AIPMT Biology Previous Questions and Answers

1. According to Oparin, which one of the following was not present in the primitive atmosphere of the earth (AIPMT, 2004)
origin of life
a) oxygen 
b) methane 
c) hygrogen 
d) water vapours

2. Which one of the following is not correctly matched?
a) Streptomyces - Antibiotic 

b) Serratia - Drug selection 
c) Spirulina- Single cell protein 
d) Rhizobium - Biofertilizer

3. When a fresh water protozoan possessing a contractile vacuole is placed in a glass containing marine water, the vacuole will
a) increase in number 

b) increase in size 
c) Disappear 
d) Decrease in size

4. Angiosperm have dominated the land flora primarily because of their
a) domestication by man 

b) nature of self pollination  
c) property of producing number of seeds 
d) power of adaptability to diverse habitats

5. In arthropoda, head and thorax are often used to form cephalothorax but in which one of the following classes is the body divided into head, thorax and abdomen
a) Insecta  
b) Myriapoda 
c) Crustacea 
d) Arachnida and Crustacea

6. One of the following is a very unique feature of mammalian body
a) Homeothermy 

b) Rib cage 
c) Presence of diaphragm  
d) Four chambered heart

7. The telomeres of eukaryotic chromosomes consists of a short sequence of
a) Thymine rich repeats 

b) Cytosine rich repeats  
c) Guanine rich repeats 
d) Adenine rich repeats

8. A nutritionally wild type organism which does not require any additional growth supplement is known as
a) phenotype 
b) autotroph 
c) holotype 
d) prototroph

9. The Ti plasmid is often used for making transgenic plants. The plasmid is found in
a) Azotobacter 
b) Rhizopium roots of leguminous plants 
c) Yeast 
d) Agrobacterium

10. The most likely reason for development of resistance against pesticides in insect in insect damaging a crop is
a) random mutations 

b) acquired heritable changes 
c) direct mutations 
d) genetic recombinations
Learn more:

1.a) oxygen
2. b) Serratia - Drug selection
3. c) Disappear
4. d) power of adaptability to diverse habitats
5. a) Insecta
6. c) Presence of diaphragm
7. c) Guanine rich repeats

8. d) prototroph
9. d) Agrobacterium
10. a) random mutations
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