Biology · NDA previous year questions

One advantage of sexual reproduction over asexual reproduction is that it helps species to survive over long evolutionary time. This is because sexual reproduction produces :

1. A.more offspring in each reproductive cycle.
2. B.robust and healthy offspring.
3. C.genetically similar offspring.
4. D.more variation in offspring.

Which one of the following structures or components is not always present in living cells?

1. A.Cell wall
2. B.Plasma membrane
3. C.Cytoplasm
4. D.Genetic material

Which one of the following statements about X-rays is not true?

1. A.They have wavelengths of about 1 Å.
2. B.These can be generated by bombarding a metal target by high energy electrons.
3. C.Due to their wavelengths being shorter, these can be used for radar systems.
4. D.These are also used for the treatment of certain forms of cancer.

Organisms capable of using $\mathrm{C}{\mathrm{O}}_2$ as principal carbon source are called:

1. A.Autotrophs
2. B.Heterotrophs
3. C.Parasites
4. D.Decomposers

When yeast cells are ${\mathrm{O}}_2$ starved, fermentation serves as the source of energy. This results in the production of:

1. A.$\mathrm{ATP}+\mathrm{C}{\mathrm{O}}_2+\text{Ethanol}$
2. B.$\mathrm{ATP}+{\mathrm{O}}_2+\text{Pyruvate}$
3. C.$\mathrm{ATP}+\mathrm{C}{\mathrm{O}}_2+\text{Lactic acid}$
4. D.$\mathrm{ATP}+{\mathrm{O}}_2+\text{Acetaldehyde}$

During a laboratory experiment, a student immerses epidermal leaf peel in a hypertonic solution. After some time, the student examined the cells under a microscope and observed that:

1. A.the cells swelled.
2. B.the cells were plasmolysed.
3. C.the cells built up turgor pressure.
4. D.the cells size was unaffected.

Which one of the following is not a characteristic feature of fungi?

1. A.Cell wall is made of chitin
2. B.Filamentous mycelium is present
3. C.Can carry out photosynthesis
4. D.Asexual spores are produced

Which one of the following statements about bryophytes is not correct?

1. A.The plant body is a gametophyte.
2. B.They are also called the amphibians of plant kingdom.
3. C.The plant body is attached to the substratum by rhizoids.
4. D.Specialized water-conducting tissues are present.

An electric bulb is connected to 220 V generator. The current drawn is 600 mA. What is the power of the bulb?

1. A.132 W
2. B.13.2 W
3. C.1320 W
4. D.13200 W

The transfer of electrical signals by nerve cells in human body is enabled by

1. A.sodium
2. B.potassium
3. C.iron
4. D.sodium and potassium

Which one of the following hormones increases the heartbeat in mammals?

1. A.Insulin
2. B.Melatonin
3. C.Thyroxine
4. D.Adrenaline

Which one of the following statements about animal cells and plant cells is correct?

1. A.Animal cells have only cell membrane not cell wall, whereas plant cells have only cell wall not cell membrane.
2. B.Animal cells have only cell membrane not cell wall, but plant cells have both.
3. C.Both animal and plant cells have cell membrane and cell wall.
4. D.Only some cells of animals have cell wall and all plant cells have cell membrane.

Lymph is a tissue fluid present in intercellular spaces. It resembles to

1. A.digestive juice
2. B.cytoplasmic fluid
3. C.urine
4. D.plasma

A DC generator works on the principle of

1. A.Ohm’s law
2. B.Joule’s law of heating
3. C.Faraday’s laws of electromagnetic induction
4. D.None of the above

The protein-digesting enzyme secreted by the stomach wall in case of mammals is called

1. A.chitinase
2. B.amylase
3. C.pepsin
4. D.trypsin

Which one of the following will be resulted when an animal cell is surrounded by a medium with lower concentration of water?

1. A.Cell will lose water
2. B.No change in movement of water
3. C.Cell will gain water
4. D.Cell will swell up

The digestive enzymes are present in

1. A.mitochondria
2. B.vacuoles
3. C.lysosomes
4. D.ribosomes

In which one of the following devices, the light energy is converted into the electrical energy?

1. A.Light-emitting diode
2. B.Laser diode
3. C.Solar cell
4. D.Transistor

Which one of the following plant plastids stores starch, oil and protein granules?

1. A.Chloroplast
2. B.Leucoplast
3. C.Chromoplast
4. D.Xanthoplast

Which one of the following statements about vacuoles' is not correct?

1. A.In plants, there is a large central vacuole that may occupy 90% of total cell volume.
2. B.In plant cells, vacuoles provide turgidity and rigidity.
3. C.In Amoeba, vacuoles have role in nutrition.
4. D.Vacuoles are absent in animal cells.

In aquatic plants, large air sacs give them buoyancy effects. These sacs are surrounded by which one of the following types of tissues?

1. A.Parenchyma
2. B.Collenchyma
3. C.Sclerenchyma
4. D.Complex tissue

Which one of the following groups is called 'amphibians of plant kingdom'?

1. A.Bryophytes
2. B.Thallophytes
3. C.Pteridophytes
4. D.Gymnosperms

Which one of the following is caused by a bacterial pathogen?

1. A.AIDS
2. B.Dengue fever
3. C.COVID-19
4. D.Typhoid fever

Which one of the following statements is not correct?

1. A.Most carbon compounds are good conductors of electricity.
2. B.Bonding in organic compounds is covalent.
3. C.Graphite is used as a lubricant.
4. D.Diamond is an allotrope of carbon.

Which one of the following plants has unisexual flowers?

1. A.Papaya
2. B.Hibiscus
3. C.Mustard
4. D.Sunflower