Topic 1.2: Ultrastructure of Cells

The electron micrograph shows a section through a cell. What is the name of the cell component labelled Y?

• Golgi apparatus

• Nucleus

• Cytoplasm

• Vacuole

The image shows an electron micrograph of part of a cell. Which features do the two structures labelled X and Y have in common?

• They are surrounded by a double membrane.

• They contain 70S ribosomes.

• They contain naked DNA.

• They are only found in leaf cells.

Which structures are found only in prokaryotic cells?

• Ribosomes

• Pili

• Cell walls

• Flagella

The electron micrograph shows part of a cell. Which organelle is the site of aerobic respiration?

• A

• B

• C

• D

Where could genes be located in a prokaryotic cell?

• A

• B

• C

• D

The image shows an electron micrograph of a cell. Which organelles correspond to the labels in the electron micrograph of this cell?

• A

• B

• C

• D

What evidence from the image of Paramecium indicates whether the organism is a prokaryote or a eukaryote?

• Compartments in the cell indicate that it is a eukaryote.

• No nucleus indicates that the cell is a prokaryote.

• Lack of a cell wall indicates that the cell is a eukaryote.

• It is a unicellular organism, so it must be a prokaryote.

The following electron micrograph shows part of a palisade mesophyll cell. Which of the labelled structures controls the exchange of substances to and from the cell?

• A

• B

• C

• D

Which organelle is involved in generating vesicles destined for the cell membrane?

• Golgi apparatus

• Smooth endoplasmic reticulum

• Rough endoplasmic reticulum

• Lysosome

The image shows an electron micrograph of mesophyll cells. What is the name of the structure labelled X?

• Cytoplasm

• Mitochondrion

• Nucleus

• Chloroplast