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Chapter 3Study Guide – Answer Sheet
1. Which organelles release chemicals that break down large food particles into smaller ones?
A) endoplasmic reticulum B) Golgi bodies C) lysosomes D) vacuoles
2. Which organelle is the control center of a cell?
A) mitochondrion B) ribosome C) nucleus D) chloroplast
3. Cells in many celled organisms
A) all look the same B) all have the same structure
C) are often quite different from each other D)are the same size in every part of the organism
4. What is the total magnification of a microscope with two lens when one lens has a magnification of 15, and the other lens has a magnification of 30?
A) 15 B) 30 C) 45 D) 450
5. Specialized cells are found only in
A) animals B) single-celled organism C) bacteria D) many celled organism
6. How does magnification occur in an electron microscope?
A) An electron beam creates a high resolution image B) light is reflected by an electron beam.
C) An electron beam makes the object become larger. D) light is changed into electrons by a convex lens
7. What does the term resolution refer to?
A) how sharp an image is B) how big an image can be
C) how many lenses a microscope uses D) how much light is needed to see an image
8. Which organelles produce most of the energy needed by a cell?
A) mitochondria B) chloroplasts C) ribosomes D) golgi bodies
9. Which organelles produce proteins in the cell?
A) Golgi bodies B) chloroplasts C) ribosomes D) vacuoles
10. How does a bacteria cell differ from a plant or animal cell?
A) It is larger B) it does not have a nucleus C) It has no cytoplasm D) It has no organelles
11. Which organelles are only found in plant cells??
A) endoplasmic reticulum B) Golgi bodies C) chloroplasts D) ribosomes
Turn Over
12. Which term refers to the movement of materials through a cell membrane when energy is required
A) osmosis B) diffusion C) active transport D) passive transport
13. Which term refers to the movement of water molecules through a selectively permeable membrane?
A) osmosis B) engulfing C) active transport d) passive transport
14.All organic compounds contain the element
A) water B) oxygen C) carbon D) nitrogen
15. Why is water important for a cell?
A) Water is the main ingredient in DNA B) water is an essential organic compound for the body
C) Most chemical reactions in cells require water D) all proteins require water to function
16. The water in a cell
A) allows the temperature of the cell to change rapidly B) prevents chemical reactions from taking place C) helps the cell keep its size and shape D) keeps substances from moving in and out of cells
17. Which of the following statements is NOT part of the cell theory?
A) Cells are the basic unit of structure and function in living things
B) All cells are produced from other cells
C) Only animals are composed of cells
D) All living things are composed of cells
18. DNA and RNA are
A) lipids B) enzymes C) amino acid D) nucleic acid
19. Which are NOT organic compounds?
A) proteins B) carbohydrates C)water D) lipids
20. Which term refers to the movement of molecules from an area of higher concentration to an area of lower concentration?
A) collision B) diffusion C) active transport d) concentration
21. Which term refers to proteins that speed up chemical reactions in living things?
A) carbohydrate B) enzyme C) amino acid D) nucleic acid
22. Which term refers to the movement of materials through a cell membrane without using energy?
A) concentration B) collision C) active transport D) passive transport
23. Which organelles store food and other materials needed by the cell?
A) mitochondria B) chloroplasts C) ribosomes D) vacuoles
24 The gel like fluid between the cell membrane and the nucleus in which many different organelles are found is called.
A) Chloroplasts B) Cell Membrane C) Vacuole D) Cytoplasm
25. Which of the following statements is part of the cell theory?
A) Only plants are composed of cells
B) All cells are produced from other cells
C) Cells can be produced from nonliving matter
D) Cells are one of several basic units of structure and function in living things