Which among the following performs the function of centriole in plant cells?
Plant cells do not have centriole. Hence, polar cap performs the function of centriole.
Vacuoles are enclosed by a membrane called ____.
Vacuoles are enclosed by a membrane called tonoplast.
Who discovered nucleus of the cell?
It was Robert Brown in 1831 that discovered the nucleus in the cell.
Fluid mosaic model was suggested by ____.
Extensive studies by Singer and Nicolson led them to suggest the name "fluid mosaic" for plasma membrane.
Euglena differs from other protozoans in ____.
Protozoans are heterotrophs except euglena. Euglena is an autotroph due to presence of plastids.
Pick out an optical part.
Eye piece is the optical part.
Oxysomes are known as ____.
Oxysomes are small rounded bodies found on cristae. They are also known as F1 particles.
Phagocytosis means "Cell drinking".
Phagocytosis is "Cell eating" and Pinocytosis is "Cell drinking".
Coarse adjustment can be done in a microscope by ____.
Operating the upper knob moves the body tube up and down, in order to focus the specimen.
Mitochondria are also called as____.
Mitochondria produce energy in the form of ATP to cell for all metabolic activities. Hence, it is also called "power house of cell".
Blue - green algae are known as ____.
Blue - green algae are known as cyanobacteria. It shows similarity with bacteria.
Which of the following organisms show endocytosis?
Flexibility of cell membrane allow amoeba to engulf food by endocytosis.
Smooth Endoplasmic Reticulum (SER) is known for ____.
SER is known for lipid metabolism. It also helps in detoxification.
Endoplasmic reticulum remains connected with both plasma membrane and nuclear membrane.
Endoplasmic reticulum helps in the transport of metabolites across different parts of the cell. Hence, it remains connected with both plasma membrane and nuclear membrane.
The term 'Cell' was coined by ____.
Cells were discovered by Robert Hooke and he saw that the cork resembled the structure of a honey comb. Hence, he called these boxes are cells. 'Cell' is a Latin word, means'a little room'.
Which of the following is present in all the cells?
Plasma membrane is the living boundary in all cells.
The cell organelle absent in plant cell is ____.
Centrioles are not present in a plant cell. They are found in the animal cell.
Exoskeleton helps to maintain cell shape in ____.
Exoskeleton helps to maintain cell shape in elphidium.
Chromoplasts are coloured plastids, that lack the ____ colour.
Green colour is present in chloroplasts.
Most multicellular organisms have ____ number of cells.
Due to the large size, multicellular organisms have indefinite number of cells.
Peroxisomes are mostly found in ____.
Peroxisomes are present in hepatic cells and help in metabolism of fatty acids.
Which among the following can be seen under light microscope?
Due to the large size of the nucleus, it is visible under the light microscope.
Which of the following cell organelle is non-living part of a cell?
Cell wall is purely made of cellulose. Hence, it is non-living part of the cell.
Which of the following is an exception to cell theory?
Virus show acellular organisation.
Chlamydomonas is ____ organism.
Chlamydomonas is unicellular organism. Single cell functions as entire organism.
Active transport moves molecules in the direction of ____ to a concentration gradient.
Active transport uses the cells energy to move molecules against a concentration gradient.
Protoplasmic shrinkage observed in plants is termed as ____.
Loss of water by continuous exosmosis leads to reduction in volume of protoplasm and shrinkage of the cell contents away from the cell wall. This is called plasmolysis.
The cell organelle, Golgi apparatus is absent in ____.
Golgi apparatus is absent in prokaryotes like bacteria and blue-green algae.
Robert Hooke observed the cell through a ____.
In the year 1665,only a primitive microscope was available for Robert Hooke. The electron microscope was discovered only in 1940.
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