If a female individual is with small round head, furrowed tongue, partially open mouth and broad palm with characteristic palm crease. Also the physical, psychomotor and mental development is retarded. The karyotype analysis of such an individual will show :
| 1. | 47 chromosomes with XXY sex chromosomes |
| 2. | 45 chromosomes with XO sex chromosomes |
| 3. | 47 chromosomes with XYY sex chromosomes |
| 4. | Trisomy of chromosome 21 |
Subtopic: Non - Disjunction & Aneuploidy |
87%
Level 1: 80%+
NEET - 2022
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Identify the correct sequence of events during Prophase I of meiosis:
Choose the correct answer from the options given below:
| a. | Synapsis of homologous chromosomes |
| b. | Chromosomes become gradually visible under a microscope |
| c. | Crossing over between non-sister chromatids of homologous chromosomes |
| d. | Terminalisation of chiasmata |
| e. | Dissolution of synaptonemal complex |
Choose the correct answer from the options given below:
| 1. | (a), (b), (c), (d), (e) | 2. | (b), (c), (d), (e), (a) |
| 3. | (b), (a), (c), (e), (d) | 4. | (a), (c), (d), (e), (b) |
Subtopic: Cell Cycle: Meiosis I |
84%
Level 1: 80%+
NEET - 2022
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The enzyme (a) is needed for isolating genetic material from plant cells and enzyme (b) for isolating genetic material from fungus. Choose the correct pair of options from the following :
1. (a) Cellulase (b) Protease
2. (a) Cellulase (b) Chitinase
3. (a) Chitinase (b) Lipase
4. (a) Cellulase (b) Lipase
1. (a) Cellulase (b) Protease
2. (a) Cellulase (b) Chitinase
3. (a) Chitinase (b) Lipase
4. (a) Cellulase (b) Lipase
Subtopic: General Design of an rDNA experiment |
93%
Level 1: 80%+
NEET - 2022
Hints
Match the List-I with List-II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| (a) | Carbon dissolved in oceans | (i) | 55 billion tons |
| (b) | Annual fixation of carbon through photosynthesis | (ii) | 71% |
| (c) | PAR captured by plants | (iii) | \(4 \times 10^3 \)kg |
| (d) | Productivity of oceans | (iv) | 2 to 10% |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iv) | (iii) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (ii) | (iii) | (iv) | (i) |
| 4. | (iii) | (ii) | (i) | (iv) |
Subtopic: Ecosystem Productivity |
86%
Level 1: 80%+
NEET - 2022
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What is the expected percentage of F2 progeny with yellow and inflated pod in dihybrid cross experiment involving pea plants with green coloured, inflated pod and yellow coloured constricted pod?
| 1. | 100% | 2. | 56.25% |
| 3. | 18.75 % | 4. | 9% |
Subtopic: Dihybrid Cross Analysis |
55%
Level 3: 35%-60%
NEET - 2022
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Pathogenic bacteria gain resistance to antibiotics due to changes in their:
1. Cosmids
2. Plasmids
3. Nucleus
4. Nucleoid
1. Cosmids
2. Plasmids
3. Nucleus
4. Nucleoid
Subtopic: Cloning Vector |
86%
Level 1: 80%+
NEET - 2022
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Milk of transgenic 'Cow Rosie' was nutritionally more balanced product for human babies than natural cow milk because it contained:
| 1. | Human protein \(\alpha\) –1–antitrypsin. |
| 2. | Human alpha–lactalbumin. |
| 3. | Human insulin–like growth factor. |
| 4. | Human enzyme Adenosine Deaminase (ADA). |
Subtopic: Transgenic Microbes & Animals |
84%
Level 1: 80%+
NEET - 2022
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If the pH in lysosomes is increased to alkaline, what will be the outcome?
| 1. | Hydrolytic enzymes will function more efficiently |
| 2. | Hydrolytic enzymes will become inactive |
| 3. | Lysosomal enzymes will be released into the cytoplasm |
| 4. | Lysosomal enzymes will be more active |
Subtopic: Lysosomes |
81%
Level 1: 80%+
NEET - 2022
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Which of the following reasons is mainly responsible for graft rejection in transplantation of organs?
| 1. | Inability of recipient to differentiate between 'self and 'non–self' tissues/cells |
| 2. | Humoral immune response only |
| 3. | Auto–immune response |
| 4. | Cell–mediated response |
Subtopic: Details of Immunity |
86%
Level 1: 80%+
NEET - 2022
Hints
If DNA contained sulphur instead of phosphorus and proteins contained phosphorus instead of sulfur, what would have been the outcome of Hershey and Chase experiment?
| 1. | No radioactive sulfur in bacterial cells |
| 2. | Both radioactive sulfur and phosphorus in bacterial cells |
| 3. | Radioactive sulfur in bacterial cells |
| 4. | Radioactive phosphorus in bacterial cells |
Subtopic: Search for Genetic Material |
73%
Level 2: 60%+
NEET - 2022
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