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BIO 140 Human Biology I - Questions and Solutions

Eukaryotic Cells - Solutions

Review Questions

1. Which of the following is surrounded by two phospholipid bilayers?

  1. the ribosomes
  2. the vesicles
  3. the cytoplasm
  4. the nucleoplasm

2. Peroxisomes got their name because hydrogen peroxide is:

  1. used in their detoxification reactions
  2. produced during their oxidation reactions
  3. incorporated into their membranes
  4. a cofactor for the organelles’ enzymes

3. In plant cells, the function of the lysosomes is carried out by __________.

  1. vacuoles
  2. peroxisomes
  3. ribosomes
  4. nuclei

4. Which of the following is found both in eukaryotic and prokaryotic cells?

  1. nucleus
  2. mitochondrion
  3. vacuole
  4. ribosomes

 

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Critical Thinking Questions

1. You already know that ribosomes are abundant in red blood cells. In what other cells of the body would you find them in great abundance? Why?

Solution: Ribosomes are abundant in muscle cells as well because muscle cells are constructed of the proteins made by the ribosomes.

2. What are the structural and functional similarities and differences between mitochondria and chloroplasts?

Solution: Both are similar in that they are enveloped in a double membrane, both have an intermembrane space, and both make ATP. Both mitochondria and chloroplasts have DNA, and mitochondria have inner folds called cristae and a matrix, while chloroplasts have chlorophyll and accessory pigments in the thylakoids that form stacks (grana) and a stroma.

 

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OpenStax, Eukaryotic Cells. OpenStax CNX. Feb 25, 2016 http://cnx.org/contents/14f17ea6-1853-4b32-a834-576eb6dfeb67@14. © Feb 25, 2016 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License 4.0 license.