BMB 252 EXAM 4 QUESTIONS AND ANSWERS
What differs the most in between species?
The regulatory regions of genes
Number of proteins - CORRECT ANSWER✅✅✅The regulatory regions of genes
Which of the following refers to the homologous proteins?
They are always from the same organism
They have similar structure and similar ancestry - CORRECT ANSWER✅✅✅They have similar
structure and similar ancestry
The hollow ball of cells that form during development is called______
blastula
gastrula - CORRECT ANSWER✅✅✅blastula
Which embryonic layer do lungs come from?
ectoderm
endoderm
mesoderm - CORRECT ANSWER✅✅✅endoderm
Which embryonic layer does the nervous system develop from?
ectoderm
endoderm
mesoderm - CORRECT ANSWER✅✅✅ectoderm
Blastomeres can each develop into an organism.
True
False - CORRECT ANSWER✅✅✅True
,Morphogenesis is_______
Differentiation
Specialization
Formation of the shape - CORRECT ANSWER✅✅✅Formation of the shape
In which organism sperm entry point defines the ventral side?
Xenopus
Drosophila - CORRECT ANSWER✅✅✅Xenopus
What defines the posterior end in Drosophila?
Nanos
Bicoid
Torso receptors
Toll receptors - CORRECT ANSWER✅✅✅Nanos
What synthesizes Nanos and Bicoid mRNA?
Nurse cells
Follicle cells
Zygote - CORRECT ANSWER✅✅✅Nurse cells
If Nanos is mutated in the paternal genome, the organism will not have the posterior end.
True
False - CORRECT ANSWER✅✅✅False
Morphogen can be part of a contact-dependent signaling.
True
False - CORRECT ANSWER✅✅✅False
, Inductive signaling can be contact dependent.
True
False - CORRECT ANSWER✅✅✅True
What stage of M-phase does not occur in syncytium?
mitosis
cytokinesis - CORRECT ANSWER✅✅✅cytokinesis
How many clusters of Hox genes are there in human?
1
2
4 - CORRECT ANSWER✅✅✅4
Where do homeodomain proteins vary the most?
In DNA binding domain
In interaction domain - CORRECT ANSWER✅✅✅In interaction domain
Protein dorsal promotes the development of _______
Dorsal part
Ventral part - CORRECT ANSWER✅✅✅Ventral part
Low affinity binding sites can only be occupied at ______
High concentration of Dorsal
Low concentration of Dorsal - CORRECT ANSWER✅✅✅High concentration of Dorsal
Twist promotes invagination of_______
Ectoderm
Endoderm
What differs the most in between species?
The regulatory regions of genes
Number of proteins - CORRECT ANSWER✅✅✅The regulatory regions of genes
Which of the following refers to the homologous proteins?
They are always from the same organism
They have similar structure and similar ancestry - CORRECT ANSWER✅✅✅They have similar
structure and similar ancestry
The hollow ball of cells that form during development is called______
blastula
gastrula - CORRECT ANSWER✅✅✅blastula
Which embryonic layer do lungs come from?
ectoderm
endoderm
mesoderm - CORRECT ANSWER✅✅✅endoderm
Which embryonic layer does the nervous system develop from?
ectoderm
endoderm
mesoderm - CORRECT ANSWER✅✅✅ectoderm
Blastomeres can each develop into an organism.
True
False - CORRECT ANSWER✅✅✅True
,Morphogenesis is_______
Differentiation
Specialization
Formation of the shape - CORRECT ANSWER✅✅✅Formation of the shape
In which organism sperm entry point defines the ventral side?
Xenopus
Drosophila - CORRECT ANSWER✅✅✅Xenopus
What defines the posterior end in Drosophila?
Nanos
Bicoid
Torso receptors
Toll receptors - CORRECT ANSWER✅✅✅Nanos
What synthesizes Nanos and Bicoid mRNA?
Nurse cells
Follicle cells
Zygote - CORRECT ANSWER✅✅✅Nurse cells
If Nanos is mutated in the paternal genome, the organism will not have the posterior end.
True
False - CORRECT ANSWER✅✅✅False
Morphogen can be part of a contact-dependent signaling.
True
False - CORRECT ANSWER✅✅✅False
, Inductive signaling can be contact dependent.
True
False - CORRECT ANSWER✅✅✅True
What stage of M-phase does not occur in syncytium?
mitosis
cytokinesis - CORRECT ANSWER✅✅✅cytokinesis
How many clusters of Hox genes are there in human?
1
2
4 - CORRECT ANSWER✅✅✅4
Where do homeodomain proteins vary the most?
In DNA binding domain
In interaction domain - CORRECT ANSWER✅✅✅In interaction domain
Protein dorsal promotes the development of _______
Dorsal part
Ventral part - CORRECT ANSWER✅✅✅Ventral part
Low affinity binding sites can only be occupied at ______
High concentration of Dorsal
Low concentration of Dorsal - CORRECT ANSWER✅✅✅High concentration of Dorsal
Twist promotes invagination of_______
Ectoderm
Endoderm
