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प्रश्न
What is refer-ed to as satellite chromosome?
उत्तर
Sometimes a few chromosomes have non-staining secondary constrictions at a constant location. This gives the appearance of a small fragment called the satellite or trabant. These chromosomes are called sat (satellite) chromosomes. The nucleolus is formed by sat chromosome.
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संबंधित प्रश्न
Describe the structure of the following with the help of labelled diagram.
Nucleus
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.
Chromosome having centromere in its middle is
When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred to as ______
Match List - I with List - II.
| List - I | List - II | ||
| (a) | Cristae | (i) | Primary constriction in chromosome |
| (b) | Thylakoids | (ii) | Disc-shaped sacs in Golgi apparatus |
| (c) | Centromere | (iii) | Infoldings in mitochondria |
| (d) | Cisternae | (iv) | Flattened membranous sacs in the stroma of plastids |
Choose the correct answer from the options given below.
A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is ______.
Discuss briefly the role of nucleolus in the cells actively involved in protein synthesis.
Write the function of the following:
Centromere
Explain the functions of the nuclear pores.
