NSMQ2025 Preliminary Stage Sample Past Questions and Answers: SET 03

Preamble: Explain the given term clearly as used in biology.

1. Classification

Ans: It is the placement of organisms into groups according to their similarities in structure, physiological processes, and ancestry.

2. Taxonomic hierarchy

Ans: Taxonomic hierarchy is an ordered group of taxonomic ranks used to classify organisms from the general to the specific.

3. Binomial Nomenclature of Organisms.

Ans: It’s a system of naming organisms where they are given two parts or two names. So, the first part of the name represents the genus, while the second part refers to the specific epithet.

Preamble: Determine the empirical formula of a compound with a given composition by mass.

4. 0% carbon, 8.4% hydrogen, and 66.6% oxygen.

Ans: CH₄O₂.

5. 6% nitrogen, 8.9% hydrogen, and 70.5% oxygen

Ans: NH₆O₃.

6. 4% aluminium, 16.3% carbon, and 65.3% oxygen.

Ans: ALC₂O₆.

Preamble: Indicate the part of mammals to which the given description refers.

7. The space found within a skull, which is occupied by the brain.

Ans: Cranial cavity.

8. A central compartment within the upper part of the torso enclosed by the ribs, the vertebral column, and the sternum.

Ans: The thoracic cavity.

9. The thoracic region provides structural support and protection for vital organs such as the heart and lungs.

Ans: The rib cage.

Preamble: Find as a rational number the sum of the given infinite series.

10. 1 + 0.1 + 0.01 + 0.001 . . ..

Ans: 10/9

11. 20 – 2 + 0.2 – 0.02 + 0.002 – . . . . . .

Ans: 200/11

12. 10 + 2 + 0.4 + 0.08 + ………….

Ans: 25/2

13. What is the shape of the DNA molecule?

Ans: Double helix

14. What name is given to a mitochondrion without an outer membrane?

Ans: Mitoplast.

15. Find the total surface area of a cube if its volume is 729 cm³.

Ans: 486 cm².

16. Evaluate the definite integral of the expression 3x² – 4x + 2 as x moves from 0 to 2.

Ans: 4

17. Find the change in kinetic energy of an object that moves 5m in the direction of a 4N net force acting on it.

Ans: 20 J

18. A 50-ohm resistor and a 25-ohm resistor are connected in parallel. Find the current in the 50-ohm resistor when a 0.2 ampere current flows through the 25-ohm resistor.

Ans: 0.1 ampere

19. Determine the half-life of a 12.0-gram sample of a radioactive isotope if it decays to 0.375 grams in 6.00 hours.

Ans: 1.20 hours.

TRUE/FALSE

Preamble: The electrical resistance of a steel wire near room temperature.

20. Is independent of temperature.

Ans: False

21. Decreases as the temperature decreases.

Ans: True

22. Decreases as temperature increases.

Ans: False

Preamble: The given geometric figure has a center of symmetry.

23. An equilateral parallelogram.

Ans: True,

24. An isosceles triangle.

Ans: False,

25. An isosceles trapezium.

Ans: False

26. Compounds can be broken down into simpler substances by physical means.

Ans: False

27. Mixtures can always be separated into their components by physical methods.

Ans: True

28. An element is made up of only one type of atom.

Ans: True

29. The members of Rhodophyta are not always red in colour.

Ans: True

30. Red algae can be unicellular or multicellular.

Ans: True

31. Pit connections and pit plugs are unique features of red algae.

Ans: True

32. The kinetic energy of a projectile vanishes at the highest point on its trajectory.

Ans: False

33. The total energy of a projectile consists entirely of potential energy at the highest point on its trajectory.

Ans: False

34. The vertical component of the velocity of a projectile vanishes at the highest point on its trajectory.

Ans: True

35. The number of babies born in a hospital in a day is a discrete variable.

Ans: True

36. The weight of a newborn baby is a discrete variable.

Ans: False

37. The height of a student in a class is a discrete variable.

Ans: False

38. The pH of an aqueous solution of a basic salt is always greater than seven.

Ans: True

39. The aqueous solution of pure sodium chloride is always neutral at STP.

Ans: True

40. An aqueous solution of potassium carbonate is always basic.

Ans: True

41. Phagocytosis occurs through the formation of small active invaginations in the cell membranes.

Ans: False

42. Phagocytosis plays a critical role in the immune system.

Ans: True

43. During phagocytosis, big solid particles are ingested, which are then broken down by lysosomal enzymes.

Ans: True

Source: Galmeek.com

Stay connect By Joining Our WhatsApp Channel for Prompt Updates

---

Follow to join the WhatsApp Channel.

Telegram Channel.