Electrons from excited chlorophyll molecule of photosystem-ll are accepted first by:
1. cytochrome-b
2. cytochrome-f
3. quinone
4. ferredoxin
Electrons from excited chlorophyll molecule of photosystem-ll are accepted first by:
1. cytochrome-b
2. cytochrome-f
3. quinone
4. ferredoxin
Subtopic: Photosystems |
68%
Level 2: 60%+
AIPMT - 2008
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Trichoderma harzianum has proved to be a useful micro-organism for:
1. bioremediation of contaminated soils
2. reclamation of wastelands
3. gene transfer in higher plants
4. biological control of soil-borne plant pathogens
Subtopic: Microbes in Biocontrol Agent |
88%
Level 1: 80%+
AIPMT - 2008
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Links
Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?
| 1. | Neutrophils | 2. | Basophils |
| 3. | Eosinophils | 4. | Monocytes |
Subtopic: Blood: White Blood Cells |
90%
Level 1: 80%+
AIPMT - 2008
Hints
Which one of the following in birds, indicates their reptilian ancestry?
| 1. | Scales on their hind limbs |
| 2. | Four-chambered heart |
| 3. | Two special chambers crop and gizzard in their digestive tract |
| 4. | Eggs with a calcareous shell |
Subtopic: Study of Reptilia | Study of Aves & Mammals |
Level 3: 35%-60%
AIPMT - 2008
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Subtopic: Endosperm |
69%
Level 2: 60%+
AIPMT - 2008
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In humans, at the end of the first meiotic division, the male germs cells differentiate into the:
1. primary spermatocytes
2. secondary spermatocytes
3. spermatids
4. spermatogonia
Subtopic: Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |
69%
Level 2: 60%+
AIPMT - 2008
Hints
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’ |
Subtopic: DNA Double Helix |
91%
Level 1: 80%+
AIPMT - 2008
Hints
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
53%
Level 3: 35%-60%
AIPMT - 2008
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 |
69%
Level 2: 60%+
AIPMT - 2008
Hints
The blood calcium level is lowered by the deficiency of:
1. parathormone
2. thyroxine
3. calcitonin
4. Both 1 and 3
Subtopic: Parathyroid |
58%
Level 3: 35%-60%
AIPMT - 2008
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