Please select a subject first
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All are forms of vaccines, EXCEPT ______.
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Organisms which require about 300 - 500 ml of water per gm of ammonia for their excretion are ______.
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Which type of immunity is acquired by antigenic stimulus?
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Which cells deliver co-stimulatory signals for helper T-cells?
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On coming in contact with an antigen, a sensitized T-lymphocyte produces ____________.
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What is the site of maturation of B-lymphocytes?
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Study the following statements regarding separation of DNA using agarose gel electrophoresis.
- Large fragments of DNA molecules move faster than small DNA fragments and thus separate faster.
- DNA being negatively charged migrates to cathode.
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______ is a Type I restriction enzyme.
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Apical dominance in plants can be reversed by application of ____________.
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Following are the four statements regarding separation of DNA fragments using Gel electrophoresis. Identify the INCORRECT statements.
i. DNA is negatively charged molecule and so it is loaded on gel towards the Anode terminal.
ii. DNA fragments travel along the surface of the gel whose concentration does not affect movement of DNA.
iii. Smaller the size of DNA fragment, larger is the distance it travels through it.
iv. Pure DNA can be visualized directly by exposing to UV radiation.
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Which of the following is NOT involved in genetic engineering technique?
i. Combining genes from two organisms
ii. Gene cloning
iii. Transfer of lipid molecules
iv. Transfer of genes to new organisms
v. Repairing or replacing the defective genes by healthy genes
vi. Artificial synthesis of new gene
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Deamination leads to the formation of ____________.
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Animals that are uricotelic are usually not ______.
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The mode of excretion observed in spiders is called ____________.
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Identify the CORRECT order of steps in Polymerase Chain Reaction (PCR).
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Match column I with column II and choose the correct option.
| Column I | Column II | ||
| i. | Specificity | a. | Lymphocytes produced against each particular foreign molecule |
| ii. | Diversity | b. | Self-cells are not attacked by immune system of the own body |
| iii. | Memory | c. | Immune system works against multiple pathogens |
| iv. | Discrimination between self and non-self | d. | Stronger immune response on second encounter |
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Water percolates deep in the soil, due to the ____________ is called gravitational water.
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With reference to genetic diversity, all the following are true EXCEPT
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Match the column I (PCR steps) and Column II (Temperature). Select the correct option.
| Column I (PCR steps) | Column II (Temperature) | ||
| i. | Polymerization | P. | 40 - 60°C |
| ii. | Denaturation | Q. | 70 - 75°C |
| iii. | Primer annealing | R. | 90 - 98°C |
| S. | 28 - 37°C |
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