True or False

Determine which five of the following statements are false, and briefly explain why.

  1. Proteins destined to be exported from a cell are made by ribosomes on the surface of the Golgi complex.
  2. Each of a cell's products—such as steroids, carbohydrates, and phospholipids—is encoded by a separate gene.
  3. A molecule of RNA would weigh about half as much as a segment of DNA of the same length.
  4. Each amino acid of a protein is represented by a three-base sequence in DNA.
  5. From the end of the S phase until anaphase, a chromosome has two chromatids.
  6. The law of complementary base pairing describes the way the bases in an mRNA codon pair up with the bases of a tRNA anticodon during translation.
  7. Most of the DNA in a human cell does not code for any proteins.
  8. Some mutations are harmless.
  9. Males have only one sex chromosome whereas females have two.
  10. A gene can be transcribed by only one RNA polymerase at a time.

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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