Question # 1

Which of these material is not a component of the plasma membrane?

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Lipids

Carbohydrates

Proteins

DNA

A cubic millimeter of blood contain about ............. million RBCs.

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5

10

15

20

Who reported that all animal tissues are also composed of individual cells?

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Robert Hooke

Lorenz Oken

Robert Brown

Schwann

When a plant was kept in darkness for many days, its leaves turnes yellow. Why?

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Leaves could not yet oxygen and so there was no photosynthesis

Leaves could not get light and so there was no respiration

Leaves could not get oxygen and so there was no respiration

Leaves could not get light and so there was no photosynthesis

Diffusion is a _______________ process.

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Slow

Fast

Both

None

There are _______________ chromosomes in humans.

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46

18

16

23

.................. is most abundant substance in human body.

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Water

Carbon

Nitrogen

Phosphorus

Chlorophyll pigment absorbs maximum light in wavelengths of:

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Green and blue

Green and red

Green only

Red and blue

The average temperature for human is ...............°C.

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35°C

36°C

37°C

38°C

................. in blood stream plays an important role in blood clotting.

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Calcium

Phosphorus

Nitrogen

Potassium

In which compound of the leaf cells, chlorophyll is present?

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Stroma

Thylakoids

Plasma membrane

Cytoplasm

The deficiency of which hormone cause goitre?

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insulin

thyroxin

parathormone

epinephrine

Nitrogen is an important component of:

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Proteins

Nucleic acid

Lipids

Both a and b

Horizontal underground stems with scale leaves are called:

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stem tubers

rhizomes

corms

bulbs

The thickness of biosphere is:

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02 km

20 km

50 km

200 km

Sequence of amino acid is protein is controlled by sequence of ___ in DNA.

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Genes

Loci

Nucleotides

Alleles

The addictive drug use to reduce pain are:

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Sedatives

Narcotics

Marijuana

Antibiotics

In tissue culture technique, cell starts mitosis and produce masses of cells called.

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Clonning

Graftings

Calluses

Rhizome

Which of the following organisms are decomposers?

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Fungi

Algae

Bacteria

Both a and c

In retina the photosensitive cells are:

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rods

cones

neurons

both A and B

Paracitamol is:

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Sedative

Analgesics

Antibiotics

Vaccines

Which one is an example of epiphyte?

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Mosquito

Orchid

rhizobium

Plasmodium

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