Unit 2 Summative Assessment (Cells, Photosynthesis, Respiration)

Which are the main points of the cell theory? Select all that apply.

• Cells are the basic units of structure and function in living things.
• New cells are produced from existing cells.
• All cells enclose their DNA within a nucleus.
• All living things are made up of cells.

The invention of which instrument allowed scientists to discover cells?

• Eyeglasses
• Magnifying Glass
• Microscope
• Telescope

Which describes a light microscope but not an electron microscope?

• Uses a beam of light to produce magnified images
• Has very high magnification power
• Can be used to study cells and cell structure
• Requires a computer to operate

Which model shows a prokaryotic cell?

• I
• II
• III
• IV

Which describes a eukaryotic cell, but not a prokaryotic cell?

• Uses DNA to control cell activities
• Is surrounded by a cell membrane
• Makes and Uses Proteins
• Contains DNA in a nucleus

Josey wants to look at the cells of an onion under a light microscope. She peels off a thin, transparent layer of onion and places it on a microscope slide. Josey places the sample on the microscope stage, looks through the eyepiece, and adjusts the stage to focus the image. However, she is unable to see any details of the cells. Which of the following solutions will best enable Josey to see the onion cells in detail?

• Josey should use a thicker piece of onion for her sample.
• Josey should place her onion sample in a vacuum.
• Josey should place a drop of water on her sample.
• Josey should apply a stain, such as iodine, to her sample.

Which of these structures are present in plant cells, but not animal cells?

• Cell wall and cell mambrane
• Cell membrane and mitochondria
• Cell wall and chloroplasts
• Mitochondria and chloroplasts

A student is developing a model to show how most proteins are synthesized in animal cells. Which organelles would be LEAST useful for the student to include in the model?

• Ribosomes
• Endoplasmic Reticulum
• Golgi Apparatus
• Chloroplasts

Which cell structure is correctly matched with its function?

• Vacuole: stores material inside the cell
• Cell Membrane: divides the cell into two halves
• Lysosome: manufactures proteins
• Ribosome: packages and modifies proteins

The pancreas is an organ present in some animals. It produces enzymes that are used in the digestive system of the animal. Which cell structure is likely to be abundant inside pancreas cells?

• Cell walls, because cell walls cannot be digested by enzymes
• Chloroplasts, because chloroplasts provide the energy for making enzymes
• Nuclei, because nuclei contain the instuctions for synthesizing enzymes
• Ribosomes, because enzymes are synthesized on ribosomes