NEET Botany MCQs

Movement and accumulation of ions across a membrane against their concentration gradient can be explained by:

• Active Transport
• Osmosis
• Facilitated Diffusion
• Passive Transport

Given below are two statements:<br> Statement I: The forces generated by transpiration can lift a xylem-sized column of water over 130 meters height.<br> Statement II: Transpiration cools leaf surfaces sometimes 10 to 15 degrees, by evaporative cooling.<br> In the light of the above statements, choose the most appropriate answer from the options given below:

• Statement I is incorrect but Statement II is correct.
• Both Statement I and Statement II are correct.
• Both Statement I and Statement II are incorrect
• Statement I is correct but Statement II is incorrect.

Which micronutrient is required for splitting of water molecule during photosynthesis?

• copper
• manganese
• molybdenum
• magnesium

How many ATP and NADPH, are required for the synthesis of one molecule of Glucose during Calvin cycle?

• 18 ATP and 16 NADPH₂
• 12 ATP and 12 NADPH₂
• 18 ATP and 12 NADPH₂
• 12 ATP and 16 NADPH₂

The reaction centre in PS II has an absorption maxima at:

• 780 nm
• 680 nm
• 700 nm
• 660 nm

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:<br><br> <i>Assertion A:</i> ATP is used at two steps in glycolysis.<br><br> <i>Reason R:</i> First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6- phosphate into fructose-1-6-diphosphate.<br><br> In the light of the above statements, choose the correct answer from the options given below is true:

• A is false but R is true.
• Both A and R are true and R is the correct explanation of A
• Both A and R are true but R is NOT the correct explanation of A.
• A is true but R is false.

Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?

• Abscisic Acid
• Indole-3-butyric Acid
• Gibberellic Acid
• Zeatin

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:<br> Assertion A: ATP is used at two steps in glycolysis.<br> Reason R: First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6- phosphate into fructose-1-6-diphosphate.<br> In the light of the above statements, choose the correct answer from the options given below is true,

• Senescence
• Differentiation
• Dedifferentiation
• Development

Which hormone promotes intemode/petiole elongation in deep water rice?

• 2, 4-D
• GA₃
• Kinetin
• Ethylene

Large, colourful, fragrant flowers with nectar are seen in:

• wind pollinated plants
• insect pollinated plants
• bird pollinated plants
• bat pollinated plants