Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?

• Lysosome

• Ribosome

• Chloroplast

• Chloroplast

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

• Light saturation for CO₂ fixation occurs at 10% of full sunlight

• Increasing atmospheric CO₂ concentration upto 0.05% can enhance CO₂ fixation rate

• C₃ plants responds to higher temperatures with enhanced photosynthesis while C₄ plants have much lower temperature optimum

• C₃ plants responds to higher temperatures with enhanced photosynthesis while C₄ plants have much lower temperature optimum

Phosphoenol pyruvate (PEP) is the primary CO₂ acceptor in :

• C₃ plants

• C₄ plants

• C₂ plants

• C₂ plants

Which of the following is not a product of light reaction of photosynthesis?

• ATP

• NADH

• Oxygen

• NADPH

Stomata in grass leaf are

• Dumb-bell shaped

• Kidney Shaped

• Barrel shaped

• Rectangular

36.

Herbicide that blocks electrons transport from PS-II to PS-I by inhibiting electron flow between plastoquinone → Cytochrome is

• DCMU

• Paraquat

• DCPIP

• None of these

A plant is provided with the ideal conditions for photosynthesis and supplied with isotope 14 CO₂. When the products of the process are analysed carefully, what would be the nature of products?

• Glucose and oxygen are labelled

• Oxygen is labelled, but glucose is normal

• Glucose and oxygen are normal 

• Glucose is labelled, but oxygen is normal

Cotyledons and testa are edible parts of

• groundnut and pomegranate

• walnut and tamarind

• french bean and coconut

• cashew nut and litchi

Given below is a schematic break-up of the phases/stages of cell cycle. Which one of the following is the correct indication of the stage/ phase in the cell cycle?

• C-karyokinesis

• S-synthetic phase

• A-cytokinesis

• B-metaphase

In photosynthesis carbon dioxide is converted to carbohydrates. It is a process.

• Reductive

• Oxidative

• Catabolic and exergonic

• None of the above