Activities Quiz
1.

Which of these is responsible for initiating a signal-transduction pathway? (Activity 21C)

question #1

A
B
C
D
E


2.

What role does a transcription factor play in a signal-transduction pathway? (Activity 21C)

By binding to a plasma membrane receptor it initiates a cascade.
It relays a signal from the cytoplasm to the plasma membrane.
It activates relay proteins.
By binding to DNA it triggers the transcription of a specific gene.
It is a plasma membrane protein that binds signal molecules.


3.

Click on the diagram to start the video. Which of these, when activated by a signal-transduction pathway, moved from the cytoplasm to the nucleus of a cell? (Activity 21C)

relay protein
DNA
plasma membrane receptor protein
signal molecule
transcription factor


4.

Which of these is a membrane receptor? (Activity 21C)

question 4

A
B
C
D
E


5.

A signal transduction pathway is initiated when a _____ binds to a receptor. (Activity 21C)

G protein
tyrosine kinase
calmodulin
signal molecule
cyclic AMP


6.

A high concentration of bicoid protein at the opposite ends of a developing Drosophila embryo would result in the development of a _____. (Activity 21D)

two-headed fly
fly with a head growing out of its abdomen
fly with two abdomens
hermaphrodite
fly with legs growing out of its head


7.

The bicoid gene product is directly responsible for _____ in a developing Drosophila embryo. (Activity 21D)

the establishment of the right-left axis
vulval development
flower development
the establishment of the anterior-posterior axis
apoptosis


8.

The region of a Drosophila embryo with the highest concentration of bicoid protein will develop into the _____. (Activity 21D)

head
ovaries
vulva
homeobox
abdomen


9.

What triggers the translation of bicoid mRNA? (Activity 21D)

formation of the right-left axis of the developing embryo
fertilization of the egg
apoptosis
capacitation of sperm
formation of the anterior-posterior axis of the developing embryo


10.

The bicoid gene is a type of _____ gene. (Activity 21D)

segmentation
pair-rule
segment-polarity
egg-polarity
gap


11.

The region of a Drosophila embryo with a low concentration of bicoid protein will develop into the _____. (Activity 21D)

abdomen
male flowers
thorax
head
female flowers


12.

How does bicoid protein get into a fertilized egg? (Activity 21D)

exocytosis
phagocytosis
diffusion
pinocytosis
receptor-mediated endocytosis


13.

Bicoid mRNA is translated in _____. (Activity 21D)

Sertoli cells
the fertilized egg
sperm cells
chimera cells
nurse cells


14.

Which of these regions is most likely to develop into the Drosophilia's head? (Activity 21D)

question 14

A
B
C
D
E


15.

The bicoid gene is transcribed by _____. (Activity 21D)

a sperm cell
the zygote
the acrosome
nurse cells
embryonic cells



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