OBJECTIVES OF CELL DIVISION

Mole Choice Questions MCQs

Four options are given at the end of each statement. You should encircle one option from them.

The centromere is a specific DNA sequence of about number of nucleotides.

(a) 110                         (b) 230                         (c) 220                         (d) 330
DNA replicates during:

(a) G1 phase                (b) S phase                 (c) G2 phase                (d) None
Cell divides during:

(a) Gi phase                (b) S phase                 (c) G2 phase                (d) M phase
Crossing over take place during:

(a) Lentntene               (b) Pachytene             (c) Diakinesis              (d) Diplotene
gmatids rt.pel each other in:

(a) Leptotene               (b) Pachytene             (c) Diakinesis              (d) Diplotene
Charismata dissolve in:

(a) Leptotene               (b) Pachytene             (c) Diakinesis              (d) Diplotene

ns:

. (c) 2. (b) 3. (d) 4. (b) 5. (d) 6. (c)

Fill in the blanks

  1. The type of cell division in which number of chromosomes remains

constant in the daughter generations is called ______________

  1. An exact copy of the DNA is formed before the cell division. This process is

called _______________

  1. Sister chromatids are attached by__________________
  2. A contracting belt of microfilaments are present in the middle of the cell.

These microfilaments are called the______________ ring.

  1. MPF belongs to a family of enzymes called _____________
  2. is a type of cell division in which number chromosome reduced to one half in the daughter cell.
  3. The fusion of gamete is called _________________
  4. The _ chromosomes carry genes for the same traits, have
    same length, and have a similar staining pattern. Ans:

1. mitosis                               2. replication                         3. centromere

4. contractile                          5. protein kinases                6. Meiosis

7. syngamy                            8. homologous

Short Questions

  1. What is mitosis? Name its different phases.

Ans: The type of cell division in which number of chromosomes remains constant in the daughter. generations is called mitosis. Mitosis is divided into four phases: prophase, metaphase; anaphase, and telophase.

  1. What is contractile ring?

Ans: A contracting belt of microfilaments are present in the middle of the cell These microfilaments are called the contractile ring.

  1. What are restriction points during cell cycle?

Ans: A crucial checkpoint occurs late in the G1 before DNA synthesis (the S phase). This is called restriction point. If all the internal and external factors are favorable, the cells copy its DNA. Then it divides.

  1. What is meiosis?

Ans: Meiosis is a type of cell division in which number chromosome reduced to one half in the daughter cell.

  1. What are homologous chromosomes?

Ans: The homologous chromosomes carry genes for the same traits, have same length, and have a similar staining pattern.


----------------------------


----------------------------

True/ False                 (For Punjab University only)

Marks are True or False statement Give correct statement if false

Statement

  1. The type of cell division in which number of chromosomes remains constartt in the daughter generations is called mitosis.
  2. The formation of sperm in the testes is called oogenesis.
  3. The formation of ova or egg in the ovaries is called oogenesis.
  4. Synapsis also initiates crossing over.
  5. The microtubules in the mitotic spindle shorten.
  6. The period from the time a cell is produced until it completes mitosis is called mitosis.
  7. The daughter chromosomes begin to uncoil for gene expression.
  8. The ring contract and pinches the plasma membrane inward. It forms a
    cleavage furrow.

Ans:

 

Statement T/F Correct Statement
  1.  
The type of cell division in which           •

number of chromosomes remains constant in the daughter generations is called mitosis.

T 36 molecules of ATP is              _

produced during oxidation of one molecule of glucose.

  1.  
The formation of sperm in the testes is called oogenesis. F The formation of sperm in the testes is called

  1.  
The formation of ova or egg in the ovaries is called oogenesis. T  
  1.  
Synapsis also initiates crossing over.    
  1.  
The microtubules in the mitotic spindle shorten. T  
  1.  
The period from the time a cell is produced until it completes mitosis is called mitosis. F The period from the time a cell is produced until it completes mitosis is called cell cycle.
  1.  
The daughter chromosomes begin to uncoil for gene expression. T  
  1.  
The ring contract and pinches the plasma membrane inward. It forms a cleavage furrow. T  

 

Similar Articles:

Leave a Reply

Your email address will not be published. Required fields are marked *