Question # 1

................... is the most acceptable model to understand the structure of well membrane.

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Sandwich permeable

Fluid Mosaic Model

Darwin Model

All

Dengue fever is transmitted by

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Culex mosquito

Anopheles mosquito

Aedes mosquito

None of these

Which of the following is a function of human blood?

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It regulates body temperature

It transports wastes

It provides defence

All of the above

Cytokinesis in a plant cell is characterized by:

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The equal division of homologous chromosomes

A pinching off of the cell membrane to divide the cell

The formation of a cell plate in the cytoplasm

The movement of the chromosomes from the metaphase plate

National animal of Pakistan is:

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Cow

Goat

Markhor

None of these

Experimentation is only a step of the scientific process but it is very important step because it always:

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Gives the biologist a correct result

Allows rejection of some alternative hypothesis

Ensures that hypothesis can be confirmed with certainity

Give scientists a chance to work in the laboratory

Activation energy is required to:

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Activation enzyme

Start a reaction

Speed up a reaction

None

............... was English scientist.

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Robert Hooke

Leeuwenhoek

Dolland

Robert Brown

Smooth endoplasmic reticulum is the area in a cell where __________ are synthesized.

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Polysacchrides

Proteins

Lipids

DNA

Micronutrients of plants are:

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Available in the soil in small amounts

Required by plants in small amounts

Small molecules required by plants

Useful, but not required by the plants

There are _______________ chromosomes in onion.

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46

18

16

23

The process of mitosis ensures that:

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Each new cell is genetically different from its parent

Each new cell receives the proper number of chromosomes

Cell will divide at the appropriate time

Chromosomes duplicated without errors.

What may be the reason that children need more calcium and iron?

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Both calcium and iron for bones

Both calcium and iron for blood

Calcium for blood and iron for bones

Calcium for bones and iron for blood

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