Cell Structure and Function

Which pigment is essential for photosynthesis in chloroplasts?

• Carotenoids
• Xanthophyll
• Haemoglobin
• Chlorophyll

Which structure regulates the passage of substances into and out of the nucleus?

• Cell membrane
• Plasmodesmata
• Chromatin
• Nuclear pores

Which organelle is responsible for ATP synthesis in eukaryotic cells?

• Ribosome
• Golgi apparatus
• Lysosome
• Mitochondria

What happens to a cell placed in a hypertonic solution?

• It swells
• It bursts
• It remains unchanged
• It shrinks due to loss of water

Which process allows oxygen to enter the cell?

• Osmosis
• Active transport
• Endocytosis
• Diffusion