Unit 1 Chapter - 2. Question Paper
Structure of Chromosomes, Cell cycle and Cell Division
1. Name the following:
A. The point of attachment of two chromatid.
B. A Non dividing phase of the cell cycle where more DNA is synthesized
C. Pair of corresponding chromosome of the same shape and size and derived one from each parent.
D. The number of chromosomes present in an nerve cell of a human being.
E. The complex consisting of a DNA strand and core of histone.
F. The exchange of chromatin parts between the maternal and paternal chromatids of a pair of homologous chromosome during meiosis.
G. The repeating component of each DNA stands length wise.
H. The cell component visible only during cell division. Ys
2. Given below are certain groups of terms in each group the first pair indicate a relationship between the two term rewrite and complete the second pair on a similar basis
A. Cytoplasm : Cytokinesis :: Nucleus: _________
3. Differentiate between the following pairs on the basis of what is mentioned in the bracket
A. Metaphase and Anaphase ( position of chromosomes)
B. Chromosome and Chromatid
C. Centrosome and Centromere
D. Aster and Spindle Fibre.
E. Haploid and Diploid.
4. Correct the following statement by changing the underlined word:
A. Nitrogen bonds are present between the complementary nitrogenous base of DNA.
5. Choose the Odd one out from the following terms given name the category to which the others belong :
A. Centrosome , cell wall, cell membrane, large vacoule.
B. Phosphate, RNA , sugar, nitrogenous base
C. Thymine, Cytosine, Adenine , Pepsin
D. Metaphase, Telophase, Prophase, Anaphase, Cytokinesis.
6. The diagram given below represent a stage during cell division study the same and answer the question that follow - [5 Marks]
i) Identify whether it is a plant cell or an animal cell ?
Give a reason support of your answer.
ii ) Name the stage depicted in the diagram. What is the unique feature observed in the stage.
iii) Name the type of cell division that occurs during a) Replacement of old leaves of by the new ones b ) Formation of gamets.
iv) What is the stage that comes before the stage shown in the diagram.
v) Draw a neat labelled diagram of the stage mentioned in ( iv) above keeping the chromosome number constant.
7. Given below is a diagram representing a stage during the mitotic cell division . Study the diagram and answer the following questions.
i) Identify the stage by giving a suitable reason
ii) Is it a plant or an animal cell? Give a reason to support your answer.
iii) Draw a neat labelled diagram of the stage which follows the one shown in the diagram.
iv) How many chromosomes will each daughter cell have after the completion of the above division ?
v) Name the four nitrogenous base.
8. Study the diagram given below which represents a stage during mitotic cell division and answer the question that follow:
i) Identify the stage giving suitable reasons.
ii) Name the parts number 1 and 2 .
iii) What is the technical term of the division of nucleus?
iv) Mention the stage that comes before the stage shown in the diagram. Draw a neat labelled diagram of the stage mentioned.
v) Which is the cell division that results in half the number of chromosome in a daughter cells?
9. The diagram given below represents certain stage of mitosis-
i ) Identify the stage of the cell division
ii) Name the part label A and B .
iii) wthat is the unique feature observed in the stage?
iv) How many daughter cell formed from this type of cell division?
10. Draw a well labelled diagram to show the anaphase stage of mitosis in a plant cell having four chromosome.
11. Draw a well labelled diagram to show metaphase stage of Mitosis cell division in an animal cell having four chromosome.
