Biology · NDA previous year questions

Which one of the following devices changes low voltage alternating current to high voltage alternating current and vice versa ?

1. A.Generator
2. B.Motor
3. C.Transformer
4. D.Vibrator

Match List I with List II and select the correct answer using the code given below the Lists : | List I (Disease) | List II (Remedy) | | :--- | :--- | | A. Hypermetropia | 1. Concave lens | | B. Presbyopia | 2. Bifocal lens | | C. Myopia | 3. Surgery | | D. Cataract | 4. Convex lens | Code : A B C D

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

Colour vision in human eyes is the function of photoreceptor cells named

1. A.Rods
2. B.Cones
3. C.Blind spot
4. D.Fovea

A homogeneous mixture contains two liquids. How are they separated ?

1. A.By filtration
2. B.By evaporation
3. C.By distillation
4. D.By condensation

Cell wall of any fungus is different from plants in having

1. A.cellulose
2. B.chitin
3. C.cholesterol
4. D.glycogen

Sleeping sickness is a parasitic disease of humans and other animals. It is caused by

1. A.Histomonas
2. B.Trypanosoma
3. C.Angomonae
4. D.Naegleria

Dengue virus causes high fever, rashes and reduces the number of a particular type of blood cells. Those blood cells are

1. A.Monocytes
2. B.Platelets
3. C.Eosinophils
4. D.Neutrophils

Kidney secretes an enzyme, which changes plasma protein angiotensinogen into angiotensin. The enzyme is

1. A.Renin
2. B.Nitrogenase
3. C.Hydrolase
4. D.Mono-oxygenase

Red blood cells (RBCs) have

1. A.no nucleus, no mitochondria and no endoplasmic reticulum
2. B.nucleus, mitochondria and endoplasmic reticulum
3. C.nucleus, mitochondria but no endoplasmic reticulum
4. D.no mitochondria but endoplasmic reticulum is present

Which one of the following statements is NOT correct ?

1. A.All proteins are enzymes
2. B.Mostly enzymes are proteins
3. C.All fats are energy rich compounds
4. D.Glucose is a common carbohydrate

The colourful part of the Sunflower or Marigold plant is

1. A.Flower
2. B.Inflorescence
3. C.Fruit
4. D.Seed

Which one of the following statements is not correct?

1. A.Pitch of a sound is its characteristic by which we can generally differentiate between a male voice and a female voice
2. B.The loudness of sound is related to its frequency
3. C.A musical sound has certain well defined frequencies which are generally harmonics of a fundamental frequency
4. D.The timbre of a particular musical sound is related to the waveform of the sound wave

Fluoride toothpaste is sometimes recommended because fluoride

1. A.prevents plaque formation
2. B.hardens the enamel of the tooth
3. C.kills pathogenic bacteria
4. D.prevents tooth ache

If one mixes up ashes with animal fat, the substance received in the crude form is called

1. A.Pheromone
2. B.Soap
3. C.Cement
4. D.Concrete

The genetic material of bacteria is found in

1. A.nucleus
2. B.cytoplasm
3. C.cell membrane
4. D.ribosome

A horse and a donkey can breed to produce mule which is an infertile animal. The infertility is because horse and donkey belong to different

1. A.class
2. B.order
3. C.species
4. D.genus

A plant having yellow leaves with dead spots has the deficiency of

1. A.Potassium
2. B.Magnesium
3. C.Nitrate
4. D.Phosphate

Consider the following statements about cactus : 1. The leaves are reduced to spines. 2. The stem does the photosynthesis. Which of the statements given above is/are correct?

1. A.1 only
2. B.2 only
3. C.Both 1 and 2
4. D.Neither 1 nor 2

In which one of the following, methanogens, i.e., methane producing bacteria are not present?

1. A.Rumen of cattle
2. B.Aerobic environment
3. C.Anaerobic sludge
4. D.Excreta of cattle

Malarial parasite is a

1. A.bacteria
2. B.protozoa
3. C.virus
4. D.fungus

It is difficult to kill viruses because they

1. A.consist of tough protein coat
2. B.are very small in size
3. C.lack cellular structure
4. D.spend a lot of time inside the host’s cells

Statement I : Too much salt content in diet could be one of the reasons for kidney failure. Statement II : High salt may cause high blood pressure.

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

To prevent heart problems, blood of a normal healthy person should have 1. low cholesterol level. 2. high HDL level. 3. high VLDL level. 4. high LDL level. Select the correct answer using the code given below :

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

Which of the following pairs of vector and disease is/are correctly matched ? $$\begin{array}{llll}& \text{Vector}& & \text{Disease}\\ 1.& \text{Anopheles}& :& \text{Malaria}\\ 2.& \text{Aedes aegypti}& :& \text{Chikungunya}\\ 3.& \text{Tsetse fly}& :& \text{Filariasis}\\ 4.& \text{Bed bugs}& :& \text{Sleeping sickness}\end{array}$$ Select the correct answer using the code given below :

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

Which of the following statements about DNA is/are correct ? 1. DNA is the hereditary material of all living organisms. 2. All segments of DNA code for synthesis of proteins. 3. Nuclear DNA is double helical with two nucleotide chains which run anti-parallel. 4. DNA is also found in mitochondria. Select the correct answer using the code given below :

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