Practise IB Biology HL B2.2 by linking compartmentalization, nuclear gene expression and protein pathways to organelle structures for respiration and photosynthesis.
53 questions in this syllabus scope, with question parts counted together.
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Testis cells are eukaryotic cells. Identify the structures seen under the electron microscope in testis cells that are not present in prokaryotic cells.
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The structure of membranes allows them to carry out many functions in cells.
Discuss the use of membranes for compartmentalization in eukaryotic cells.
Eukaryotic cells have membrane-bound organelles. What is a property of one of these organelles?
The rough endoplasmic reticulum synthesises lipids for use outside the cell.
The nucleus has a double membrane to allow vesicle formation for intracellular transport.
The mitochondrion has enzymes and substrates of the Krebs cycle compartmentalized in the matrix.
The Golgi apparatus uses ribosomes to synthesise proteins for export from the cell.
Describe how the structure of the chloroplast is adapted to its function in photosynthesis.
What is a benefit of double membranes surrounding the nuclei of eukaryotic cells?
They reduce the surface area of the nucleus.
They can easily break down into vesicles during mitosis.
Hydrophilic phospholipid tails can be kept away from the cytoplasm.
Pores are formed to allow movement of DNA from the nucleus to the cytoplasm.
Which statement distinguishes between the roles of free and bound ribosomes?
Free ribosomes synthesize proteins for use inside the cell, whereas bound ribosomes synthesize proteins mainly for export.
Free ribosomes synthesize proteins mainly for export, whereas bound ribosomes synthesize proteins for use inside the cell.
Free ribosomes synthesize proteins, whereas bound ribosomes do not.
Bound ribosomes synthesize proteins, whereas free ribosomes do not.
Outline the functions of rough endoplasmic reticulum and Golgi apparatus.
The image shows an electron micrograph of pancreatic exocrine cells.
What is the role of the vesicles shown in the micrograph?
To transport hormones between the rough endoplasmic reticulum and the Golgi apparatus
To store glycogen when blood glucose levels are high
To move enzymes out of the cell by exocytosis
To digest cellulose
