What are those structures that appear as 'beads-on-string' in the chromosomes when viewed under an electron microscope?
1. Nucleotides
2. Nucleosomes
3. Base pairs
4. Uracil

Subtopic:  DNA Packaging |
 92%
Level 1: 80%+
AIPMT - 2011
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Which one of the following statements for a pyramid of energy is incorrect, whereas the remaining three are correct?
1. It shows the energy content of different trophic-level organisms
2. It is inverted in shape
3. It is upright in shape
4. Its base is broad
Subtopic:  Ecological Pyramids |
 90%
Level 1: 80%+
AIPMT - 2011
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Match the source gland with its respective hormone as well as the function. 

Source
gland
Hormone Function
(a) Posterior
pituitary
Vasopressin Stimulates reabsorption
of water in the distal
tubules in the nephron
(b) Corpus
luteum
Prolactin Supports pregnancy
(c) Thyroid Thyroxine Regulates blood calcium
level
(d) Anterior
pituitary
Oxytocin Contraction of uterus
muscles during childbirth

1.  (a)

2.  (b)

3.  (c)

4.  (d)

Subtopic:  Pituitary & Hypothalamus | Prolactin & Posterior Pituitary | Thyroid Gland Part I |
 78%
Level 2: 60%+
AIPMT - 2011
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Medical Termination of Pregnancy (MTP) is considered safe up to how many weeks of pregnancy?
1. Twelve weeks
2. Eighteen weeks
3. Six weeks
4. Eight weeks
Subtopic:  Medical Termination of Pregnancy |
 92%
Level 1: 80%+
AIPMT - 2011
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The gametophyte is not an independent, free-living generation in:
1.  Adiantum
2.  Marchantia
3.  Pinus
4.  Polytrichum
Subtopic:  Gymnosperms: I | Gymnosperms |
 81%
Level 1: 80%+
AIPMT - 2011
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Which one of the following has the highest number of species in nature?
1. Insects 2. Birds
3. Angiosperms 4. Fungi
Subtopic:  Magnitude of Biodiversity |
 70%
Level 2: 60%+
AIPMT - 2011
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Which one of the following statements is correct regarding blood pressure?
 
1. 100/55 mmHg is considered an ideal blood pressure
2. 105/50 mmHg makes one very active
3. 190/110 mmHg may harm vital organs like the brain and kidney
4. 130/90 mmHg is considered high and requires treatment

Subtopic:  Atherosclerosis, Hypertension & Ventricular Fibrillation |
 74%
Level 2: 60%+
AIPMT - 2011
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Given ahead is an incomplete table about certain hormones, their source glands and one major effect of each on the body in humans. Identify the correct option for the three blanks A, B and C.

 Gland  Secretion Effect on Body
  A    Oestrogen Maintenance of secondary sexual characters
Alpha cells of islets of Langerhans  B Raises blood sugar level
Anterior pituitary   C Oversecretion leads to gigantism
 
Options: A B C
1. Placenta   Insulin Vasopressin
2. Ovary      Insulin Calcium
3. Placenta Glucagon  Calcitonin
4. Ovary    Glucagon Growth hormone
Subtopic:  Adenohypophysis & Hypothalamus | Human Growth Hormone | Pancreas: I | Pancreas |
 92%
Level 1: 80%+
AIPMT - 2011
Hints

One very special feature in the earthworm Pheretima is that:
 
1. the typhlosole greatly increases the effective absorption area of the digested food in the intestine
2. the S-shaped setae embedded in the integument are the defensive weapons used against the enemies
3. it has a long dorsal tubular heart
4. fertilization of eggs occurs inside the body

Subtopic:  Earthworm |
 53%
Level 3: 35%-60%
AIPMT - 2011
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The 'Eyes' of the potato tuber are:

1.  flower buds

2.  shoot buds

3.  axillary buds

4.  root buds

Subtopic:  Aerial Stem Modification |
 80%
Level 1: 80%+
AIPMT - 2011
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