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Which is the first stable product formed during the Calvin cycle?

1) Glyceraldehyde-3-phosphate 2) 3-phosphoglycerate 3) Triose phosphate 4) RuBP Answer:2) 3-phosphoglycerate Explanation: The first step of the... View Article

How many molecules of ATP and NADPH are utilised for the regeneration of one RuBP molecule.

1) 1 ATP and 1 NADPH 2) 1 NADPH only 3) 1 ATP only 4) 2 ATP and 2 NADPH Answer:3) 1 ATP only Explanation: The Calvin cycle occurs in the three... View Article

Carboxylation in the C3 plants requires the following enzyme:

1) Kinase 2) RuBisCO 3) Nitrogenase 4) -ketoglutarate dehydrogenase Answer:2) RuBisCO Explanation: RuBisCO catalyses the first step of the... View Article

In Kranz anatomy, bundle sheath cells have

1) thick walls, no intercellular spaces and a large number of chloroplasts 2) thick walls, no intercellular spaces and no chloroplasts 3) thin... View Article

What is the number of carbon atoms in phosphoenolpyruvate?

1) 2 2) 3 3) 4 4) 5 Answer:2) 3 Explanation: Phosphoenolpyruvate is a three-carbon compound. It is the primary acceptor of CO2 in C4 plants. It... View Article

CAM helps the plant in _______.

1) secondary growth 2) primary growth 3) transporting minerals and nutrients from the soil 4) reducing loss of water by transpiration Answer:4)... View Article

Which of the following plants have the RuBisCO enzyme?

1) C4 plants 2) C3 plants 3) CAM plants 4) All of these Answer:4) All of these Explanation: RuBisCO enzyme occurs in all of these plants. RuBisCO... View Article

Select the correct match regarding absorption and movement of minerals.

1) Passive uptake - Slow, second phase of mineral uptake 2) Efflux - Inward movement of ions into a cell 3) Active uptake - initial rapid mineral... View Article

Identify the correct set of elements, whose deficiency first occurs in older leaves.

1) N, S, Ca 2) N, Ca, Mg 3) Mg, S, Ca 4) N, K, Mg Answer:4) N, K, Mg Explanation: Elements such as N, K and Mg that are readily mobilised and... View Article

Which of the following nutrient elements cannot undergo remobilisation in plants?

1) Nitrogen 2) Potassium 3) Calcium 4) Magnesium Answer:3) Calcium Explanation: Calcium contributes to the structural makeup of the plant and... View Article

Which of the following is incorrect regarding essential elements and their role in plants?

1) Chlorine: splitting of water during light reaction 2) Magnesium: Constituent of chlorophyll 3) Manganese: splitting of water during light... View Article

______ is needed for the synthesis of auxins.

1) Zinc 2) Molybdenum 3) Copper 4) Potassium Answer:1) Zinc Explanation: Zinc is needed for the biosynthesis of auxins. Zinc is essential for the... View Article

The activator for enzymes RuBisCO and PEPcase is a

1) micronutrient 2) macronutrient 3) beneficial element 4) trace element Answer:2) macronutrient Explanation: Magnesium acts as an activator for... View Article

Which of the following is a criterion required for the essentiality of an element in plants?

1) The element must be directly involved in the metabolism of the plant 2) The element must be absolutely essential for growth and reproduction... View Article

The technique of hydroponics used for growing plants does not require

1) The element must be directly involved in the metabolism of the plant 2) The element must be absolutely essential for growth and reproduction... View Article

What is the correct sequence of steps in the cell cycle?

1) Karyokinesis, cytokinesis, interphase 2) Cytokinesis, karyokinesis, interphase 3) Interphase, karyokinesis, cytokinesis 4) Interphase,... View Article

If the DNA content of a cell in G1 phase is 4C, what would be its DNA content in G2 phase?

1) 1C 2) 2C 3) 4C 4) 8C Answer:4) 8C Explanation: The order of interphase stages is G1 → S → G2. DNA replication takes place during the... View Article

Which two processes occur during the M phase of the cell cycle?

1) DNA replication and cell division 2) Karyokinesis and cytokinesis 3) Cell growth and karyokinesis 4) Cytokinesis and DNA replication Answer:2)... View Article

Pick the wrong statement about interphase from the following:

1) It is called the resting phase 2) There is no cellular growth 3) There is DNA replication 4) It is divided into three phases Answer:2) There... View Article

What best describes the cell in the G0 phase? They

1) are metabolically inactive 2) cannot divide forever 3) can re-enter G1 phase 4) both 1 and 3 are correct Answer:3) can re-enter G1 phase... View Article

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