Question # 1

Stomata close when guard cells:

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Loss water

Gain chloride ions

Become turgid

Grain potassium ions

The fund event of interphase occurs with .............. .

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Replication of DNA

Replication of centriol

Movement of centriol

Both a & b

Membrane stack is chloroplast is called:

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Sturma

Granum

Both

None

Anaerobic respiration occurs in the absence of ............. .

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Oxygen

Carbon

Nitrogen

All

The site for Calvin cycle is:

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Stroma

Grana

Plasmodesmata

Cytoplast

When we add more substrate to an already occurring enzymatic reaction and there is no increase in the rate of reaction what would you predict?

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All active sites have been occupied by substrate molecules

The enzyme molecules have denatured

More substrate acted as inhibitor

More substrate has disturbed the pH of the medium

Beriberi can be produced by the lack of ......... .

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Vitamin A

Vitamin B

Vitamin BI

Vitamin C

There are about ____________ different kind of vertebrates on earth.

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12,000,00

47,000

12,000

47,500

Which of the following is unique to mitosis and not a part of meiosis?

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Homologous chromosomes pair forming bivalents

Homologous chromosomes cross over

Chromosomes pairs are broken during anaphase

Chromatids separate during anaphase

An enzyme, which breaks down starch is:

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Protease

Amylase

Tripsn

Lipase

According to (UNICEF), how many children of under age five died by malnutrition?

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4 million

5 milion

6 million

None

An organism that actively hunts other organisms is called.

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Prey

Predator

Parasite

Host

A network of all the feeding relationships in an ecosystem is called.

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Food chain

Food web

Trophic level

Energy flow

Lobe concerned with hearing and smelling is:

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Frontal

Parietal

Occipital

Temporal

Lacuna is present in the cartilage of:

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Bone

Matrix

Collagen

Cartilage

What is true about vaccines?

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protect against the future viral and bacterial infections

Treat the existing bacterial infections only

Treat existing infections and also protect against infections

Protect against viral infection only

If a planarian breaks into many pieces instead of two, it will be called.

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Budding

Spore formation

Binary fission

Fragmantation

A symbiotic interaction in which both partners get benefits.

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Mutualism

Commensalism

Parasitism

Predation

Male gametes are called:

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sperms

eggs

testes

ovaries

What waste products are excreted by kidneys?

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Urea, water & salts

Salts, water and carbon dioxide

Urea & Water

Urea & salts.

Cartilage is made up of:

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Matrix

Collagen

Chondrocytes

Ligaments

Flower of which plant is pollinated by wind:

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Rose

Sunflower

Grass

Butter cup

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