Previous year MCQs

General science UPPSC 2013 GS-I
Question

Refrigeration helps in food preservation by

Answer & Solution

Answer: (Detailed Solution Below)

Option B: reducing the rate of biochemical reaction

Detailed Solution:

The correct answer is “reducing the rate of biochemical reaction”.
Food preservation by refrigeration reduces biochemical reactions.

Similar Questions:

When soggy biscuits are kept inside the fridge for sometime they become crisp because
  1. A) cooling releases extra moisture
  2. B) humidity inside the fridge is low and extra moisture is absorbed
  3. C) humidity inside the fridge is high and extra, moisture is absorbed
  4. D) pressure inside the fridge is high and helps in releasing extra moisture.
Which of the following is associated with biological nitrogen fixation ?
  1. A) Red Algae
  2. B) Brown Algae
  3. C) Green Algae
  4. D) Blue-Green Algae
When doctor tells a person that he/she has been affected with tetraplegia, it means that he/she is suffering from paralysis of:
  1. A) right hand only
  2. B) left hand only
  3. C) his both legs only
  4. D) both hands and both legs
Match list-I with list-II and select the correct answer using the code given below the lists:
List-I (molecules) - List-II (elements present)

A. Vitamin B12 - 1. Magnesium
B. Haemoglobin - 2. Cobalt
C. Chlorophyll - 3. Copper
D. Brass - 4. Iron

Code:
A B C D
  1. A) 2 4 1 3
  2. B) 2 1 3 4
  3. C) 4 1 2 3
  4. D) 3 4 2 1
In cold countries alcohol is preferred to mercury as a thermometric liquid because:
  1. A) alcohol has a lower freezing point
  2. B) alcohol is a better conductor of heat
  3. C) alcohol is cheaper than mercury
  4. D) the world production of alcohol is greater than that of mercury
Refrigeration helps in food preservation by
  1. A) killing of germs (bacteria)
  2. B) reducing the rate of biochemical reaction
  3. C) destroying the enzyme action
  4. D) sealing food with a layer of ice
The age of the tree can be determined from the
  1. A) Counting of leaves on the tree
  2. B) Counting the number of rings on its stem
  3. C) Counting the branches on the tree
  4. D) Measurement of its height
What is the function of a pace maker?
  1. A) It regulates the heart beat
  2. B) It increases the heart beat
  3. C) It accelerates blood supply to heart
  4. D) It decreases the heart beat
Expansion during heating
  1. A) Occurs only in solid
  2. B) Increases the weight of the material
  3. C) Decreases the density of the material
  4. D) Occurs at the same rate for all liquids and solids
"Ringelmann scale" is used to measure density of ?
  1. A) Smoke
  2. B) Polluted water
  3. C) Fog
  4. D) Noise
The Chinese writers mention India by the name of
  1. A) Fo-Kwo-ki
  2. B) Yin-tu
  3. C) Si-Yu-Ki
  4. D) Sikia-Pono
Which one of the following organic acids is abundant in grapes, tamarind (इमली) and banana?
  1. A) Acetic acid
  2. B) Citric acid
  3. C) Lactic acid
  4. D) Tartaric acid