11. During crossing over the breakage of chromatids and fusion of broken segments take place due to the action of
12. Match List-I (RNA polymerase parts) with List-II (Functions) and select the correct answer:
List-I
List-II
a. Sigma factor
1. Ineffective in transcribing RNA, because it transcribes both strands
b. The core enzyme
2. Transcribes only one strand of the DNA template
c. The holozyme
3. Interacts with the core enzyme to form the complete enzyme
d. The β-subunit
4. Required for the interaction with the sigma factor
| List-I | List-II |
| a. Sigma factor | 1. Ineffective in transcribing RNA, because it transcribes both strands |
| b. The core enzyme | 2. Transcribes only one strand of the DNA template |
| c. The holozyme | 3. Interacts with the core enzyme to form the complete enzyme |
| d. The β-subunit | 4. Required for the interaction with the sigma factor |
13. Which of the following properties of protenoid micro spheres have revealed concentric double layered boundaries around them through which diffusion of material from the interior to the exterior occurs?
14. According to the theory of abiogenesis, the coacervates turned into the first primitive living systems called
15. According to which of the following theories, "the different stages in the development of an individual represent the different stages through which the race passed in the process of evolution"?
16. The plant in which foreign gene (s) has / have been introduced is called
17. Which of the following is actually a giant palindrome with its two halves virtually identical?
18. Match the following columns:
Column I
Column II
a. Non-parental gene exchange
1. Crossing over
b. Non-sister chromatids
2. X and Y
c. Sex chromosome
3. Sex-linked disease
d. Haemophilia
4. Recombination
| Column I | Column II |
| a. Non-parental gene exchange | 1. Crossing over |
| b. Non-sister chromatids | 2. X and Y |
| c. Sex chromosome | 3. Sex-linked disease |
| d. Haemophilia | 4. Recombination |
19. A normal woman whose father was colourblind, is married to a normal man. The sons would be
20. Biological concept of species is mainly based on
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