The infectious stage of plasmodium that enters the human body is:

1. Sporozoites

2. Female gametocytes

3. Male gametocytes

4. Trophozoites

Subtopic:  Treatment & Life Cycle of Malaria |
 92%
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The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and early morning is:

1. Root pressure

2. Imbibition

3. Plasmolysis

4. Transpiration

Subtopic:  Transpiration & Guttation |
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From his experiments, S.L. Miller produced amino acids by mixing which of the following in a closed flask:

1. CH3, H2, NH4 and water vapour at 800°C

2. CH4, H2, NH3 and water vapour at 600°C

3. CH3, H2, NH3 and water vapour at 600°C

4. CH4, H2, NH3 and water vapour at 800°C

Subtopic:  Examples of Chemical Evolution | Urey & Miller Experiment |
 80%
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In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

1. Gross primary productivity is always more than Net primary productivity.
2. Gross primary productivity and Net primary productivity are one and the same.
3. There is no relationship between Gross primary productivity and Net primary productivity.
4. Gross primary productivity is always less than net primary productivity.

Subtopic:  Ecosystem Productivity |
 83%
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The sequence that controls the copy number of the linked DNA in the vector is termed as :
1. Ori site
2. Palindromic sequence
3. Recognition site
4. Selectable marker
Subtopic:  Tools: Vectors: I | Tools |
 76%
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Cuboidal epithelium with brush border of microvilli is found in :

1. Ducts of salivary glands

2. Proximal convoluted tubule of nephron 

3. Eustachian tube

4. Lining of intestine

Subtopic:  Simple Epithelium |
 75%
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The body of the ovule is fused within the funicle at :

1. Micropyle 2. Nucellus
3. Chalaza 4. Hilum
Subtopic:  Pistil: Ovule |
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In light reaction, plastoquinone facilitates the transfer of electrons from:

1. Cytb6f complex to PS-I

2. PS-I to NADP+

3. PS-I to ATP synthase

4. PS-II to Cytb6f complex

Subtopic:  Light Reactions :1 | Light Reactions |
 66%
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Match the following diseases with the causative organism and select the correct option.

Column  -I Column- II
(a) Typhoid (i) Wuchereria
(b) Pneumonia (ii) Plasmodium
(c) Filariasis (iii) Salmonella
(d) Malaria (iv) Haemophilus

(a) (b) (c) (d)
1. (iii) (iv) (i) (ii)
2. (ii) (i) (iii) (iv)
3. (iv) (i) (ii) (iii)
4. (i) (iii) (ii) (iv)
Subtopic:  Typhoid Fever | Pneumonia & Related Questions | Common Cold & Malaria Introduction | Ascariasis & Filariasis |
 94%
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Match the following  microorganism with product

Column - I Column - II
(a) Clostridium butylicum (i) Cyclosporin A
(b) Trichoderma polysporunt (ii) Butyric acid
(c) Monascus purpureus (iii) Citric acid
(d) Aspergillus niger (iv) Blood cholesterol lowering agent
 
(a) (b) (c) (d)
1. (ii) (i) (iv) (iii)
2. (i) (ii) (iv) (iii)
3. (iv) (iii) (ii) (i)
4. (iii) (iv) (ii) (i)
Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 90%
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