What is G0 (quiescent phase) of cell cycle?
G0 or quiescent phase is the stage where cells remain metabolically active, but do not proliferate unless called to do so. Such cells are used for replacing the cells lost during injury.
Popular Questions of Class 11 Biology
- Q:- Describe briefly the four major groups of Protozoa.
- Q:- Why are living organisms classified?
- Q:- State two economically important uses of: (a) Heterotrophic bacteria (b) Archaebacteria
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Define a taxon. Give some examples of taxa at different hierarchical levels.
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What are the steps involved in formation of a root nodule?
- Q:- How is a key helpful in the identification and classification of an organism?
- Q:- Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.
- Q:- What is stomatal apparatus? Explain the structure of stomata with a labelled diagram.
Recently Viewed Questions of Class 11 Biology
- Q:- Name the following:
(a) A chordate animal having flame cells as excretory structures
(b) Cortical portions projecting between the medullary pyramids in the human kidney
(c) A loop of capillary running parallel to the Henles loop. - Q:- Organise a discussion in your class on the topic- Are viruses living or non-living?
- Q:- Answer the following: (i) What is the function of nephridia? (ii) How many types of nephridia are found in earthworm based on their location?
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How are polysaccharides and disaccharides digested?
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Match the following (a) Cristae (i) Flat membranous sacs in stroma (b) Cisternae (ii) Infoldings in mitochondria (c) Thylakoids (iii) Disc-shaped sacs in Golgi apparatus
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What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.
- Q:- Write true or false. If false change the statement so that it is true.
(a) Actin is present in thin filament
(b) H-zone of striated muscle fibre represents both thick and thin filaments.
(c) Human skeleton has 206 bones.
(d) There are 11 pairs of ribs in man.
(e) Sternum is present on the ventral side of the body. - Q:- What are the main steps in aerobic respiration? Where does it take place?
- Q:- What are macromolecules? Give examples.
- Q:- Figure 13.10 shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions:
(a) At which point/s (A, B or C) in the curve is light a limiting factor?
(b) What could be the limiting factor/s in region A?
(c) What do C and D represent on the curve?
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