Question # 1

The means by which recombinant DNA is introduced into a host call is called

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Plasmid

Carrier

Vector

Lifter

Diseases in living organisms caused by parasites are called.

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Infestation

Endoparasites

Disinfestation

Ectoparasites

DNA threads are chemically cut into pieces of different sizes in

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Maxam-Gilbert method

Sanger's method

Smith's method

Sanford's method

All of the following bones are associated with coxal bones, except.

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Illum

Ischium

Pubis

Calvicle

Downs syndrome (Mongolism) occurs in man during which 21^st chromosome falls to segregate resulting gamete with

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20 chromosomes

21 chromosomes

22 chromosomes

24 chromosomes

Who was the first to propose an objective definition of instincts in terms of animal behaviour

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Darwin

Lamarck

Wallace

Lyell

Hardy Weinberg's theorem describes the frequencies of genotype of non evolving.

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Family

Population

Species

Community

Each bivalent consists of four.

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Chromosomes

Chromatids

spores

Chiasmata

The children with "SCID" lack an enzyme.

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a galactosidase

Phenylalanine hydroxylase

Adenosine deaminase

Succinic dehydrogenase

Which of the following statements conserning the role of Ca⁺² inthe contraction of skeletal muscle is correct?

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The mitochondria act as a store of Ca⁺²for the contractile process

Ca⁺²entry across the plasma membrane is important in sustaining the contraction of skeletal muscle

A rise in inter cellular Ca⁺²allows actin to interact with myosin

The tension of a skeletal muscle fiber is partly regulated by G proteins muscle

A gene with multiple phenotypic effect is.

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Polygenic

Bombay type

Pleiotropic

Monogenic

Cortisol brings about an increase in blood glucose level mainly by its production from protein and by

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Insulin

Glucagons

Oestrogen

Progesterone

Human skin colour is controlled by gene pairs.

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Two to four

Three to six

Four to six

Six to ten

The wall of trachea(windpipe) and bronchi of man is fernished with a series of incomplete:

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Cartilagenous plates

Chitinous rings

Cartilaginous rings

Muscular rings

Urea is produced in

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Lungs

Liver

Kidney

Pancreas

From Hensen's node,dorsal mesoderm is formed and is organized into

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Segments

Fragments

Somitcs

Remains

Highly condensed portions of the chromatin are called.

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Homochromatin

Heterochromatin

Euchromatin

Achromatin

ABO system has four different phenotypes which are distinct from each other on the basis of specific antigens on the surface of

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Mitochondria

Gogli bodies

RBC

Centrioles

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