Biology · NDA previous year questions

Which one of the following is the correct sequence in increasing complexity?

1. A.Protein - Organism - Tissue - Organ
2. B.Protein - Organ - Tissue - Organism
3. C.Protein - Organism - Organ - Tissue
4. D.Protein - Tissue - Organ - Organism

Consider the following cell types : 1. Monocyte 2. Chondrocyte 3. Basophil 4. Lymphocyte How many of the above belong to animal cell types?

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

Consider the following statements : 1. DNA replication takes place when chromatin is opened up. 2. Chromatin organises itself into rod-shaped chromosomes before cell division. 3. Both prokaryotes and eukaryotes have the same process for cell division. Which of the statements given above is/are correct?

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

Human body works in the pH range of :

1. A.6.8 - 7.2
2. B.7.0 - 7.8
3. C.6.5 - 7.5
4. D.7.5 - 8.0

Soap with water forms :

1. A.Metallotropic liquid crystal
2. B.Thermotropic liquid crystal
3. C.Homogeneous solution
4. D.Lyotropic liquid crystal

Leaves of most plants appear green because the chlorophyll present in it :

1. A.absorbs red and blue light while reflecting green light.
2. B.absorbs green light only.
3. C.absorbs green light while reflecting red and blue light.
4. D.reflects red light and absorbs blue and green light.

Bacterial DNA is referred to as naked because it is not associated with:

1. A.any scaffold
2. B.proteins
3. C.ribozymes
4. D.plasmid

Which one among the following cells produces antibodies against a foreign antigen?

1. A.Lymphocytes
2. B.Erythrocytes
3. C.Eosinophils
4. D.Platelets

LIGO experiment confirmed one of the predictions of :

1. A.String theory
2. B.Special theory of relativity
3. C.Quantum mechanics
4. D.General theory of relativity

The green plants in a terrestrial eco-system absorbs sunlight that falls on their leaves and convert it into food energy. The percentage of solar radiation absorbed by all green plants for the process of photosynthesis is about

1. A.1%
2. B.5%
3. C.8%
4. D.10%

The two important features of sexual reproduction in higher organisms that create genetic diversity in offspring are

1. A.Mitosis and fertilization
2. B.Meiosis and fertilization
3. C.Mitosis and binary fission
4. D.Meiosis and conjugation

Eukaryotic cells are much more complex as compared to prokaryotes. Which one of the following structures is exclusively present in a eukaryotic cell?

1. A.Cell wall
2. B.Plasma membrane
3. C.Nucleic acid
4. D.Mitochondria

An important cause of tooth decay by the bacterium Streptococcus mutans is because of their ability to attach to teeth surface by producing slime layer from

1. A.Sugar
2. B.Alcohol
3. C.Saliva
4. D.Teichoic acid

In angiosperms, pollen grain germinates to produce two male gametes. Which one of the following functions is carried out by these gametes?

1. A.Both the gametes fuse with a single egg cell
2. B.Both the gametes fuse with two different egg cells
3. C.One gamete fuses with the egg cell and the other one eventually degenerate
4. D.One gamete fuses with the egg cell and the other one fuses with a diploid secondary nucleus

In a sexually reproducing organism, which one of the following statements is appropriate both for the parent and offspring?

1. A.Chromosome number increases but DNA content remains constant
2. B.Both chromosome number and DNA content remains constant
3. C.Chromosome number decreases but DNA content remains constant
4. D.Both chromosome number and DNA content decreases

Ms. Rani decides to convert her AC generator into a DC generator. Which one of the following she would need to use?

1. A.A split-ring type commutator
2. B.Slip rings and brushes
3. C.A stronger magnetic field
4. D.A rectangular wire loop

Which one of the following is NOT an example of organic compound?

1. A.Ammonium cyanate
2. B.Marsh gas
3. C.Urea
4. D.Cane sugar

Match List I with List II and select the correct answer using the code given below the Lists: $$\begin{array}{llll}\text{LIST I}& & \text{LIST II}& \\ \text{(Process)}& & \text{(Separation method)}& \\ \text{A.}& \text{Separation of acetone and water from their mixture}& 1.& \text{Chromatography}\\ \text{B.}& \text{Separation of water and kerosene oil from their mixture}& 2.& \text{Centrifugation}\\ \text{C.}& \text{Separation of cream from milk}& 3.& \text{Distillation}\\ \text{D.}& \text{Separation of pigments from plant extract}& 4.& \text{Separating Funnel}\end{array}$$

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

Which one of the following is NOT a requirement for photosynthesis?

1. A.Chlorophyll
2. B.CO
3. C.Water
4. D.O

In flowering plants, DNA content of the parent plant gets halved during

1. A.Seed germination
2. B.Fruit formation
3. C.Flower bud formation
4. D.Pollen formation

Which one of the following combina- tions of events represents the correct sequence during reproduction in flowering plants?

1. A.Ovule → fruit; egg → embryo; zygote → seed; ovary → egg
2. B.Embryo→ egg; ovary→ fruit; ovule → zygote; zygote → seed
3. C.Ovary → fruit; zygote → egg; embryo → ovule; seed→ fruit
4. D.Egg → zygote; zygote→ embryo; ovule → seed; ovary → fruit

Which among the following statements with respect to carbon is/are correct? 1. Carbon forms the basis for all living organisms and many things we use 2. Carbon shows tetra-valency and the property of catenation 3. Carbon forms covalent bonds with itself and other elements 4. Carbon forms compounds containing triple and tetra bonds between carbon atoms Select the correct answer using the code given below:

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

Consider the following statements regarding cell wall composition : 1. Bacterial cell wall is made of peptidoglycan. 2. Fungal cell wall is made of cellulose. 3. Animals lack cell wall and have extracellular matrix made up of sugar and proteins. Select the correct answer using the code given below:

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

Which one of the following structures is not present in a prokaryotic cell?

1. A.Cell wall
2. B.Ribosomes
3. C.Nucleus
4. D.Plasma membrane

In a plant cell, which one of the following contains their own DNA?

1. A.Nucleus and Endoplasmic Reticulum
2. B.Ribosome and Golgi apparatus
3. C.Mitochondria and Chloroplast
4. D.Chloroplast and Vacuoles