General Science - MCQ Practice Questions

Which of the following is the primary pigment responsible for absorbing light energy in the visible spectrum during photosynthesis?

The pH of cell sap in plant cells typically ranges between:

Which element is essential for the synthesis of chlorophyll molecule and forms the central atom in its structure?

The phenomenon where plants bend towards light source is governed by which hormone?

The process by which plants lose water as water vapour through stomata is called:

A plant cell is placed in a hypertonic solution. Which physical phenomenon occurs, and what is the correct term for it?

Which of the following represents the correct order of plant tissues from outside to inside in a dicot stem?

The phenomenon of senescence in plants is primarily controlled by which plant hormone?

Which of the following statements about stomata is correct?

Which of the following is characteristic of monocot roots?

The green color of chloroplasts is due to which property of chlorophyll?

The process of nitrogen fixation in legumes is performed by which organism?

Which of the following organelles is responsible for synthesizing ATP through oxidative phosphorylation in plant cells?

During C3 photosynthesis, the first stable product formed after CO₂ fixation is:

Which enzyme catalyzes the carboxylation of RuBP in the Calvin cycle, and what is its full name?

Which of the following is a C4 plant commonly cultivated in India for fodder and grain production?

The phenomenon of etiolation in plants is characterized by:

Which plant hormone promotes fruit ripening and is commercially used in India for tomato and mango maturation?

The double fertilization process unique to angiosperms results in the formation of:

Which of the following is the primary pigment responsible for capturing light energy in photosynthesis?