BIO 201 Exam 4 Study Guide |
Comprehensive Review & Practice
Questions | 2026/2027
Consider a skin cell and a neuron from the same individual. The DNA in the
nucleus of each of these cells is the same even though these cell types look
different and have different functions.
A. True
B. False - correct answer-A. True
Binding of a ligand to a receptor protein changes the conformation (i.e. shape) of
the receptor.
A. True
B. False - correct answer-A. True
Which of the following is TRUE regarding signal transduction pathways?
A. Signal transduction pathways amplify the effect of a signal molecule
B. Cells have many different receptors allowing them to respond to different
environmental signals
C. Signal transduction pathways convert a signal on a cell's surface to a specific
cellular response
D. A and B
E. A, B and C - correct answer-E. A, B and C
, Consider a pair of homologous chromosomes from a human skin cell. These
chromosomes are considered homologous because they have identical DNA
sequences.
A. True
B. False - correct answer-B. False
Consider a diploid cell that has 3 pairs of homologous chromosomes. How many
total chromatids would this cell have in G2 phase of the cell cycle?
A.3
B. 6
C. 12
D. 24 - correct answer-C. 12
Which of the following microtubules attach to sister chromatids in mitosis?
A. Astral microtubules
B. Polar microtubules
C. Kinetochore microtubules
D. A and B
E. B and C - correct answer-C. Kinetochore microtubules
Which of the following is NOT TRUE of signal transduction by an enzyme-linked
cell surface receptor?
A. Binding of the ligand to the extracellular domain results in a change in the
intracellular domain
B. Signal transduction may involve a phosphorylation cascade that stimulates
gene transcription
Comprehensive Review & Practice
Questions | 2026/2027
Consider a skin cell and a neuron from the same individual. The DNA in the
nucleus of each of these cells is the same even though these cell types look
different and have different functions.
A. True
B. False - correct answer-A. True
Binding of a ligand to a receptor protein changes the conformation (i.e. shape) of
the receptor.
A. True
B. False - correct answer-A. True
Which of the following is TRUE regarding signal transduction pathways?
A. Signal transduction pathways amplify the effect of a signal molecule
B. Cells have many different receptors allowing them to respond to different
environmental signals
C. Signal transduction pathways convert a signal on a cell's surface to a specific
cellular response
D. A and B
E. A, B and C - correct answer-E. A, B and C
, Consider a pair of homologous chromosomes from a human skin cell. These
chromosomes are considered homologous because they have identical DNA
sequences.
A. True
B. False - correct answer-B. False
Consider a diploid cell that has 3 pairs of homologous chromosomes. How many
total chromatids would this cell have in G2 phase of the cell cycle?
A.3
B. 6
C. 12
D. 24 - correct answer-C. 12
Which of the following microtubules attach to sister chromatids in mitosis?
A. Astral microtubules
B. Polar microtubules
C. Kinetochore microtubules
D. A and B
E. B and C - correct answer-C. Kinetochore microtubules
Which of the following is NOT TRUE of signal transduction by an enzyme-linked
cell surface receptor?
A. Binding of the ligand to the extracellular domain results in a change in the
intracellular domain
B. Signal transduction may involve a phosphorylation cascade that stimulates
gene transcription
