What will happen if HCl secretion of parietal cells of gastric glands is blocked with an inhibitor?
1.
Gastric juice will be deficient in chymosin
2.
Gastric juice will be deficient in pepsinogen
3.
In the absence of HCl secretion, inactive pepsinogen
is not converted into the active enzyme pepsin
4.
Enterokinase will not be released from the duodenal
mucosa and so trypsinogen is not converted to trypsin
| 1. | Gastric juice will be deficient in chymosin |
| 2. | Gastric juice will be deficient in pepsinogen |
| 3. | In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin |
| 4. | Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin |
Subtopic: Gastric Secretions |
87%
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AIPMT - 2008
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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%
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%
From NCERT
AIPMT - 2008
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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 |
89%
From NCERT
AIPMT - 2008
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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 |
AIPMT - 2008
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Subtopic: Endosperm |
71%
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 |
71%
From NCERT
AIPMT - 2008
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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 |
90%
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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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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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