Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement:

1. Both are due to a quantitative defect in globin chain synthesis
2. Thalassemia is due to less synthesis of globin molecules
3. Sickle cell anemia is due to a quantitative problem of globin molecules
4. Both are due to a qualitative defect in globin chain synthesis

Subtopic:  Additional Note on Thalassemia |
 73%
From NCERT
NEET - 2017
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The genotypes of a husband and wife are IAIB and IAi respectively. Among the blood types of their children, how many different genotypes and phenotypes are possible?

1. 3 genotypes; 4 phenotypes

2. 4 genotypes; 3 phenotypes

3. 4 genotypes; 4 phenotypes

4. 3 genotypes; 3 phenotypes

Subtopic:  Co-dominance |
 74%
From NCERT
NEET - 2017
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Which of the following facilitates opening of stomatal aperture?

1. Decrease in turgidity of guard cells
2. Radial orientation of cellulose microfibrils in the cell wall of guard cells
3. Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
4. Contraction of outer wall of guard cells

Subtopic:  Stomata |
 75%
From NCERT
NEET - 2017
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In Bougainvillea thorns are the modifications of:

1. Adventitious root

2. Stem

3. Leaf

4. Stipules

Subtopic:  Aerial Stem Modification |
 73%
From NCERT
NEET - 2017
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Which one of the following is related to Ex-situ conservation of threatened animals and plants?

1. Biodiversity hot spots

2. Amazon rainforest

3. Himalayan region

4. Wildlife safari parks

Subtopic:  Ex Situ Conservation of Biodiversity |
 81%
From NCERT
NEET - 2017
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Root hairs develop from the region of:

1. Elongation

2. Root cap

3. Meristematic activity

4. Maturation

Subtopic:  Morphology of Roots |
 79%
From NCERT
NEET - 2017
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A disease caused by an autosomal primary non-disjunction is:

1. Klinefelter's Syndrome

2. Turner's Syndrome

3. Sickle Cell Anemia

4. Down's Syndrome

Subtopic:  Non - Disjunction & Aneuploidy |
 68%
NEET - 2017
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The water potential of pure water is:

1. Less than zero

2. More than zero but less than one

3. More than one

4. Zero

Subtopic:  Plant Water Relations: Water Potential: DPD |
 90%
From NCERT
NEET - 2017
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Which of the following options gives the correct sequence of events during mitosis?

1. Condensation, nuclear membrane disassembly, arrangement at the equator, centromere division, segregation, telophase
2. Condensation, crossing over, nuclear membrane disassembly, segregation, telophase
3. Condensation, centromere division, segregation, arrangement at the equator, telophase
4. Condensation, nuclear membrane disassembly, crossing over, segregation, telophase

Subtopic:  Cell Division: Mitosis (Karyokinesis) |
 76%
From NCERT
NEET - 2017
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The process of separation and purification of expressed protein before marketing is called:

1. Downstream processing

2. Bioprocessing

3. Post-product processing

4. Upstream processing

Subtopic:  Bioreactors/Downstream Processing |
 90%
From NCERT
NEET - 2017
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