IB Biology 1.2

The electron micrograph shows a section through a cell and refers to the question below.

What is the name of the cell component labelled Y?

• A. Golgi Apparatus

• B. Nucleus

• C. Cytoplasm

• D. Vacuole

What do chloroplasts and mitochondria have in common?

• A. Both are found in the cells of Filicinophyta.

• B. Both contain grana.

• C. Both occur in all eukaryotic cells.

• D. Both are found in a Paramecium.

What is the structure labeled X in the electron micrograph of a rat liver cell?

• A. Ribosome

• B. Lysosome

• C. Mitochondrion

• D. Nucleus.

What is a function of the plant cell wall?

• A. Formation of vesicles for transport of large molecules

• B. Prevention of excessive water uptake

• C. Communication with other cells by means of glycoproteins

• D. Active transport of ions

What distinguishes prokaryotic cells from eukaryotic cells?

• A.

• B.

• C.

• D.

Animal cells often secrete glycoproteins as extracellular components. What is a role of these glycoproteins?

• A. Adhesion

• B. Additional energy reserve

• C. Membrane fluidity

• D. Water uptake

The image represents an Escherichia coli.

What is the function of structure X?

• A. Active transport

• B. Attachment

• C. Binary fission

• D. Cell respiration

Which structure is found in E. coli, but not in a eukaryotic cell?

• A. Cell wall

• B. Endoplasmic reticulum

• C. Cytoplasm

• D. Pili

A cell has cytoplasm, a cell wall, naked DNA and ribosomes. Based on this information, what type of cell could this be?

• A. A cell from a pine tree

• B. A grasshopper cell

• C. A human red blood cell

• D. A bacterium

If a mitochondrion has a length of 5 µm and a student’s drawing of the mitochondrion is 10 mm, what is the magnification of the drawing?

• A. × 0.0005

• B. × 0.5

• C. × 200

• D. × 2000