1. Ozone hole is the largest over
a) Africa
b) Europe
c) America
d) Antarctica
2. Which ecosystem has the maximum biomass?
a) Forest ecosystem
b) Lake ecosystem
c) Grassland ecosystem
d) Pond ecosystem
3. A gene, whose expression helps to identify transformed cell is known as
a) vector
b) plasmid
c) structural gene
d) selectable marker
4. A disease caused by an autosomal primary non-disjuction is
a) Down's syndrome
b) Turner's syndrome
c) Sickle cell anemia
5. Darwin finches are excellent example of
a) connecting links
b) adaptive radiation
c) brood parasitism
d) seasonal migration
6. Malarial fever is caused by a poisonous chemical that causes chills and a high fever that reoccurs every 3-4 days
a) Hirudin
b)Interferon
c) Haemozoin
d) Colosrtum
7. The net electric charge on DNA and histone is
a) positive, negative
b) positive, positive
c) negative, negative
d) negative, positive
8. Analogous organs arise due to
a) divergent evolution
b) genetic drift
c) convergent evolution
d) artificial selection
9. In immune system, interferons are a part of
a) cellular barriers
b)physical barriers
c) cytokine barriers
d) physiological barriers
10. Peripatus is a connecting link between
a) Mollusca and Echinodermata
b) Annelida and Arthropoda
c) Ctenophora and Platyhelminthes
d) Porifera and coeleterata
Answers:
1. d) Antarctica
2. a) Forest ecosystem
3.d) selectable marker
4. a) Down's syndrome
5. b) adaptive radiation
6. c) Haemozoin
7. d) negative, positive
8. c) convergent evolution
9. c) cytokine barriers
10. b) Annelida and Arthropoda