Cells quiz A level biology

Which of these structures contains RNA but not DNA?

• nucleus

• mitochondrion

• chloroplast

• ribosome

Which of the following is a function of the Golgi apparatus?

• to aid endocytosis

• to make proteins from amino acids

• to synthesise ATP

• to make secretory products

What is the name given to the structures which penetrate the walls of adjacent plant cells?

• middle lamellae

• plasmodesmata

• pits

• channels

Cells in culture will absorb amino acids from the surrounding culture medium. If radioactively labelled glycine is provided in the culture medium, in which organelle will radioactivity be found first?

• ribosomes

• nucleus

• lysosomes

• Golgi apparatus

What resolution can be achieved with a light microscope?

• 20μm

• 2μm

• 0.2μm

• 0.02μm

Intestinal epithelial cells have observable “brush borders” seen on the cells. What are they?

• microvilli

• cilia

• flagella

• villi

What are centrioles involved in?

• lysosome formation

• intracellular digestion

• ribosome formation

• cell division

The _______ is responsible for the destruction of damaged cells?

Which of the following is concerned with the synthesis and transport of lipids and steroids in the cell?

• Rough ER

• Smooth ER

• Golgi

• Lysosome

When mitochondria are extracted from cells, they are usually kept in a 0.25 mol dm^-3 sucrose solution.

What is the purpose of the sucrose solution?

• it prevents the mitochondria from changing structure

• it acts as a source of food for respiration

• it is used as a solvent

• it maintains a constant pH by acting as a buffer