Monthly Archives: January 2019

GASEOUS EXCHANGE

QUESTION:

In fish, gills surface is ventilated by constant flow of?

OPTIONS:

  • Oxygenated blood
  • Air
  • Water
  • Serum

CORRECT OPTION:

Water

EXPLANATION:

Marine species obtain oxygen dissolve in water so gills are constantly ventilated by water to oxygenate the blood.

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REACTION KINETICS

QUESTION:

Some reaction start very slow, but then gain speed and eventually become very fast. These reactions exhibit which phenomena?

OPTIONS:

  • Catalyst activation
  • Catalyst poisoning
  • Inhibition
  • Auto catalysis

CORRECT OPTION:

Auto catalysis

EXPLANATION:

In these reaction product formed acts as a catalyst. That is why they start very slow, but then gain speed (as the product catalyst is available) and eventually become very fast.

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INVERSE TRIGONOMETRIC FUNC

QUESTION:

Value of cos (tan-1 15/8 – sin-1 7/25) =?

OPTIONS:

  • 114/350
  • 297/425
  • 215/345
  • 138/147

CORRECT OPTION:

297/425

EXPLANATION:

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ELECTROSTATICS

QUESTION:

Find the work done in moving a charged particle of 3 micro columb from infinity to a distance of 0.04m to another charged particle of 5 micro columb?

OPTIONS:

  • 1.5 J
  • 2.6 J
  • 3.4 J
  • 4.8 J

CORRECT OPTION:

3.4 J

EXPLANATION:

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CMH Lahore Medical College and Institute of Dentistry Fifth Merit List

National University of Medical Sciences NUMS is a Federal Public Sector University established in 2015. Their vision is to improve the quality of life through education, research, innovation and cost effective quality healthcare for the people of Pakistan. NUMS has announced fifth merit list for MBBS/BDS open merit and foreign seats CMH Lahore. CMH Lahore Fifth Merit List of Foreign Seats/Open merit seats for MBBS and BDS Admissions for 2018-19 session has been announced. In 2018 CMH Lahore merit is bit low as compared to last year, MBBS highest merit is 89.43636364 and lowest merit for MBBS is 87. However in BDS admissions highest merit is 88.78181818 and lowest merit for BDS is 78.73636364.

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Shifa College of Medicine, Islamabad Fourth Merit List

NUMS has announced fourth merit list for Shifa College of Medicine, Islamabad. Shifa College of Medicine was founded in 1998, and they have earned a very good name in very short period of time. Many student from across Pakistan wish to secure admission in this college. As expected their merit is high in fourth merit list as well. Highest aggregate for MBBS is 89.7969697 whereas lowest aggregate is 84.54343434. Every year thousands of students apply for admission from Pakistan as well as from other part of world but very little are able to secure their admission.

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DIGESTION

QUESTION:

Trypsinogin is converted into trypsin by the activity of:

OPTIONS:

  • Goblet cells
  • Absorbtive cells
  • Enteropeptidase
  • Enterokinase

CORRECT OPTION:

Enteropeptidase

EXPLANATION:

Trypsinogen is the precursor form of the pancreatic enzyme trypsin. It is found in pancreatic juice, along with amylase, lipase and chymotrypsinogen. It is activated by enteropeptidase, which is found in the intestinal mucosa, to form trypsin. Once activated, the trypsin can activate more trypsinogen into trypsin. Trypsin cleaves the peptide bond on the carboxyl side of basic amino acids such as arginine and lysine.

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ELECTROCHEMISTRY

QUESTION:

The oxidation of oxygen in peroxides is?

OPTIONS:

  • +1
  • -1
  • +2
  • -2

CORRECT OPTION:

-1

EXPLANATION:

Peroxides include hydrogen peroxide, H2O2. This is an electrically neutral compound and so the sum of the oxidation states of the hydrogen and oxygen must be zero.

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TRIGONOMETRY

QUESTION:

In a triangle ABC, A = 45o, then the value of (1 + cot B)(1 + cot C) is equal to?

OPTIONS:

  • 0
  • 1
  • -1
  • 2

CORRECT OPTION:

2

EXPLANATION:

Easiest way to solve such questions is to assume angles of triangle.

A = 45o

A + B + C = 180o

B + C = 180 – 45o = 135o

Let’s take, B = 90o & C = 45o

= (1 + cot 90o) (1 + cot 45o)

= (1 + 0) (1 + 1)

= 1 x 2 = 2

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HEAT & THERMODYNAMICS

QUESTION:

An ideal gas heat engine operates in a Carnot’s cycle between 227 C and 127 C. It absorbs 6 * 104 heat at high temperature. The amount of heat converted into work is?

OPTIONS:

  • 6 * 104
  • 3 * 104
  • 1.6 * 104
  • 1.2 * 104

CORRECT OPTION:

1.2 * 104

EXPLANATION: 

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