HARD
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State difference between protoplasm, cytoplasm and nucleoplasm.

Important Questions on Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.

MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.

Differentiate between the following pairs on the basis of what is mentioned in the brackets:

Metaphase and Anaphase (Position of chromosomes)

MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.

Distinguish between chromatin and chromosome.

MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
Why is the nucleus called the control centre of the cell?
MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.

Write briefly about the following :

Structure of a chromosome.

EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
What is a centromere?
HARD
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.

Define the following:

Autosome 

EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.

Write the function of the following:

Nucleus

                                             

MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
Where are chromosomes found in a cell? State their function.
MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
How can you say that there is a complete parallelism between the behaviour of Mendelian factors and chromosomes ?
HARD
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.

Comment upon the following statements:

Why do gametes have a haploid number of chromosomes?

EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
What are the functions of a chromosome?
MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
What are autosomes?
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
What is the function of nucleus in a cell?
MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
Nucleus is called the control centre of the cell. Give reasons.
MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
Explain the structure of a chromosome.
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
What is the structural unit of a chromosomes?
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
All the chromosomes except the paired sex chromosomes are termed :
EASY
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
Which of the following is a function of nucleus?
MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
Write a short note on the nucleus of a cell.
MEDIUM
Life Sciences>From Molecules to Organisms: Structures and Processes>Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.>Structure and Function - Within cells, special structures are responsible for particular functions, and the cell membrane forms the boundary that controls what enters and leaves the cell.
Clarify the term 'non-disjunction' giving a suitable example to substantiate the same.