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Earn 100
In humans, the least number of genes are present on X chromosome or Y chromosome?
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Important Questions on The Unit of Life
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Fill up the blanks with suitable words, respectively.
Each chromosome has a ____ or _____ on the sides, disc shaped structure is called _____. The _____ chromosome has two equal arms, ____ chromosome has one shorter and one long arm. _____ chromosome has no second arm. The secondary constriction develop small fragment called ______
A) metacentric
B) telocentric
C) centromere
D) primary constriction
E) submetacentric
F) satellite
G) kinetochore
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Match List - I with the List - II.
| List - I | List - II | ||
| (a) | Metacentric chromosome | (i) | Centromere situated close to the end forming one extremely short and one very long arms |
| (b) | Acrocentric chromosome | (ii) | Centromere at the terminal end |
| (c) | Sub-metacentric | (iii) | Centromere in the middle forming two equal arms of chromosomes |
| (d) | Telocentric chromosomes | (iv) | Centromere slightly away from the middle forming one shorter arm and one longer arm |
Choose the correct answer from the options given below:
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Identify the part labelled as ‘’ in the diagram given below:
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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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There are _____ pairs of chromosomes in human beings. [Write the value in digits]
