The process of growth is maximum during:

NEET-(Sept)2020 Plant-Growth-and-Development [class-xi ]

• Log phase
• Lag phase
• Senescence
• Dormancy
Correct Option: A  [ Log phase ]

Remark:

Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.

NEET-(Sept)2020 Plant-Growth-and-Development [class-xi ]

• Cytokinin
• Gibberellin
• Ethylene
• Abscisic acid
Correct Option: B  [ Gibberellin ]

Remark:

Identify the correct statement with reference to human digestive system.

NEET-(Sept)2020 Digestion-and-Absorption [class-xi ]

• Ileum opens into small intestine.
• Serosa is the innermost layer of the alimentary canal.
• Ileum is a highly coiled part.
• Vermiform appendix arises from duodenum.
Correct Option: C  [ Ileum is a highly coiled part. ]

Remark:

The enzyme enterokinase helps in conversion of:

NEET-(Sept)2020 Digestion-and-Absorption [class-xi ]

• protein into polypeptides
• trypsinogen into trypsin
• caseinogen into casein
• pepsinogen into pepsin
Correct Option: B  [ trypsinogen into trypsin ]

Remark:

Select the correct events that occur during inspiration.
A. Contraction of diaphragm
B. Contraction of external inter-costal muscles
C. Pulmonary volume decreases
D. Intra pulmonary pressure increases

NEET-(Sept)2020 Breathing-and-Exchange-of-Gases [class-xi ]

• (A) and (B)
• (C) and (D)
• (A), (B) and (D)
• only (D)
Correct Option: A  [ (A) and (B) ]

Remark:

Identify the wrong statement with reference to transport of oxygen.

NEET-(Sept)2020 Breathing-and-Exchange-of-Gases [class-xi ]

• Binding of oxygen with haemoglobin is mainly related to partial pressure of O₂.
• Partial pressure of CO₂ can interfere with O₂ binding with haemoglobin.
• Higher H⁺ conc. in alveoli favours the formation of oxyhaemoglobin.
• Low pCO₂ in alveoli favours the formation of oxyhaemoglobin.
Correct Option: C  [ Higher H⁺ conc. in alveoli favours the formation of oxyhaemoglobin. ]

Remark:

Match the following columns and select the correct option.

NEET-(Sept)2020 Body-Fluids-and-Circulation [class-xi ]

• (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
• (A)-(IV), (B)-(I) (C)-(II), (D)-(III)
• (A)-(I), (B)-(II, (C)-(IV), (D)-(III)
• (A)-(II), (B)-(I), (C)-(III), (D)-(IV)
Correct Option: A  [ (A)-(III), (B)-(IV), (C)-(II), (D)-(I) ]

Remark:

The QRS complex in a standard ECG represents:

NEET-(Sept)2020 Body-Fluids-and-Circulation [class-xi ]

• Repolarisation of auricles
• Depolarisation of auricles
• Depolarisation of ventricles
• Repolarisation of ventricles
Correct Option: C  [ Depolarisation of ventricles ]

Remark:

Presence of which of the following conditions in urine are indicative of Diabetes Mellitus?

NEET-(Sept)2020 Excretory-Products-and-their-Elimination [class-xi ]

• Uremia and Ketonuria
• Uremia and Renal Calculi
• Ketonuria and Glycosuria
• Renal calculi and Hyperglycaemia
Correct Option: C  [ Ketonuria and Glycosuria ]

Remark:

Which of the following would help in prevention of diuresis?

NEET-(Sept)2020 Excretory-Products-and-their-Elimination [class-xi ]

• More water reabsorption due to undersecretion of ADH
• Reabsorption of Na⁺ and water from renal tubules due to aldosterone
• Atrial natriuretic factor causes vasoconstriction
• Decrease in secretion of renin by JG cells
Correct Option: B  [ Reabsorption of Na⁺ and water from renal tubules due to aldosterone ]

Remark: