BIO 351 Module 1 Molecular Biology Concepts Exam Prep 2026
| Most Frequently Tested Questions | Graded A+
1. How do the cellular processes of determination and differentiation differ?
Determination and differentiation are interchangeable terms for the
same process.
Determination involves the products of maternal effect genes, and
differentiation involves the resulting changes to offspring phenotype.
Determination is the development of cells early in embryonic growth,
and differentiation refers to cell development during adulthood.
Determination is a normal part of the cell cycle, and differentiation is
an abnormal process associated with the development of cancer.
Determination is the process by which a cell is locked into becoming
a specialized type, and differentiation is the subsequent process of
actually becoming specialized.
2. In a study of a gene with multiple exons, if researchers find that certain empty
exons are retained during RNA splicing, what might this indicate about the
gene's regulation?
It confirms the gene is only expressed in certain tissues.
It may indicate alternative splicing mechanisms are at play.
It indicates that the gene is undergoing mutations.
It suggests the gene is non-functional.
3. Describe the physiological implications of hypogonadotropic hypogonadism
on reproductive health.
Hypogonadotropic hypogonadism only affects males and has no
impact on females.
, Hypogonadotropic hypogonadism has no effect on reproductive
health.
Hypogonadotropic hypogonadism results in reduced sex hormone
levels, which can lead to infertility and developmental issues.
Hypogonadotropic hypogonadism causes an increase in sex drive
and fertility.
4. What is the significance of induction in developmental biology?
It provides a tissue with the competence to respond to specific
signals
It controls the organism's overall growth
It determines the gender of the organism
It regulates metabolic processes
5. If a researcher were to inhibit Wnt signaling in the endosteal niche, what
potential outcome could be expected regarding stem cell behavior?
Decreased self-renewal of stem cells
Increased differentiation of stem cells
No change in stem cell behavior
Enhanced proliferation of stem cells
6. Induction occurs when
two tissues come into contact, causing the release of transcription
factors.
nuclear genes are lost in some tissues.
factors are unequally distributed in the cytoplasm of an egg.
, one cell contacts another and fails to alter its developmental fate.
a cell or tissue sends a chemical signal to another, causing
differentiation of that cell or tissue.
7. Describe how homology arms contribute to the efficiency of gene editing
techniques.
Homology arms prevent the degradation of the edited RNA.
Homology arms provide regions of similarity that allow for precise
integration of the edited sequence into the target DNA.
Homology arms are involved in the splicing of RNA.
Homology arms are used to create mutations in the target gene.
8. What event initiates the cortical granule reaction during the process of
fertilization?
Sperm entry into the egg
Cortical granule release
Egg activation
Meiotic completion
9. Describe the main purpose of a Western blot in the context of molecular
biology.
A Western blot is used to measure enzyme activity.
A Western blot is used to analyze RNA sequences.
A Western blot is used to detect and quantify specific proteins in a
sample.
A Western blot is used to visualize DNA fragments.
, 10. What is the primary outcome of the PAR/aPKC signaling pathway in cellular
processes?
Cell polarity establishment
Cell division
Gene expression activation
RNA splicing
11. When making transgenic mice with a knockout mutation generated by gene
replacement by homologous recombination, what does the negative
selection step do?
It selects against cultured cells that did not undergo homologous
recombination.
It selects against embryos that are not a chimeric mix of transgenic
and non-transgenic cells.
It selects against mice that are a chimeric mix of transgenic and non-
transgenic cells.
It selects against cells that are not embryonic stem cells.
It selects against cultured cells that did not take up a selectable
marker gene.
12. In a gene editing experiment, if a researcher uses both positive and negative
selection markers, what outcome can they expect?
They can isolate a population of cells that have successfully
integrated the desired genetic material while eliminating those that
have not.
They will enhance the overall mutation rate in the cell population.
They will create a mixed population of modified and unmodified cells.
| Most Frequently Tested Questions | Graded A+
1. How do the cellular processes of determination and differentiation differ?
Determination and differentiation are interchangeable terms for the
same process.
Determination involves the products of maternal effect genes, and
differentiation involves the resulting changes to offspring phenotype.
Determination is the development of cells early in embryonic growth,
and differentiation refers to cell development during adulthood.
Determination is a normal part of the cell cycle, and differentiation is
an abnormal process associated with the development of cancer.
Determination is the process by which a cell is locked into becoming
a specialized type, and differentiation is the subsequent process of
actually becoming specialized.
2. In a study of a gene with multiple exons, if researchers find that certain empty
exons are retained during RNA splicing, what might this indicate about the
gene's regulation?
It confirms the gene is only expressed in certain tissues.
It may indicate alternative splicing mechanisms are at play.
It indicates that the gene is undergoing mutations.
It suggests the gene is non-functional.
3. Describe the physiological implications of hypogonadotropic hypogonadism
on reproductive health.
Hypogonadotropic hypogonadism only affects males and has no
impact on females.
, Hypogonadotropic hypogonadism has no effect on reproductive
health.
Hypogonadotropic hypogonadism results in reduced sex hormone
levels, which can lead to infertility and developmental issues.
Hypogonadotropic hypogonadism causes an increase in sex drive
and fertility.
4. What is the significance of induction in developmental biology?
It provides a tissue with the competence to respond to specific
signals
It controls the organism's overall growth
It determines the gender of the organism
It regulates metabolic processes
5. If a researcher were to inhibit Wnt signaling in the endosteal niche, what
potential outcome could be expected regarding stem cell behavior?
Decreased self-renewal of stem cells
Increased differentiation of stem cells
No change in stem cell behavior
Enhanced proliferation of stem cells
6. Induction occurs when
two tissues come into contact, causing the release of transcription
factors.
nuclear genes are lost in some tissues.
factors are unequally distributed in the cytoplasm of an egg.
, one cell contacts another and fails to alter its developmental fate.
a cell or tissue sends a chemical signal to another, causing
differentiation of that cell or tissue.
7. Describe how homology arms contribute to the efficiency of gene editing
techniques.
Homology arms prevent the degradation of the edited RNA.
Homology arms provide regions of similarity that allow for precise
integration of the edited sequence into the target DNA.
Homology arms are involved in the splicing of RNA.
Homology arms are used to create mutations in the target gene.
8. What event initiates the cortical granule reaction during the process of
fertilization?
Sperm entry into the egg
Cortical granule release
Egg activation
Meiotic completion
9. Describe the main purpose of a Western blot in the context of molecular
biology.
A Western blot is used to measure enzyme activity.
A Western blot is used to analyze RNA sequences.
A Western blot is used to detect and quantify specific proteins in a
sample.
A Western blot is used to visualize DNA fragments.
, 10. What is the primary outcome of the PAR/aPKC signaling pathway in cellular
processes?
Cell polarity establishment
Cell division
Gene expression activation
RNA splicing
11. When making transgenic mice with a knockout mutation generated by gene
replacement by homologous recombination, what does the negative
selection step do?
It selects against cultured cells that did not undergo homologous
recombination.
It selects against embryos that are not a chimeric mix of transgenic
and non-transgenic cells.
It selects against mice that are a chimeric mix of transgenic and non-
transgenic cells.
It selects against cells that are not embryonic stem cells.
It selects against cultured cells that did not take up a selectable
marker gene.
12. In a gene editing experiment, if a researcher uses both positive and negative
selection markers, what outcome can they expect?
They can isolate a population of cells that have successfully
integrated the desired genetic material while eliminating those that
have not.
They will enhance the overall mutation rate in the cell population.
They will create a mixed population of modified and unmodified cells.
