AQA A level Cells revision

What is the structure that contains chromosomes in eukaryotic cells?

• Lysosomes

• Golgi apparatus

• Nucleus

• Mitochondria

Which organelle is responsible for photosynthesis in plants and algae?

• Mitochondria

• Ribosomes

• Chloroplasts

• Endoplasmic reticulum

What is the main difference between prokaryotic and eukaryotic cells?

• Prokaryotic cells lack membrane-bound organelles

• Prokaryotic cells have a nucleus

• Eukaryotic cells lack a cell wall

• Eukaryotic cells have smaller ribosomes

What is the role of lysosomes?

• Photosynthesis

• Protein synthesis

• Releasing lysozymes

• DNA replication

What process do eukaryotic cells use to divide and produce two daughter cells?

• Binary fission

• Mitosis

• Meiosis

• Osmosis

What is the structure of virus particles?

• Cell wall, cytoplasm, and nucleus

• Genetic material, capsid, and attachment protein

• Membrane-bound organelles

• Circular DNA and plasmids

What is the difference between magnification and resolution?

• Magnification is the clarity of the image, while resolution is the size of the image

• Magnification and resolution both refer to the clarity of the image

• Magnification is the size of the image, while resolution is the clarity of the image

• Magnification and resolution both refer to the size of the image

What is the principle of cell fractionation and ultracentrifugation?

• To identify starch grains in plant cells

• To separate cell components

• To magnify cell components

• To measure the size of cell components

During which phase of the cell cycle does DNA replication occur?

• Anaphase

• Metaphase

• Prophase

• Interphase

What is the basic structure of all cell membranes?

• Rigid layer of carbohydrates

• Fluid-mosaic model

• Double layer of proteins

• Single layer of phospholipids