IB Biology: Cell Biology - Plant Cells 1

This video tutorial covers the ultrastructure of plant cells, focusing on the separation of organelles from the environment and the storage of genetic material. It introduces eukaryotic cells, particularly plant cells, and explains the functions of various organelles such as the nucleus, cell wall, and plasma membrane. The tutorial also discusses photosynthesis and the importance of understanding plant cell components for biology students.

What is the primary function of the palisade mesophyll in plant leaves?

• To protect the leaf from insects

• To store water

• To capture sunlight for photosynthesis

• To transport nutrients

Which structure provides extra strength and support to plant cells?

• Cytoplasm

• Cell wall

• Nucleus

• Plasma membrane

What is the main role of the plasma membrane in plant cells?

• To control the entry and exit of substances

• To provide structural support

• To store genetic material

• To synthesize proteins

Which component of the nucleus is responsible for assembling ribosomes?

• Nucleoplasm

• Nucleolus

• Chromosomal DNA

• Nuclear membrane

What is the primary function of the nucleoplasm?

• To store water

• To contain genetic information

• To synthesize proteins

• To transport nutrients

What is the cytosol primarily composed of?

• Carbohydrates and fats

• DNA and RNA

• Water, salts, enzymes, and organic molecules

• Proteins and lipids

Which part of the cell is described as the 'city center' in the analogy used in the lesson?

• Nucleus

• Cytoplasm

• Cell wall

• Protoplasm

What is the main difference between the cytoplasm and the protoplasm?

• Protoplasm is only found in animal cells

• Protoplasm excludes the nucleus

• Cytoplasm includes the nucleus

• Cytoplasm excludes the nucleus

Which of the following is NOT a component of the nucleus?

• Ribosome

• Nuclear membrane

• Nucleolus

• Nucleoplasm

What is the primary role of the cell wall in plant cells?

• To transport nutrients

• To synthesize proteins

• To store genetic information

• To provide structural support and protection