Ernest Chain and Howard Florey's contribution was
discovery of streptokinase
establishing the potential of penicillin as an effective antibiotic
discovery of the DNA sequencer
isolating the bacterial plasmid
isolating the bacterial plasmid
B.
establishing the potential of penicillin as an effective antibiotic
Pencillin was the first antibiotic to be discovered by Alexander Fleming in 1928. The antibiotic was however, commerically extracted by efforts of Chain and Florey and was extensively used in treating wounded soldiers in World War II. Fleming, Chain and Florey were awarded Noble Prize in 1945.
The semi dwarf wheat which was instrumental in increasing
wheat production was developed by
Alexander von Humboldt
Paul Ehrlich
Dr. Kurien
Edward Jenner
Edward Jenner
Viruses of the genus Nucleopolyhedrovirus are employed as
Gobar gas producers
Biological control agents
Anaerobic sludge digesters
Antibiotics
Antibiotics
The graphical representation to calculate the probability of all possible genotypes of offsprings in a genetic cross was developed by
Gregor Mendel
Kornberg
Har Gobind Khorana
George Gamow
George Gamow
Match Column I with Column II and choose the right option.
| Column I | Column II |
| 1. Thomas Malthus | A. Branching descent |
| 2. Hugo deVries | B. Studies on populations |
| 3. Charles Darwin | C. Use and disuse theory |
| 4. Lamarck | D. Saltation |
1 - D; 2 - A; 3 - C; 4 - B
1 - B; 2 - D; 3 - A; 4 - C
1 - B; 2 - D; 3 - C; 4 - A
1 - C; 2 - B; 3 - A; 4 - D
1 - C; 2 - B; 3 - A; 4 - D
Choose the wrong statement
Failure of segregation of chromatids during cell division results in aneuploidy
Additional copy of 'X' chromosome in males results in Klinefelter's syndrome
Closely located genes in a chromosome always assert independently resulting in recombinants
According to Mendel, recessive character never blend in heterozygous condition
According to Mendel, recessive character never blend in heterozygous condition
Match Column I with Column II and choose the correct option.
| Column I | Column II |
| 1. Totipotency | A. breeding crops with higher levels of nutrients |
| 2. Micropropagation | B. plant grown from hybrid protoplast |
| 3. Somaclone | C. producing a large number of plants through tissue culture |
| 4. Somatic hybrid | D. capacity to generate a whole plant from an explan |
| 5. Biofortification | E. Plants genetically identical to the original plant |
1 - D; 2 - C; 3 - E; 4 - B; 5 - A
1 - A; 2 - E; 3 - B; 4 - D; 5 - C
1 - C; 2 - B; 3 - E; 4 - D; 5 - A
1 - D; 2 - E; 3 - A; 4 - D; 5 - C
1 - D; 2 - E; 3 - A; 4 - D; 5 - C
Choose the wrong statement
Louis Pasteur demonstrated that life comes only from pre-existing life
S.L. Miller observed that electric discharge in a flask containing CH4, H2, NH3 and water vapour at 800°C formed amino acids
Flippers of penguins and dolphins are examples for homology
Homology indicates common ancestry
Homology indicates common ancestry
The hominid fossils discovered in Java in 1891 revealed a stage in the human evolution, which was called
Homo erectus
Dryopithecus
Australopithecus
Homo habilis
Homo habilis
Multiple allelism is observed in
flower colour in Snapdragon
pod colour in Pisum sativum
haemophilia in man
sex determination in birds
sex determination in birds
