Question # 1

At cytokinesis in plants a membrane structure phragmoplast is formed from vesicles which originate from

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Lysosomes

Centrioles

Golgi complex

Glyoxisomes

Synapsis occurs duiring.

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Pachytene

Leptotene

Zygotene

Diplotene

Contractile ring in cytokinesis is formed by

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Tubulin

Actin and Myosin

Keratin

Cyclin

The kinetochore fibres of spindle attach to the kinetochore region of chromosome and align them at the equator of the spindle forming

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Equatorial plate

Metaphase plate

Central plate

Both a & b

Microtubules are composed of protein, tubulin and traces of.

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DNA

Glycolipid

RNA

Phospholipid

Which of the following behaves like normal cells.

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Benign tumor

Cancer

Gall

Malignant tumor

Nuclear membrane disorganizes at the beginning of

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Prophase 1

Metaphase 1

Anaphase 1

Telophase 1

The corpus luteum is formed at the site of

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Fertilization

Ovulation

Mensturation

Implantation

Apoptosis is.

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Division of cells

Death of cells by tissue damage

suicide of cells

Weakness of cells

What are significant happening of meiosis.

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Crossing over

Random assortment of chromosome

Linkage

Crossing over and random assortment of chromosomes

Which tumor is delocalized or has branches other than site of orgin.

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Benign

Malignant

Both

Apoptosis

The autosomal non disjunction in man in which 21st pair of chromosome fail to segregate resulting in gametes with 24 chromosomes is.

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Down's syndrome

Klinfilter syndrome

Turner's syndrome

Jacob's syndrome

Pairing of homologous chromosomes for tetrad formation starts at.

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Leptotene

Zygotene

Diplotene

Pachytene

Cancer is caused mainly by mutation in.

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somatic cells

Sex cells

Malignant cells

Reproductive cells

First essential phenomenon of meiosis i.e pairing of homologous Chromosomes called synapsis starts in

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Leptotene

Zygotene

Pachytene

Diplotene

Fertilization of the ovum normal occurs:

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In the upper thrid of the oviduct

In the lower thrid of the oviduct

In the uterus

Can take place succcessfully in vegina

The period of life cycle of cell between two consecutive divisions is termed as.

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Resting phase

Inter phase

G1 phase

G2 Phase

An unwanted clone of cells and establishment of secondary areas of growth is called.

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Tumor

Growth

Lump

Swelling

Shape of the plant cell does not change greatly compared with an animal cell because it is surrounded by a rigid

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Cell membrane

Capsule

Sheath

Cell wall

Meiosis occurs only in

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Haploid cell

Diploid cells

Pentaploid cells

Triploid cells

The condensation of chromosomes reaches to its maximum during.

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Pachytene

Zygotene

Leptotene

Diakinesis

Crossing over occurs during.

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Leptotene

Pachytene

Zygotene

Anaphase

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