1. Which statement about eukaryotic chromosomes is not true?
a. They sometimes consist of two chromatids.
b. They sometimes consist of a single chromatid.
c. They normally possess a single centromere.
d. They consist of proteins.
e. They are clearly visible as defined bodies under the light microscope.
2. Nucleosomes a. are made of chromosomes.
b. consist entirely of DNA.
c. consist of DNA wound around a histone core.
d. are present only during mitosis.
e. are present only during prophase.
3. Which statement about the cell cycle is not true?
a. It consists of mitosis and interphase.
b. The cell's DNA replicates during G1.
c. A cell can remain in G1 for weeks or much longer.
d. Proteins are formed throughout all subphases of interphase.
e. Histones are synthesized primarily during S phase.
4. Which statement about mitosis is not true?
a. A single nucleus gives rise to two identical daughter nuclei.
b. The daughter nuclei are genetically identical to the parent nucleus.
c. The centromeres separate at the onset of anaphase.
d. Homologous chromosomes synapse in prophase.
5. Which statement about cytokinesis is true?
a. In animals, a cell plate forms.
b. In plants, it is initiated by furrowing of the membrane.
c. It generally immediately follows mitosis.
e. It is the division of the nucleus.
6. Apoptosis a. occurs in all cells.
b. involves the cell membrane dissolving.
c. does not occur in an embryo.
d. involves a series of programmed events for cell death.
e. is not involved with cancer.
7. In meiosis, a. meiosis II reduces the chromosome number from diploid to haploid.
b. DNA replicates between meiosis I and II.
c. the chromatids that make up a chromosome in meiosis II are identical.
d. each chromosome in prophase I consists of four chromatids.
e. homologous chromosomes separate from one another in anaphase I.
8. In meiosis, a. a single nucleus gives rise to two daughter nuclei.
b. the daughter nuclei are genetically identical to the parent nucleus.
c. the centromeres separate at the onset of anaphase I.
d. homologous chromosomes synapse in prophase I.
e. no spindle forms.
9. A plant has a diploid chromosome number of 12. An egg cell of the plant has 5 chromosomes. The most probable explanation of this is a. normal mitosis.
b. normal meiosis.
c. nondisjunction in meiosis I.
d. nondisjunction in meiosis I and II.
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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.