Tag Archives: NUST NET Past Papers

BIOLOGICAL MOLECULES

QUESTION:

What is the difference between the two types of strach, amylose and amylopectin?

OPTIONS:

  • Amylose starches have unbranched chains of glucose and amylopectin starches have branched chains.
  • Amylose starches are soluble in hot water and amylopectin starches are insoluble.
  • Amylose starches have chains of glucose and amylopectin starches have chains of fructose.
  • Both A and B.

CORRECT OPTION:

Both A and B

EXPLANATION:

Both A and B are correct. Primary difference between the two types of starches is the branching of chains and solubility in hot water.

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ATOMIC STRUCTURE

QUESTION:

Which type of atomic spectrum is given in the following diagram?

OPTIONS:

  • Atomic Emission spectrum
  • Atomic absorption spectrum
  • Continuous spectrum
  • None of these

CORRECT OPTION:

Atomic absorption spectrum

EXPLANATION:

An atomic absorption spectrum is given in the above diagram because it gives black lines with a bright background. An absorption spectrum occurs when light passes through a cold, dilute gas and atoms in the gas absorb at characteristic frequencies; since the re-emitted light is unlikely to be emitted in the same direction as the absorbed photon, this gives rise to dark lines (absence of light) in the spectrum.

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MATRICES & DETERMINANTS

QUESTION:

OPTIONS:

  • 0
  • 1
  • 100
  • -100

CORRECT OPTION:

0

EXPLANATION:

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Cell Biology

QUESTION:

Which of the following is the function of lysosomes?

OPTIONS:

  • Phagocytosis
  • Autophagy
  • Enzyme secretion for extracellular digestion
  • All of the above

CORRECT OPTION:

All of the above

EXPLANATION:

Lysosomes performs all these functions.

Phagocytosis is eating process of a cell.

Autophagy is self-eating of worn out parts of the cell e.g mitochondria.

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Gases, Liquids & Solids

QUESTION:

The figure below shows the crystalline structure for which of the following?

OPTIONS:

  • NaCl
  • Diamond
  • Copper
  • Iodine

CORRECT OPTION:

Iodine

EXPLANATION:

As molecules are packed in the crystalline structure, so it must be a crystal for a molecular solid. Amongst the given list only iodine is a molecular solid.

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Sets & Functions

QUESTION:

The set of fourth roots of unity are closed with respect to?

OPTIONS:

  • Addition
  • Division
  • Subtraction
  • None of the above

CORRECT OPTION:

Division

EXPLANATION:

Set = {1,-1,i,-i}

Addition: 1 + i is not part of the set;

Subtraction: 1 – i is not part of the set;

Any division operation in the set results in an element which is part of the set. E.g. 1/i = i/i2 = -i. Hence it is closed w.r.t division;

Remember that set of fourth roots of unit are closed w.r.t multiplication and division.

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Number Systems

QUESTION:

Which of the following numbers lie on the imaginary axis of the Argand diagram?

  • 8 + 3i
  • 0 +3i
  • 8 + 0i
  • None of the above

CORRECT OPTION:

0 + 3i

EXPLANATION:

Only B has no real part so its lies on the imaginary axis of the Argand diagram.

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INTRODUCTION TO BIOLOGY

QUESTION:

Morphology is a sub-branch of which of the following?

  • Social biology
  • Biotechnology
  • Microbiology
  • Human biology

CORRECT OPTION:

Human Biology

EXPLANATION:

Human biology includes anatomy, morphology, evolution, genetics, cell biology and ecological study of human beings.

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BASICS OF CHEMISTRY

QUESTION:

Non-stoichiometric compounds are formed by:

  • Only alkali metals
  • Only transition elements
  • Only noble gases
  • None of the above

CORRECT OPTION:

Only transition elements

EXPLANATION:

Binary transition metal compounds, such as the oxides and sulfides, are usually written with idealized stoichiometry’s, such as FeO or FeS but these compounds are usually cation deficient and mostly never contain a 1:1 cation:anion ratio. Thus a substance such as ferrous oxide is actually a nonstoichiometric compound with a range of compositions.

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NUST NET SAMPLE QUESTIONS

National University of Sciences and Technology (NUST) is ranked among top engineering universities of Pakistan. NUST was established in 1991, they have many campuses in different cities but their main campus is in Islamabad. NUST was established with a goal of providing quality education to its students and to create better carrier opportunities for them so that they can succeed in their lives. Nust mainly focus on quality education that’s why their fee is quite high but they facilitate poor and needy students through need base scholarship. NUST NET registration is open now and entry test will start from 28th Dec 2018. NUST has earned his status in a very short period of time through their dedication and hard work.

 

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