a cell increases in size, its surface-to-volume ratio decreases which causes the cell to function less efficiently. Discuss ways in which variations in cell structure can help overcome this problem.
- vesicles
- glyoxisomes.
- lysosomes.
- peroxisomes.
Why are both ends of a microtubule different structurally?
- Tubulin
- Actomyosin
- Actin
- Myoglobin
Name the cell organelles which regulates the entry of cell solutes and ions.
- Generate movement
- Provide mechanical stability
- Stabilize microtubules against disassembly
- Transport organelles within the cell
Assertion: Eukaryotic cells have the ability to adopt a variety of shapes and carry out directed movements.
Reason: There are three principal types of protein filaments-microfilaments, microtubules and intermediate filaments, which constitute the cytoskeleton.