Question # 1

The first step of krebs cycle is union of acetyl co A with oxaloacetate to form.

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Isocitrate

Citrate

Malate

Alpha ketoglutarate

Which of the following pair of structure-function is mismatched

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Ribosomes, protein synthesis

Nucleolus, ribosomes production

Glogi, muscle contraction

Lysosome, intracellular digestion

Amino acids are arranged in proper sequence during protein synthesis according to the instruction transcribed on

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Transfer RNA

Ribosomal RNA

Messenger RNA

DNA

In Hydra ectodermal cells get food from endodermal cells by

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Endocytosis

Exocytosis

Both a and b

Diffusion

Which one serves to build macromolecules.

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ATP

Glucose

Starch

Karatin

The optimum pH of enzyme pepsin is

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2

6.8

7

9

The active site of an enzyme

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Never changes

Forms no chemical bond with substrate

Determines by its structure the specificity of an enzyme

Looks like a lump projection from the surface of an enzyme

Lichens are very good bio indicators of.

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Air quality

Soil quality

Water quality

Mineral

The infectious proteins are.

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Viruses

Virions

Prions

Peptones

An aphid that attacks walnut tree is being controlled biologically by

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Wasp

House fly

Honey bee

Mosquito

The study of distribution of animals in nature is called.

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Biodiversity

Zoogeography

Geography

Wild life

The earth surface covered with water is

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35%

11%

21%

33%

The execratory product with require minimum water for its removal.

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Urea

Uric acid

Creatinine

Ammonia

Archaeobacteria can tolerate temperature upto.

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120 ^oC

140 ^oC

160 ^oC

180 ^oC

The inner soft wall of human uterus is called.

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Ectometrium

Exometriium

Endometrium

Myoul

Pentose sugar in the molecule of DNA is

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Ribose

Deoxyribose

Sucrose

Lactose

Histones are positively charged due to an abundance of the basic amino acids

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Arginine

Lysine

Both a & c

Alanine

Which one is absent in animal cells.

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spindle

Centriole

Chromatids

Phragmoplast

In skletal muscle, calcium facilitates contraction by binding to:

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Tropomyosim

Troponin

Actin

Myosin

The producers in limnetic zone are

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Amoebae

Cyanobacteria

Crustaceans

Hydrilla

The phase of meiosis during which nuclei disappear int he cell is called.

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Pachytene

Leptotene

Zygotene

Diplotene

Animals of the group of flatworms have simple tubular secretory system called of

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Kidney

Nephron

Protonephridia

Nephridia

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