Biology 9th Class Urdu Medium Chapter 4(Cells and Tissues) Online Short questions with Answers Preparation

Question # 1

Difference between Diploid cells and Haploid cells

Ans 1: Diploidmeans cells have full number of chromosomes
Somatic cells are diploid (2n) cells.
These are responsible for growht and maintenance of the organismsm
These are producred by meiosis.
Diploid number of chromosomes in man in 46
Ans 2: Haploid Cells:
Haploid means cells having half number of chromosomes
Germ line cells are haploid (n) cells.
These are involved in sexual reproduction.
Theser are proeuced by mitosis
The haploid number of chromosomes in man is 23

Question # 2

Difference between Centromeres and Centrioles

Ans 1: Centromeres:
The centromere is a constriction in chromosome, where chromatids are joind with eachother.
Ans 2: Centrioles:
a pair of centrioles locatd near the anterior surface of the nucleus. It consist of triple of microtublues arrange dto form a hollow cylinder.

Question # 3

What is the differecne between prophase of mitosis and prophase -I of meiosis-I.

Ans 1: Prophase of mitosis:
Pairing of homolgous chromosomes does not take palce
Crossing over is absent
Ans 2: Prophase -I of mesiosis-i:
During Prophase-I paring of homolgousl chromosomes takes palce
Crossing over leads to genetic recombination.

Question # 4

What is the role of spindle fibres in mitosis.

Ans 1: During mitosis, spindle fibres ensure the accurate separation of sister chromatids of chromosoemes attache dwith spindle fibres in telephase.

Question # 5

What are teh key events of anaphase in mitosis.

Ans 1: i. Constrictio of spindle fibers towards their respective poles.
ii. Equal separation of sister chromatids of chromosoems.

Question # 6

Difference between Mitosis and Meiosis

Ans 1: Mitosis:
It takes place in somatic cells
It consists of one division
Crossing over does not take place drung prophase
Chromatides divides at anaphase
Individiual duplicated chromosome align at the metaphase plate during metaphase
Daughter chromosoem mvoe to opposite poles during anaphase
Two dipliud daughter cells are formed.
The number of chromosomes remains censtant.
Ans 2: Meiosis:
It takes place in germ line cells of sex organs.
It consists of two divisions
Crossing over takes place duirng prophase-I
Chromatids does not divide at anaphase-I
Paired homolgous chromosomes align at metaphase plate during metaphase-I
Homolgous chromosomes with two sister chromatids, separate and move to opposite poles during anaphase-I
Four haploid daughter cells are formed.
The Number of chrosomes becomes half in meiosis.
Meiotic product cannot undergo further divisions.

Question # 7

Enlist the events that occur during the G1 Phase of interphase.

Ans 1: During G1 phase of interphase followign events occur.
i. Cell makes proteins and organelles and so grow in size.
ii. Cell also makes enzymes required in S-phase for replication of DNA.

Question # 8

Difference between Cytokinesis and Karyokinesis.

Ans 1: Cytokineis:
The process of cytoplasmic division to called cytokinesis
Ans 2: Karyokinesis:
The process of nuclear division is called karyokinesis

Question # 9

What is M-Phase

Ans 1: In this phase cell is divided into two daughter cells. This phase is called M-Phase

Question # 10

During which phase of mitosis sister chromatides separate?

Ans 1: During anaphase spidnle fibres attached with chromosoems pull towards teh poles, making the sister chromatids for chromosomes separated.

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Online Short Questions For Chapter 4 "9th Class Biology Urdu Medium Chapter 4 Preparation "

Biology (New Book) - 9th Class Biology Urdu Medium Chapter 4 Preparation

Difference between Diploid cells and Haploid cells

Difference between Centromeres and Centrioles

What is the differecne between prophase of mitosis and prophase -I of meiosis-I.

What is the role of spindle fibres in mitosis.

What are teh key events of anaphase in mitosis.

Difference between Mitosis and Meiosis

Enlist the events that occur during the G1 Phase of interphase.

Difference between Cytokinesis and Karyokinesis.

What is M-Phase

During which phase of mitosis sister chromatides separate?

Prepare Complete Set Wise Questions For Chapter 4 "9th Class Biology Urdu Medium Chapter 4 Preparation "

Set 1

9th Class Biology Urdu Medium Chapter 4 Preparation - Set 1

Difference between Diploid cells and Haploid cells

Difference between Centromeres and Centrioles

What is the differecne between prophase of mitosis and prophase -I of meiosis-I.

What is the role of spindle fibres in mitosis.

What are teh key events of anaphase in mitosis.

Difference between Mitosis and Meiosis

Enlist the events that occur during the G1 Phase of interphase.

Difference between Cytokinesis and Karyokinesis.

What is M-Phase

During which phase of mitosis sister chromatides separate?

9th Biology Urdu Medium Chapter 4 Preperation

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