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Which one of the following statements is correct, with reference to enzymes?

1) Apoenzyme = Holoenzyme + Coenzyme 2) Holoenzyme = Apoenzyme + Coenzyme 3) Coenzyme = Apoenzyme + Holoenzyme 4) Holoenzyme = Coenzyme +... View Article

Which type of immune-response is responsible for rejections after organ/tissue transplantation?

1) Autoimmune response 2) Cell-mediated immune response 3) Hormonal immune response 4) Physiological immune response Answer: 2) Cell-mediated... View Article

Mycorrhizae are the example of

1) Fungistasis 2) Amensalism 3) Antibiosis 4) Mutualism Answer: 4) Mutualism Explanation: Mycorrhiza is an example of mutualism. It is a... View Article

The hepatic portal vein drains blood to liver from

1) Heart 2) Stomach 3) Kidneys 4) Intestine Answer: 4) Intestine Explanation: Hepatic portal system is the vascular connection between the... View Article

Which among these is the correct combination of aquatic mammals?

1) Seals, Dolphins, Sharks 2) Dolphins, Seals, Trygon 3) Whales, Dolphins, Seals 4) Trygon, Whales, Seals Answer: 3) Whales, Dolphins, Seals... View Article

The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as

1) Core zone 2) Buffer zone 3) Transition zone 4) Restoration zone Answer:1) Core zone Explanation: Biodiversity rich regions are legally... View Article

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?

1) 1 2) 11 3) 33 4) 333 Answer: 3) 33 Explanation: Deletion of one base at position 901 will cause a change in the reading frame from that... View Article

Identify the wrong statement in context of heartwood.

1) Organic compounds are deposited in it 2) It is highly durable 3) It conducts water and minerals efficiently 4) It comprises dead elements... View Article

The morphological nature of the edible part of coconut is

1) Perisperm 2) Cotyledon 3) Endosperm 4) Pericarp Answer:3) Endosperm Explanation: The edible part of the coconut is the endosperm. It has... View Article

Which of the following are found in extreme saline conditions?

1) Archaebacteria 2) Eubacteria 3) Cyanobacteria 4) Mycobacteria Answer: 1) Archaebacteria Explanation: Archaebacteria are found in... View Article

Which of the following statements is correct regarding the loop of Henle?

1) The ascending limb of loop of Henle is impermeable to water 2) The descending limb of loop of Henle is impermeable to water 3) The ascending... View Article

Which of the following facilitates opening of stomatal aperture?

1) Contraction of outer wall of guard cells 2) Decrease in turgidity of guard cells 3) Radial orientation of cellulose microfibrils in the cell... View Article

An important characteristic that Hemichordates share with Chordates is

1) Absence of notochord 2) Ventral tubular nerve cord 3) Pharynx with gill slits 4) Pharynx without gill slits Answer: 3) Pharynx with gill... View Article

In Bougainvillea thorns are the modifications of

1) Stipules 2) Adventitious root 3) Stem 4) Leaf Answer: 3) Stem Explanation: Thorns are the modification of axillary buds of stems.... View Article

A decrease in blood pressure/volume will not cause the release of

1) Renin 2) Atrial Natriuretic Factor 3) Aldosterone 4) ADH Answer: 2) Atrial Natriuretic Factor Explanation: Atrial natriuretic factor or... View Article

A gene whose expression helps to identify transformed cell is known as

1) Selectable marker 2) Vector 3) Plasmid 4) Structural gene Answer: 1) Selectable marker Explanation: Selectable marker helps in... View Article

Which of the following are not polymeric?

1) Nucleic acids 2) Proteins 3) Polysaccharides 4) Lipids Answer: 4) Lipids Explanation: Lipids are not polymers, they are normally esters... View Article

Viroids differ from viruses in having

1) DNA molecules with protein coat 2) DNA molecules without protein coat 3) RNA molecules with protein coat 4) RNA molecules without protein... View Article

In case of poriferans the spongocoel is lined with flagellated cells called

1) Ostia 2) Oscula 3) Choanocytes 4) Mesenchymal cells Answer:3) Choanocytes Explanation: In poriferans or sponges, the spongocoel and... View Article

Which one of the following statements is not valid for aerosols?

1) They are harmful to human health 2) They alter rainfall and monsoon patterns 3) They cause increased agricultural productivity 4) They have... View Article

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