GS 102 Concepts in Science: Biology
Fall 2008

These questions have appeared on previous exams for GS102. The questions are posted here to give you an idea of what types of questions are on my exams. They are representative of the level of detail you will see on your exams. The questions here, however, do not represent all of the content covered in the exams. Refer to the study questions for guidelines about content.

Chapter 5
Chapter 8
Chapter 9
Chapter 10
Osmosis Lab

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Chapter 5

An animal cell immersed in a hypotonic solution will

1. gain water and burst
2. neither gain nor lose water
3. lose water and shrink
4. not enough information to determine

In which of the following processes does solute transport occur from a region of low solute concentration to a region of high solute concentration?

1. diffusion
2. active transport
3. facilitated diffusion
4. endocytosis

Which one of the following processes does not require input of energy?

1. active transport
2. exocytosis
3. facilitated diffusion
4. endocytosis

Chapter 8

In which stage of the cell cycle is the DNA replicated?

1. mitosis
2. S phase
3. telophase
4. G2

For each event listed below, list the phase of mitosis in which it occurs. In each blank, write P for prophase, M for metaphase, A for anaphase, or T for telophase.

1. _____chromosomes line up
2. _____chromosomes decondense
3. _____nuclear envelope disappears
4. _____sister chromatids split
5. _____mitotic spindle apparatus forms
6. _____nucleolus reappears

Which of the following is not a difference between a normal cell and a transformed cell? (Remember that transformed cells can lead to cancer.)

1. normal cells exhibit anchorage dependence, and transformed cells do not
2. normal cells exhibit contact inhibition, and transformed cells do not
3. transformed cells are less differentiated than normal cells
4. the cell cycle is not regulated in normal cells
5. all of the above are differences between normal cells and transformed cells

The role of meiosis II in meiosis is to

a) separate homologous chromosomes so the cell can become haploid
b) separate sister chromatids so the chromosomes are no longer replicated
c) separate the maternal and paternal chromosomes
d) replicate the DNA

In metaphase I of meiosis,

For each of the following phases of meiosis, list whether a cell at the end of that phase will be diploid (D) or haploid (H).

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Chapter 9

According to independent assortment, the genotype AABb produces _______________ genetically distinct kind(s) of gametes.

The ABO blood group system is an example of

Hemophilia is a sex-linked trait found on the X chromosome. A man with hemophilia mates with a woman without hemophilia. Half of their daughters have hemophilia, and half of their sons have hemophilia. What is the genotype of the mother?

a) A
b) AB
c) B
d) O

Which of the following most accurately describes DNA replication?

1. An enzyme reads the DNA double helix without unwinding it and copies it, building a new DNA molecule with both strands made of new nucleotides.
2. The DNA denatures, and the bonds holding the nucleotides together break apart. The new DNA is assembled from nucleotides in the original DNA and new nucleotides, so each strand of the new molecule is made up of old and new nucleotides.
3. The double helix unwinds, and each single strand is used as a template to construct complementary strands of DNA, so each new DNA molecule is made up of one old strand and one new strand of DNA.
4. None of the above accurately describes DNA replication.

In the double helix structure of DNA, the _____________ group of one nucleotide is bonded to the _____________ group of the next nucleotide in the chain.

1. phosphate. . . sugar
2. phosphate. . . phosphate
3. sugar. . . sugar
4. nitrogenous base. . .nitrogenous base

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