Recent questions and answers in 2008

Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature? OPTIONS :

answered Apr 21, 2020 by teacher.perumal

2 answers

Ascaris is characterized by :

answered Feb 6, 2020 by meena.clay6

1 answer

Consider the following statements about biomedical technologies, (i) During open heart surgery blood is circulated in the heart-lung machine (ii) Blockage in coronary arteries is removed by angiography (iii) Computerised Axial Tomography (CAT) shows detailed internal structure as seen in a section of body. (iv) X-ray provides clear and detailed images of organs like prostate glands and lungs Which two of the above statements are correct?

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following in birds, indicates their reptilian ancestry?

answered Feb 6, 2020 by meena.clay6

1 answer

Main objective of production/use of herbicide resistant GM crops is to:

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following scientist's name is correctly matched with the theory put fourth by him? OPTIONS

answered Feb 6, 2020 by meena.clay6

1 answer

The fleshy receptacle of syconus of fig encloses a number of:

answered Feb 6, 2020 by meena.clay6

1 answer

Importance of day length in flowering of plants was first shown in:

answered Feb 6, 2020 by meena.clay6

1 answer

Electrons from excited chlorophyll molecule of photosystem II are accepted first by:

answered Feb 6, 2020 by meena.clay6

1 answer

In humans, at the end of the first meiotic division, the male germ cells differentiate into the:

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?

answered Feb 6, 2020 by meena.clay6

1 answer

Keeping in view the "fluid mosaic model" for the structure of cell membrane, which one of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip- flop movement)?

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following items gives its correct total number?

answered Feb 6, 2020 by meena.clay6

2 answers

Which one of the following pairs of plant structures has haploid number of chromosomes?

answered Feb 6, 2020 by meena.clay6

1 answer

The haemoglobin of a human foetus:

answered Feb 6, 2020 by meena.clay6

1 answer

The energy-releasing process in which the substrate is oxidized without an external electron acceptor is called:

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following is the correct statement regarding the particular psychotropic drug specified?

answered Feb 6, 2020 by meena.clay6

1 answer

Nitrogen fixation in root nodules of Alnus is brought about by:

answered Feb 6, 2020 by meena.clay6

1 answer

What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?

answered Feb 6, 2020 by meena.clay6

1 answer

A transgenic food crop which may help in solving the problem of night-blindness in developing countries is:

answered Feb 6, 2020 by meena.clay6

1 answer

To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?

answered Feb 6, 2020 by meena.clay6

2 answers

Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?

answered Feb 6, 2020 by meena.clay6

1 answer

Trichoderma harzianum has proved a useful microorganism for:

answered Feb 6, 2020 by meena.clay6

1 answer

Bacterial leaf blight of rice is caused by a species of:

answered Feb 6, 2020 by meena.clay6

1 answer

Consider the statements given below regarding contraception and answer as directed thereafter: (i) Medical Termination of Pregnancy (MTP) during first trimester is generally safe (ii) Generally chances of conception are nil until mother breast-feeds the infant upto two years (iii) Intrauterine devices like copper-T are effective contraceptives (iv) Contraception pills may be taken upto one week after coitus to prevent conception. Which two of the above statement are correct?

answered Feb 6, 2020 by meena.clay6

1 answer

Cry1 endotoxins obtained from Bacillus thuringiensis are effective against:

answered Feb 6, 2020 by meena.clay6

1 answer

The slow rate of decomposition of fallen logs in nature is due to their:

answered Feb 6, 2020 by meena.clay6

1 answer

Carbohydrates are commonly found as starch in plant storage organs. Which of the following five (1-5) properties of starch make it useful as a storage material? (1) Easily translocated (2) Chemically non-reactive (3) Easily digested by animals (4) Osmotically inactive (5) Synthesized during photosynthesis

answered Feb 6, 2020 by meena.clay6

2 answers

Match the disease in Column I with the appropriate items (pathogen/ prevention/ treatment) in Column II.

answered Feb 6, 2020 by meena.clay6

1 answer

What does the filiform apparatus do at the entrance into ovule?

answered Feb 6, 2020 by meena.clay6

1 answer

Cellulose is the major component of cell walls of :

answered Feb 6, 2020 by meena.clay6

1 answer

According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following is resistant to enzyme action?

answered Feb 6, 2020 by meena.clay6

1 answer

In humans, blood passes from the post caval to the diastolic right atrium of heart due to:

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?

answered Feb 6, 2020 by meena.clay6

1 answer

Cornea transplant in humans is almost never rejected. This is because:

answered Feb 6, 2020 by meena.clay6

1 answer

What is antisense technology?

answered Feb 6, 2020 by meena.clay6

1 answer

Modern detergents contain enzyme preparations of:

answered Feb 6, 2020 by meena.clay6

1 answer

Consider the following statements concerning food chains: (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation (ii) Removal of most of the carnivores resulted in an increased population of deers (iii) The length of food chains is generally limited to 3-4 trophic levels due to energy loss (iv) The length of food chains may vary from 2 to 8 trophic levels

answered Feb 6, 2020 by meena.clay6

1 answer

During the propagation of a nerve impulse, the Q action potential results from the movement of:

answered Feb 6, 2020 by meena.clay6

1 answer

The table below gives the populations (in thousands) of ten species (A-J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows: Area and Species, and their populations (in thousands) in Number areas of Habitats A B C D E F G H I J a (11) 2.3 1.2 0.52 6.0 - 3.1 1.1 9.0 - 10.3 b (11) 10.2 - 0.62 - 1.5 3.0 - 8.2 1.1 11.2 c (13) 11.3 0.9 0.48 2.4 1.4 4.2 0.8 8.4 2.2 4.1 d (12) 3.2 10.2 11.1 4.8 0.4 3.3 0.8 7.3 11.3 2.1 Which area out of a to d shows maximum species diversity?

answered Feb 6, 2020 by meena.clay6

1 answer

A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this? (i) Lots of urea and phosphate fertilizer were used in the crops in the vicinity (ii) the area was sprayed with DDT by an aircraft (iii) The lake water turned green and stinky (iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis Which two of the above were the main causes of fish mortality in the lake?

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following proved effective for biological control of nematodal disese in plants?

answered Feb 6, 2020 by meena.clay6

1 answer

In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea?

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following is the correct difference between Rod cells and Cone cells of our retina? OPTIONS :

answered Feb 6, 2020 by meena.clay6

1 answer

In germinating seeds fatty acids are degraded exclusively in the:

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following phyla is correctly matched with its two general characteristic?

answered Feb 6, 2020 by meena.clay6

1 answer

The $C_4$ plants are photosynthetically more efficient than $C_3$ plants because

answered Feb 6, 2020 by meena.clay6

1 answer

Which one of the following is hetero-sporous?

asked Jul 26, 2018 by pady_1

1 answer

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