Question # 1

In which stage of the cell cycle each chromosome is duplicated and so it consists of two chromatids?

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GI

S

M

G2

Modern classification (binomial nomenclature) is based on the work of:

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Caesalpino

John Ray

Tournefort

Carolous Linnaeus

Phenomenon of crossing over in fruit fly was observed by:

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T.H. Morgan

W.Flemming

Oscar Hertwig

Louis pasteur

................ occurs in somatic cells.

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Meiosis I

Meiosis II

Mitosis

None

Which of the following distinguishes meiosis from mitosis?

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The chromosome number is reduced

Chromosomes undergo crossing over

The daughter cells are genetically different from the parent cell.

All of the above

Necrosis is:

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Division of cells

Suicide of cells

Cell death by tissue damage

Weakness of cells

Cells of which of the followings are called cancerois cells?

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Malignant tumer

Benign tumer

Both a and b

None of the above

Two consecutive cell division occurs in ..............

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Meiosis

Mitosis

Interphase

None

Cytokinesis in animals take place by:

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Furrow

Phragmoplast

Telophase

None of these

In which stage of the cell cycle, the cell is preparing enzymes for chromosome duplication.

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G1

G2

S

M

Which event distinguishes meiosis form mitosis?

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Condensation of chromosomes

Loss of the nuclear membrane

Formation of metaphase plate

Pairing of homologous chromosomes

Down's syndrome is case of .................. .

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Autosomy

Monosomy

Trisomy

Tetrasomy

In which stage of the cell cycle most cells spend their lives?

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Prophase

Metaphase

Interphase

Telohase

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9th Class Biology Chapter 5 Cell Cycle English Medium KPK Boards Online Mcqs MCQs With Answers

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