Chapter 4 Diagnostic Test: Cells and Energy - Weebly

Biology 1 Cells and Energy Chapter 4 Diagnostic Test: ... your cells to provide a source of energy? ... Biology 2 Cells and Energy Diagnostic Test con...

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Name: ______________________________Class: _________________ Date: _________________

Chapter 4 Diagnostic Test: Cells and Energy Choose the letter of the best answer.

_____ 1. A hydrogen atom that loses its electron and becomes positively charged is called a(n) a. element. c. molecule. b. ion. d. acid. _____ 2. Which property of water helps cells maintain a constant temperature, even when chemical reactions release energy? a. pH c. vapor pressure b. adhesion d. specific heat _____ 3. What type of carbon-based molecule is the first to be broken down by your cells to provide a source of energy? a. carbohydrate c. protein b. fat d. amino acid _____ 4. Which of the following diagrams in Figure 4.1 could be used to illustrate diffusion?

FIG. 4.1

a. A b. B

c. C d. D

_____ 5. Which organelle converts molecules from the food you eat into usable energy? a. chloroplast c. Golgi apparatus b. mitochondrion d. lysosome

Copyright by McDougal Littell, a division of Houghton Mifflin Company

Biology

1

Cells and Energy

Name: ______________________________Class: _________________ Date: _________________

Diagnostic Test continued

_____ 6. Which of the following does a plant cell have that an animal cell does not? a. cytoplasm c. nucleus b. centriole d. chloroplasts _____ 7. Cells can be separated into two main categories, eukaryotic and prokaryotic, based on their a. type of DNA. c. enzymes. b. cell membranes. d. internal structures. _____ 8. The chemical reactions that take place inside cells require water to act as a a. catalyst. c. enzyme. b. solvent. d. base. _____ 9. The reaction shown in Figure 4.2 happens faster than it would if the substance labeled A were not present. What is substance A?

FIG. 4.2

a. an enzyme b. a gradient

c. a phospholipid d. an organelle

_____ 10. Photosynthesis is an endothermic reaction because it a. releases energy as heat rather than as light. b. absorbs more energy than it releases. c. generates more heat than cellular respiration does. d. does not require any activation energy.

Copyright by McDougal Littell, a division of Houghton Mifflin Company

Biology

2

Cells and Energy