Biology · NDA previous year questions

Which one among the following animals is a mammal?

1. A.Great Indian Bustard
2. B.Gharial
3. C.Platypus
4. D.Hornbill

The ceilings of a concert hall are generally curved

1. A.because they reflect the sound to the audience.
2. B.because they can absorb noise.
3. C.to have better aeration in the hall.
4. D.as any sound from outside cannot pass through a curved ceiling.

Consider the following diseases : 1. Cholera 2. Tuberculosis 3. Filaria 4. Typhoid Which of the above diseases are caused by bacteria?

1. A.1 and 3 only
2. B.2 and 4 only
3. C.1, 3 and 4
4. D.1, 2 and 4

Consider the following statements in relation to plant tissue ‘chlorenchyma’ : 1. It is formed by the palisade and spongy mesophyll. 2. It is a form of parenchyma which contains chloroplasts. 3. It serves to transport organic solutes made by photosynthesis. 4. It is a thin transparent layer which has chiefly a protective function. Which of the statements given above is/are correct?

1. A.1 and 2 only
2. B.1, 2 and 3
3. C.2 and 4
4. D.1 only

Consider the following statements regarding osmosis in animal cells : 1. If the water potential of the solution surrounding the cell is too high, the cell shrinks. 2. If the water potential of the solution surrounding the cell is too low, the cell swells and bursts. 3. It is important to maintain a constant water potential inside the animal body. 4. In animal cells, water potential far exceeds the solute potential. Which of the statements given above is/are correct?

1. A.1 and 2
2. B.3 only
3. C.4
4. D.2 and 3

Sun emits energy in the form of electromagnetic radiation. The following help in the generation of solar energy. Arrange them in the right sequence beginning from the starting of the cycle : 1. Hydrogen is converted to helium at very high temperatures and pressures. 2. The energy finds its way to sun’s surface. 3. A vast quantity of energy is generated by nuclear fusion. Select the correct answer using the code given below.

1. A.1–2–3
2. B.2–3–1
3. C.3–2–1
4. D.1–3–2

Which of the following statements about sexual reproduction in flowering plants are correct? 1. Stamen is present in the centre of a flower. 2. Stamen produces pollen grains in the ovary. 3. The swollen bottom part of carpel is the ovary. 4. The fusion of germ cells gives rise to zygote. Select the correct answer using the code given below.

1. A.2, 3 and 4 only
2. B.2 and 4 only
3. C.1 and 3 only
4. D.1, 2, 3 and 4

The complete digestion of carbohydrates, proteins and fats occurs in

1. A.stomach
2. B.liver
3. C.small intestine
4. D.large intestine

Which one among the following statements about a healthy diet is correct?

1. A.Regular eating of high-energy snacks between meals is healthy since it provides energy and vitamins in plenty
2. B.Fruits and vegetables make a good choice because their energy content is high
3. C.A balanced diet must contain plenty of fat and protein with little carbohydrates and fibre
4. D.An optimal quantity of fat, protein, carbohydrate with adequate amount of water and fibre makes a healthy diet

The Nobel Prize in Medicine for the year 2012 has been awarded to John B. Gurdon and Shinya Yamanaka for the discovery that

1. A.mature specialized cells can be reprogrammed to become immature cells
2. B.stem cells can be programmed to develop individual body organs
3. C.dendritic cells have a critical role in the development of adaptive immunity
4. D.thymus cells have a critical role in the development of innate immunity

Which one among the following hormones stimulates the plant cells to grow in a manner such that the plant appears to be bent towards light?

1. A.Cytokinin
2. B.Auxin
3. C.Gibberellin
4. D.Abscisic acid

Magnetic Resonance Imaging (MRI) is used in medical diagnosis to obtain images of our internal body organs. This is primarily possible because

1. A.our body possesses a permanent magnet
2. B.MRI uses an external magnet to generate a magnetic field in our body
3. C.MRI uses an external electric field to generate magnetic field in our body
4. D.ions’ motion along our nerve cells generates magnetic fields

A current $I$ flows through a potential difference $V$ in an electrical circuit containing a resistance $R$. The product of $V$ and $I$, i.e., $VI$ may be understood as

1. A.resistance $R$
2. B.heat generated by the circuit
3. C.thermal power radiated by the circuit
4. D.rate of change of resistance

Directions: The following Two (02) items consist of two statements, statement I and statement II. You are to examine these two statements carefully and select the answers to these items using the code given below: Code: Statement I: Red blood cells burst when placed in water. Statement II: Due to the phenomenon of osmosis water enters into red blood cells.

1. A.Both the statements are individually true and statement II is the correct explanation of statement I
2. B.Both the statements are individually true but statement II is not the correct explanation of statement I
3. C.Statement I is true but statement II is false
4. D.Statement I is false but statement II is true

Which one among the following water-borne diseases is not caused by a bacteria?

1. A.Cholera
2. B.Typhoid
3. C.Bacillary dysentery
4. D.Hepatitis A

The process of conventional earlobe piercing does not lead to bleeding. This is because the

1. A.heart does not supply blood to earlobes
2. B.cartilage found in earlobe has lesser blood supply unlike other body parts
3. C.earlobes consist of dead non-dividing tissue
4. D.needle used for ear piercing is sterilized

After entering the human body through mosquito bite, the malarial parasite (plasmodium) shows initial multiplication in

1. A.Spinal chord
2. B.Blood
3. C.Liver
4. D.Spleen

Which one among the following parts of blood carries out the function of body defence?

1. A.Platelets
2. B.White Blood Cells
3. C.Haemoglobin
4. D.Red Blood Cells

Polio disease is caused by

1. A.Bacteria
2. B.Fungi
3. C.Virus
4. D.Worm

Which of the following group is present in animal cells?

1. A.Mitochondria, Cell membrane, Cell wall, Cytoplasm
2. B.Chloroplasts, Cytoplasm, Vacuole, Nucleus
3. C.Nucleus, Cell membrane, Mitochondria, Cytoplasm
4. D.Vacuole, Cell membrane, Nucleus, Mitochondria

Which one among the following statements is correct? In digestive system of living organisms

1. A.glucose is broken down into glycerol
2. B.glucose is converted into glycogen
3. C.glucose is broken down into carbon dioxide and water
4. D.proteins are broken down into amino acids

Match List I with List II and select the correct answer using the code given below the Lists : | List I *(Compound)* | List II *(Use)* | | :--- | :--- | | A. Cellulose nitrate | 1. Soft soap | | B. Potassium sulphate | 2. Gun powder | | C. Potassium salt of fatty acids | 3. Fertilizer | | D. Calcium oxide | 4. Glass | Code :

1. A.2 3 1 4
2. B.2 1 3 4
3. C.4 1 3 2
4. D.4 3 1 2

Which one among the following is an electrochemical cell that cannot be charged ?

1. A.Electrolytic cell
2. B.Storage cell
3. C.Primary cell
4. D.Fuel cell

Which one among the following nutrients is a structural component of the cell wall of plants?

1. A.Manganese
2. B.Potassium
3. C.Phosphorus
4. D.Calcium

Balanced diet should have approximately

1. A.1/5 protein, 3/5 fat and 1/5 carbohydrate
2. B.3/5 protein, 1/5 fat and 1/5 carbohydrate
3. C.1/5 protein, 1/5 fat and 3/5 carbohydrate
4. D.1/2 protein, 1/4 fat and 1/4 carbohydrate