BMB 252 EXAM 1 QUESTIONS AND ANSWERS
What differs the most in between species?
a) the regulatory regions of genes
b) number of proteins - CORRECT ANSWER✅✅✅a
Which of the following refers to the homologous proteins?
a) they are always from the same organism
b) they have similar structure and similar ancestry - CORRECT ANSWER✅✅✅b
The hollow ball of cells that form during development is called _____.
a) blastula
b) gastrula - CORRECT ANSWER✅✅✅a
Which embryonic layer do lungs come from?
a) ectoderm
b) endoderm
c) mesoderm - CORRECT ANSWER✅✅✅b
Which embryonic layer does the nervous system develop from?
a) ectoderm
b) endoderm
c) mesoderm - CORRECT ANSWER✅✅✅a
(T/F) Blastomeres can each develop into an organism - CORRECT ANSWER✅✅✅true
Morphogenesis is ___.
a) differentiation
b) specialization
,c) formation of shape - CORRECT ANSWER✅✅✅c
In which organism sperm entry point defines the ventral side?
a) xenopus
b) drosophila - CORRECT ANSWER✅✅✅a
What defines the posterior end in Drosophila?
a) nanos
b) bicoid
c) torso receptors
d) toll receptors - CORRECT ANSWER✅✅✅a
What synthesizes Nanos and bicoid mRNA?
a) nurse cells
b) follicle cells
c) zygote - CORRECT ANSWER✅✅✅a
(T/F) If Nanos is mutated in the paternal genome, the organism will not have the posterior end. -
CORRECT ANSWER✅✅✅false
(T/F) Morphogen can be part of a contact-dependent signaling. - CORRECT ANSWER✅✅✅false
(T/F) Inductive signaling can be contact dependent. - CORRECT ANSWER✅✅✅true
What stage of M-phase does not occur in syncytium?
a) mitosis
b) cytokinesis - CORRECT ANSWER✅✅✅b
How many clusters of Hox genes are there in humans?
, a) 1
b) 2
c) 4 - CORRECT ANSWER✅✅✅c
Where do homeodomain proteins vary the most?
a) in DNA binding domain
b) in interaction domain - CORRECT ANSWER✅✅✅b
Protein dorsal promotes the development of ____.
a) dorsal part
b) ventral - CORRECT ANSWER✅✅✅b
Low affinity binding sites can only be occupied at ___.
a) high concentration of dorsal
b) low concentration of dorsal - CORRECT ANSWER✅✅✅a
Twist promotes invagination of ____.
a) ectoderm
b) endoderm
c) mesoderm - CORRECT ANSWER✅✅✅c
Unlike vertebrate, insects have CNS at the _____.
a) ventral side
b) dorsal side - CORRECT ANSWER✅✅✅a
Dorsal lip organizer cells develop into ____.
a) notochord
b) spinal cord - CORRECT ANSWER✅✅✅a
What differs the most in between species?
a) the regulatory regions of genes
b) number of proteins - CORRECT ANSWER✅✅✅a
Which of the following refers to the homologous proteins?
a) they are always from the same organism
b) they have similar structure and similar ancestry - CORRECT ANSWER✅✅✅b
The hollow ball of cells that form during development is called _____.
a) blastula
b) gastrula - CORRECT ANSWER✅✅✅a
Which embryonic layer do lungs come from?
a) ectoderm
b) endoderm
c) mesoderm - CORRECT ANSWER✅✅✅b
Which embryonic layer does the nervous system develop from?
a) ectoderm
b) endoderm
c) mesoderm - CORRECT ANSWER✅✅✅a
(T/F) Blastomeres can each develop into an organism - CORRECT ANSWER✅✅✅true
Morphogenesis is ___.
a) differentiation
b) specialization
,c) formation of shape - CORRECT ANSWER✅✅✅c
In which organism sperm entry point defines the ventral side?
a) xenopus
b) drosophila - CORRECT ANSWER✅✅✅a
What defines the posterior end in Drosophila?
a) nanos
b) bicoid
c) torso receptors
d) toll receptors - CORRECT ANSWER✅✅✅a
What synthesizes Nanos and bicoid mRNA?
a) nurse cells
b) follicle cells
c) zygote - CORRECT ANSWER✅✅✅a
(T/F) If Nanos is mutated in the paternal genome, the organism will not have the posterior end. -
CORRECT ANSWER✅✅✅false
(T/F) Morphogen can be part of a contact-dependent signaling. - CORRECT ANSWER✅✅✅false
(T/F) Inductive signaling can be contact dependent. - CORRECT ANSWER✅✅✅true
What stage of M-phase does not occur in syncytium?
a) mitosis
b) cytokinesis - CORRECT ANSWER✅✅✅b
How many clusters of Hox genes are there in humans?
, a) 1
b) 2
c) 4 - CORRECT ANSWER✅✅✅c
Where do homeodomain proteins vary the most?
a) in DNA binding domain
b) in interaction domain - CORRECT ANSWER✅✅✅b
Protein dorsal promotes the development of ____.
a) dorsal part
b) ventral - CORRECT ANSWER✅✅✅b
Low affinity binding sites can only be occupied at ___.
a) high concentration of dorsal
b) low concentration of dorsal - CORRECT ANSWER✅✅✅a
Twist promotes invagination of ____.
a) ectoderm
b) endoderm
c) mesoderm - CORRECT ANSWER✅✅✅c
Unlike vertebrate, insects have CNS at the _____.
a) ventral side
b) dorsal side - CORRECT ANSWER✅✅✅a
Dorsal lip organizer cells develop into ____.
a) notochord
b) spinal cord - CORRECT ANSWER✅✅✅a
