What will happen if fresh water lake gets contaminated by the addition of polluted water with high BOD?
1.
Amount of dissolved oxygen in the lake will decrease.
2.
The lake will remain unaffected
3.
Number of submerged aquatic plants in the lake will increase
4.
Number of aquatic animals in the lake will increase.
Subtopic: Water Pollution |
83%
Level 1: 80%+
NEET - 2023
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The last chromosome sequenced in Human Genome project was:
| 1. | Chromosome 6 | 2. | Chromosome 1 |
| 3. | Chromosome 22 | 4. | Chromosome 14 |
Subtopic: Human Genome Project |
77%
Level 2: 60%+
NEET - 2023
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The amount of nutrients such as carbon, nitrogen, potassium and calcium present in the soil at any given time is referred to as:
| 1. | Standing state | 2. | Standing crop |
| 3. | Humus | 4. | Detritus |
64%
Level 2: 60%+
NEET - 2023
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Plants offer rewards to animals in the form of pollen and nectar and the animals facilitate the pollination process. This is an example of:
| 1. | Amensalism | 2. | Competition |
| 3. | Commensalism | 4. | Mutualism |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
91%
Level 1: 80%+
NEET - 2023
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The species of plants that plays a vital role in controlling the relative abundance of other species in a community is called _______.
1. alien species
2. endemic species
3. exotic species
4. keystone species
1. alien species
2. endemic species
3. exotic species
4. keystone species
Subtopic: Importance of Biodiversity |
64%
Level 2: 60%+
NEET - 2023
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Match List-I with List-II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| (A) | Pteropsida | (I) | Psilotum |
| (B) | Lycopsida | (II) | Equisetum |
| (C) | Psilopsida | (III) | Adiantum |
| (D) | Sphenopsida | (IV) | Selaginella |
| Options: | (A) | (B) | (C) | (D) |
| 1. | II | III | I | IV |
| 2. | III | I | IV | II |
| 3. | II | III | IV | I |
| 4. | III | IV | I | II |
Subtopic: Pteridophytes |
79%
Level 2: 60%+
NEET - 2023
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Subtopic: Carbohydrates: Cellulose, Chitin, Inulin & Agar |
84%
Level 1: 80%+
NEET - 2023
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Thermostable DNA polymerase used in PCR was isolated from:
| 1. | Thermus aquaticus | 2. | Escherichia coli |
| 3. | Agrobacterium tumefaciens | 4. | Bacillus thuringiensis |
Subtopic: Polymerase Chain Reaction: PCR |
90%
Level 1: 80%+
NEET - 2023
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Name the component that binds to the operator region of an operon and prevents RNA polymerase from transcribing the operon.
| 1. | Promotor | 2. | Regulator protein |
| 3. | Repressor protein | 4. | Inducer |
Subtopic: Gene Regulation: Lac Operon |
75%
Level 2: 60%+
NEET - 2023
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A heterozygous pea plant with violet flowers was crossed with a homozygous pea plant with white flowers. Violet is dominant over white. Which one of the following represents the expected combinations among 40 progenies formed?
1. 30 produced violet and 10 produced white flowers
2. 20 produced violet and 20 produced white flowers.
3. All 40 produced violet flowers
4. All 40 produced white flowers
1. 30 produced violet and 10 produced white flowers
2. 20 produced violet and 20 produced white flowers.
3. All 40 produced violet flowers
4. All 40 produced white flowers
Subtopic: Monohybrid Cross: 1 | Monohybrid Cross: Further Understanding |
71%
Level 2: 60%+
NEET - 2023
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