In the DNA molecule:
1.
The total amount of purine nucleotides and pyrimidine nucleotides
is not always equal
2.
There are two strands, which run parallel in the 5' → 3’ direction
3.
The proportion of adenine in relation to thymine varies with the organism
4.
There are two strands, which run antiparallel - one in 5' → 3’ direction
and the other in 3’→ 5’
| 1. | The total amount of purine nucleotides and pyrimidine nucleotides is not always equal |
| 2. | There are two strands, which run parallel in the 5' → 3’ direction |
| 3. | The proportion of adenine in relation to thymine varies with the organism |
| 4. | There are two strands, which run antiparallel - one in 5' → 3’ direction and the other in 3’→ 5’ |
Subtopic: DNA Double Helix |
90%
From NCERT
AIPMT - 2008
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Consider the following four measures (A.D) that could be taken to successfully grow chickpeas in an area where bacterial blight disease is common:
| (A) | spray with Bordeaux mixture |
| (B) | control of the insect vector of the disease pathogen |
| (C) | use of only disease-free seeds |
| (D) | use of varieties resistant to the disease |
Which two of the above measures can control the disease?
1. B and C
2. A and B
3. C and D
4. A and D
Subtopic: Breeding for Disease Resistance (OLD NCERT) |
54%
AIPMT - 2008
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Hints
The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of:
1. lignified thick walls
2. cohesion and adhesion
3. weak gravitational pull
4. transpiration pull
Subtopic: Transpiration & Guttation | Transpiration Pull: Illustration |
71%
AIPMT - 2008
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The blood calcium level is lowered by the deficiency of:
1. parathormone
2. thyroxine
3. calcitonin
4. Both 1 and 3
Subtopic: Parathyroid |
57%
From NCERT
AIPMT - 2008
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About 70% of total global carbon is found in:
| 1. | grasslands | 2. | agro-ecosystems |
| 3. | oceans | 4. | forests |
Subtopic: Mineral Cycling & Ecosystem Services (OLD NCERT) |
83%
From NCERT
AIPMT - 2008
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Which one of the following is heterosporous?
1. Dryopteris
2. Salvinia
3. Adiantum
4. Equisetum
Subtopic: Pteridophytes: Heterospory | Pteridophytes |
92%
From NCERT
AIPMT - 2008
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Links
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Dry indehiscent single-seeded fruit formed from the bi-carpellary syncarpous inferior ovary is:
1. caryopsis
2. cypsela
3. berry
4. cremocarp
1. caryopsis
2. cypsela
3. berry
4. cremocarp
Subtopic: Parts of Flower: III | Fruits & their Types | Flower & Parts of Flower |
AIPMT - 2008
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Hints
Which extra embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
1. Chorion
2. Allantois
3. Yolk sac
4. Amnion
Subtopic: Implantation : Part 2 | Embryonic Development till Gastrulation | Implantation |
56%
AIPMT - 2008
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Hints
The fleshy receptacle of the syconus of fig encloses several:
1. achenes
2. samaras
3. berries
4. mericarps
Subtopic: Fruits & their Types |
62%
AIPMT - 2008
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Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
1. Bacterial leaf blight of rice
2. Downy mildew of grapes
3. Loose smut of wheat
4. Black rust of wheat
Subtopic: Breeding for Disease Resistance (OLD NCERT) | Insect & Pest Resistance (OLD NCERT) |
56%
AIPMT - 2008
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
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