MCAS Review 2

The diagram show the structure of a bacterial cell

Which of the following distinguishes this bacterial cell from eukaryotes?

• The bacterial cell is a unicellular organism and all eukaryotes are multicellular

• Ribosomes are found in the cytoplasm of the bacterial cell, and eukaryotes do not have ribosomes

• The bacterial cell has both a cell membrane and a cell wall, eukaryotes only have cell membranes

• DNA in the bacterial cell is always in contact with the cytoplasm, and all eukaryotes have DNA located inside

Lithops are multicellular organisms found in sandy soil in deserts. They the large, central vacuoles in their cells that store water. Which of the following best clarifies lithrops?

• They are bacteria because they store water

• They are animals because they are multicellular

• They are fungi because they are found in sandy soil

• They are plants because they have large central vacuoles

A researcher is studying a sample of cells taken from an organism found in the Arctic Ocean. The researcher makes the following observations:

-They do not make their own food

-They each have a nucleus

-They do not have cell walls.

Based on these observations, the organism should be classified as which of the following?

• a plant

• a fungus

• an animal

• a bacterium

Which of the following distinguishes viruses from bacteria?

• viruses lack mitochondria

• viruses lack genetic material

• viruses are unable to accumulate mutations

• viruses are unable to reproduce outside of host cells

Several parts of an animal cell are involved in the processes of protein synthesis, packaging and export. Which of the following correctly places the cell parts in the order in which they are involved?

• nucleus--> vacuole--> cell membrane

• mitochondria--> vacuole-->cell membrane

• ribosome--> endoplasmic reticulum--> Golgi complex--> cell membrane

• lysosome--> endoplasmic reticulum--> golgi complex--> cell membrane

Which of the following completes the table?

• 
• 
• 
• 

A student looks at a cell under a microscope. Which of the following observations would indicate that the cell is a plant rather than an animal?

• nucleus is located inside of the cell

• numerous cilia on the outside of the cell

• chloroplasts in the cytoplasm of the cell

• a thin membrane around the edge of the cell

In which of the following ways does the plasma membrane regulate the entry of molecules into the cell?

• the membrane allows only certain molecules to move into the cell

• the membrane destroys most molecules so that they do not enter the cell

• the membrane changes only certain molecules into ions before they move into the cell

• the membrane allows most molecules to transfer energy to the cell without enter the cell

Pathogens cause disease in organisms. The table below shows characteristics of four pathogens.

• pathogens 1 and 2

• pathogens 1 and 3

• pathogens 2 and 4

• pathogens 3 and 4

The illustration shows the external features of a prokaryotic organism.

Which of the following can be concluded about the internal cellular contents of this prokaryote?

• The cell does not contain ribosomes

• the cell does not contain a nucleus

• the cell contains mitochondria

• the cell contains a vacuole