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10 questions
When comparing plants and pebbles, a student notices that the sizes of the plants increases, while the sizes of the pebbles remain the same. The pebbles are classified as nonliving.
Which criteria does the student use as the basis for the classification?
ability grow
ability to move
ability to reproduce
ability to respond to stimuli
Which of these characteristics would disqualify a newly discovered biological structure from being called a cell?
It cannot exchange materials with its environment.
It does not contain membrane-bound organelles.
It lacks a method for moving and gathering food.
It has no stiff outer layer for support and protection.
Theodor Schwann discovered that animal tissues are made of cells. Which part of the cell theory is based in part on Theodor Schwann's findings?
All organisms are made up of cells.
New cells come from preexisting cells.
All organisms are composed of one or more cells.
Cells produce proteins for the functioning of organisms.
Rudolph Virchow rejected the idea that living things could generate spontaneously from nonliving things. Which part of the cell theory supports Virchow's position?
All cells arise from preexisting cells.
All organisms are made up of cells.
Cells exist in various forms and sizes.
Cells are the fundamental units of life.
Which level of organization is formed when similar cells specialized to perform a specific function come together?
organ
organism
system
tissue
What evidence would prevent scientists from classifying viruses as living organisms?
Some viruses use RNA (not DNA) as genetic material.
Some viruses do not contain any proteins or carbohydrates.
Viruses reproduce asexually.
Viruses require a host cell to reproduce.
Which of the following statements is correct?
Proteins function in long term energy storage.
Lipids function in cellular processes and homeostasis.
Carbohydrates function in short term energy storage.
Nucleic acids function in cellular process and homeostasis.
The enzyme pepsin has an optimal pH in the range of 1-2. The enzyme lipase has an optimal pH in the range of 4-5. The enzyme amylase has an optimal pH range of 7.2-7.4.
What can be inferred about the effectiveness of enzymes?
Enzymes have specific substrates and work best in any pH.
Enzymes do not have specific substrates and work best in any pH.
Enzymes have specific substrates, so they work best within a small range of pH.
Enzymes do not have specific substrates, so they work best within a small range of pH.
What will likely happen if the Golgi bodies are absent in a cell?
The cell will not be able to manufacture proteins.
Macromolecules synthesized by the cell will not be modified and packaged.
The cell will not be able to anchor the organelles it contains.
Important organic compounds will not be stored in the cell for later use.
Which of the following makes up the cell membrane?
carrier proteins
phospholipid bilayer
phosphorous bilayer
receptor proteins
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