MCB 250 Final Exam Review: LON-CAPA
with complete solutions 2025-2026
How can a single gene be expressed in more than one tissue? - correct answer
✔✔The gene has multiple, modular enhancers that can be bound separately by
different transcription factors in the relevant tissues
How are certain mRNAs localized to one part of an egg or early embryo? - correct
answer ✔✔The mRNAs are bound by adapter proteins that are moved by motor
proteins along the cytoskeleton
What does a kinase do? - correct answer ✔✔Add a phosphate group onto a
serine, threonine, or tyrosine
Ligands that activate the Jak/STAT signal transduction pathway include:
Kinases
Growth factors
Cytokines
Insulin - correct answer ✔✔Cytokines
What do Jak/STAT and MAPK signaling have in common? - correct answer
✔✔Receptor dimerization followed by autophosphorylation
What happens at the maternal-to-zygotic transition across species? - correct
answer ✔✔Activation of transcription from the zygotic genome
, Nusslein-Volhard and Wieschaus conducted a genetic screen hoping to
understand: - correct answer ✔✔How the body plan of the embryo is established
The signal that localizes the bicoid mRNA is found: - correct answer ✔✔In the
3'UTR
What is the transcription factor that activates genes that specify ventral identity in
the Drosophila embryo? - correct answer ✔✔Dorsal
The study of which model organism led to the discovery of transposons? - correct
answer ✔✔Maize
The ends of a transposon consist of: - correct answer ✔✔Inverted repeats
Mobilization of a transposon can result in:
Incorporation into an existing gene to form a new gene
Small changes that influence the evolution of an organism
Insertional mutagenesis
All of the above - correct answer ✔✔All of the above
What model organism hosts P element transposons? - correct answer ✔✔Fruit
flies
Which body part is affected by the marker gene used in transgenic experiment
discussed? - correct answer ✔✔Eye
with complete solutions 2025-2026
How can a single gene be expressed in more than one tissue? - correct answer
✔✔The gene has multiple, modular enhancers that can be bound separately by
different transcription factors in the relevant tissues
How are certain mRNAs localized to one part of an egg or early embryo? - correct
answer ✔✔The mRNAs are bound by adapter proteins that are moved by motor
proteins along the cytoskeleton
What does a kinase do? - correct answer ✔✔Add a phosphate group onto a
serine, threonine, or tyrosine
Ligands that activate the Jak/STAT signal transduction pathway include:
Kinases
Growth factors
Cytokines
Insulin - correct answer ✔✔Cytokines
What do Jak/STAT and MAPK signaling have in common? - correct answer
✔✔Receptor dimerization followed by autophosphorylation
What happens at the maternal-to-zygotic transition across species? - correct
answer ✔✔Activation of transcription from the zygotic genome
, Nusslein-Volhard and Wieschaus conducted a genetic screen hoping to
understand: - correct answer ✔✔How the body plan of the embryo is established
The signal that localizes the bicoid mRNA is found: - correct answer ✔✔In the
3'UTR
What is the transcription factor that activates genes that specify ventral identity in
the Drosophila embryo? - correct answer ✔✔Dorsal
The study of which model organism led to the discovery of transposons? - correct
answer ✔✔Maize
The ends of a transposon consist of: - correct answer ✔✔Inverted repeats
Mobilization of a transposon can result in:
Incorporation into an existing gene to form a new gene
Small changes that influence the evolution of an organism
Insertional mutagenesis
All of the above - correct answer ✔✔All of the above
What model organism hosts P element transposons? - correct answer ✔✔Fruit
flies
Which body part is affected by the marker gene used in transgenic experiment
discussed? - correct answer ✔✔Eye
