Identify the wrong statement with reference to transport of oxygen:
1.
Partial pressure of CO2 can interfere with O2 binding with haemoglobin.
2.
Higher H+ concentration in alveoli favours the formation of oxyhaemoglobin.
3.
Low pCO2 in alveoli favours the formation of oxyhaemoglobin.
4.
Binding of oxygen with haemoglobin is mainly related to partial pressure of O2.
Identify the wrong statement with reference to the gene 'I' that controls ABO blood groups.
| 1. | A person will have only two of the 3 alleles. |
| 2. | When IA and IB are present together, they express same type of sugar. |
| 3. | Allele 'i' does not produce any sugar. |
| 4. | The gene (I) has three alleles. |
Identify the basic amino acid from the following.
1. Glutamic Acid
2. Lysine
3. Valine
4. Tyrosine
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
1. Gibberellin
2. Ethylene
3. Abscisic acid
4. Cytokinin
Match the organism with its use in biotechnology.
| (a) | Bacillus thuringiensis | (i) | Cloning vector |
| (b) | Thermus aquaticus | (ii) | Construction of first rDNA molecule |
| (c) | Agrobacterium tumefaciens | (iii) | DNA polymerase |
| (d) | Salmonella typhimurium | (iv) | Cry proteins |
Select the correct option from the following:
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (iii) | (i) | (ii) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (iii) | (iv) | (i) | (ii) |
| 4. | (ii) | (iv) | (iii) | (i) |
Which of the following statements is correct?
1. Adenine pairs with thymine through one H-bond.
2. Adenine pairs with thymine through three H-bonds.
3. Adenine does not pair with thymine.
4. Adenine pairs with thymine through two H-bonds.
Match the following diseases with the causative organism and select the correct option:
| Column I | Column II | ||
| (a) | Gregarious, polyphagous pest | (i) | Asterias |
| (b) | Adult with radial symmetry and larva with bilateral symmetry | (ii) | Scorpion |
| (c) | Book lungs | (iii) | Ctenoplana |
| (d) | Bioluminescence | (iv) | Locusta |
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (i) | (ii) | (iii) |
| 2. | (iii) | (ii) | (i) | (iv) |
| 3. | (ii) | (i) | (iii) | (iv) |
| 4. | (i) | (iii) | (ii) | (iv) |
Which of the following would help in prevention of diuresis?
| 1. | Reabsorption of Na+ and water from renal tubules due to aldosterone |
| 2. | Atrial natriuretic factor causes vasoconstriction |
| 3. | Decrease in the secretion of renin by JG cells |
| 4. | More water reabsorption due to under secretion of ADH |
Choose the correct pair from the following :
| 1. | Polymerases | - | Break the DNA into fragments |
| 2. | Nucleases | - | Separate the two strands of DNA |
| 3. | Exonucleases | - | Make cuts at specific positions within DNA |
| 4. | Ligases | - | Join the two DNA molecules |
Identify the correct statement with reference to human digestive system
1. Serosa is the innermost layer of the alimentary canal.
2. Ileum is a highly coiled part.
3. Vermiform appendix arises from duodenum.
4. Ileum opens into small intestine.
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