The second stage of hydrosere is occupied by plants like:
1. Typha
2. Salix
3. Vallisneria
4. Azolla
71%
Level 2: 60%+
AIPMT - 2012
Hints
Which one of the following statements is correct with respect to immunity?
| 1. | The antibodies against smallpox pathogens are produced by T-lymphocytes |
| 2. | Antibodies are protein molecules each of which has four light chains |
| 3. | Rejection of a kidney graft is the function of B-lymphocytes |
| 4. | Preformed antibodies need to be injected to treat the bite by a viper snake |
Subtopic: Active & Passive Immunity |
82%
Level 1: 80%+
AIPMT - 2012
Hints
Which one of the following represents a palindromic sequence in DNA?
| 1. | 5'-CCAATG-3' 3'-GAATCC-5' |
2. | 5'-CATTAG-3' 3'-GATAAC-5' |
| 3. | 5'-GATACC-3' 3'-CCTAAG-5' |
4. | 5'-GAATTC-3' 3'-CTTAAG-5' |
Subtopic: Restriction Enzymes - Main Enzymes |
93%
Level 1: 80%+
AIPMT - 2012
Hints
Subtopic: Enzyme Cofactors |
84%
Level 1: 80%+
AIPMT - 2012
Hints
Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labeled A, B, C, and D and select the right option for them:
| Part-A | Part-B | Part-C | Part-D | |
| 1. | Mast cell | Macrophage | Fibroblast | Collagen fibres |
| 2. | Macrophage | Collagen fibres | Fibroblast | Mast cell |
| 3. | Mast cell | Collagen fibres | Fibroblast | Macrophage |
| 4. | Macrophage | Fibroblast | Collagen fibres | Mast cell |
Subtopic: Connective Tissue |
80%
Level 1: 80%+
AIPMT - 2012
Hints
In the five-kingdom classification, Chlamydomonas and Chlorella have been included in:
| 1. | Algae | 2. | Plantae |
| 3. | Monera | 4. | Protista |
Subtopic: Different Classification Systems |
60%
Level 2: 60%+
AIPMT - 2012
Hints
Read the following four statements (I-IV):
| I. | Both, photophosphorylation and oxidative phosphorylation involve uphill transport of protons across the membrane |
| II. | In dicot stems, a new cambium originates from cells of pericycle at the time of secondary growth |
| III. | Stamens in flowers of Gloriosa and Petunia are polyandrous |
| IV. | Symbiotic nitrogen-fixers occur in a free-living state and also in soil |
How many of the above statements are right?
1. Three
2. Four
3. One
4. Two
Subtopic: Nitrogen Fixation | Nodule formation |
Level 3: 35%-60%
AIPMT - 2012
Hints
Domestic sewage in large cities:
| 1. | is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs) |
| 2. | when treated in STPs, does not require the aeration step as the sewage contains adequate oxygen |
| 3. | has very high amounts of suspended solids and dissolved salts |
| 4. | has a high BOD as it contains both aerobic and anaerobic bacteria |
Subtopic: Microbes in Sewage Treatment |
68%
Level 2: 60%+
AIPMT - 2012
Hints
Which one of the following pairs is wrongly matched?
| 1. | Salvinia - Prothallus | 2. | Viroids – RNA |
| 3. | Mustard-Synergids | 4. | Ginkgo-Archegonia |
Subtopic: Miscellaneous |
Level 3: 35%-60%
AIPMT - 2012
Hints
What is it that forms the basis of DNA Fingerprinting?
| 1. | The relative difference in the DNA occurrence in blood, skin and saliva |
| 2. | The relative amount of DNA in the ridges and grooves of the fingerprints |
| 3. | Satellite DNA occurs as highly repeated short DNA segments |
| 4. | The relative proportions of purines and pyrimidines in DNA |
Subtopic: DNA Fingerprinting |
81%
Level 1: 80%+
AIPMT - 2012
Hints
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