UPSC Prelims -Biology Questions 2013
1. Consider the following animals:
- Sea cow
- Sea horse
- Sea lion
Which of the above is/are mammal/mammals?
(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
2. Consider the following organisms
- Agaricus
- Nostoc
- Spirogyra
Which of the above is/are used as biofertilizer/biofertilizers
(a) 1 and 2
(b) 2 only
(C) 2 and 3
(d) 3 only
3. Consider the following
- Star tortoise
- Monitor lizard
- Pygmy hog
- Spider monkey
Which of the above is found in India?
(a) 1, 2 and 3 only
(b) 2 and 3 only
(c) 1 and 4 only
(d) 1, 2, 3 and 4
4. Fruits stored in a cold chamber exhibit longer storage life because
(a) exposure to sunlight is prevented
(b) concentration dioxide in the is increased of carbon environment
(c) rate of respiration is decreased
(d) there is an increase in humidity
5. Many transplanted seedlings do not grow because
(a) the new soil does not contain favorable minerals
(b) most of the root hairs grip the new soil too hard
(c) most of the root hairs are lost during transplantation
(d) leaves get damaged during transplantation
6. Recombinant DNA technology (Genetic Engineering) allows genes to be transferred
(1) Across different species of plants.
(2) From animals to plants.
(3) From microorganisms to higher organisms.
Select the correct Solution using the codes given below.
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
7. Mycorrhizal biotechnology has been used in rehabilitating degraded sites because mycorrhiza enables the plants to
(1) Resist drought and increase absorptive area
(2) Tolerate extremes of PH
(3) Resist disease infestation
Select the correct Solution using the codes given below:
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
8. Which of the following statement is/ are correct?
1.Viruses lack enzymes necessary for the generation of energy
2. Viruses can be cultured in any synthetic medium
3. Viruses are transmitted from one organism to another by biological vectors only
Select the correct answer using the codes given below.
a) 1 only
b)2 and 3 only
c) 1 and 3 only
d)1,2 and 3
9. Improper handling and storage of cereal grains and oilseeds result in the production of toxins known a s aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by
a) bacteria
b)protozoa
c) moulds
d) viruses
10. Which of the following diseases can be transmitted from one person to another through tattooing?
1. Chikungunya 2. Hepatitis B 3. HIV-AIDS
Select the correct answer using the codes given below.
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1,2 and 3
Learn more:
Answers:
1.(b) 1 and 3 only
2. (b) 2 only
3. (a) 1, 2 and 3 only
4. (c) rate of respiration is decreased
5. (c) most of the root hairs are lost during transplantation
6. (a) 1 only
7. (d) 1, 2 and 3
8. a) 1 only
9.c) moulds
10. b) 2 and 3 only
Answer explanation
1. Sea cow is animal. It is a herbivore and it grows up to 9 meters. Sea horse is a fish and Sea lion is a mammal
3. Star tortoise is found in India in the dry and scrub forests. Pygmy Hog is an endangered species found in Assam, Monitor Lizard is also found in India, and Spider Monkey is tha inhabitants of tropical forests of central and south America.