BMB 252 Last Exam – Study Guide, Practice Questions & Revision Notes
What differs the most in between species?
a) the regulatory regions of genes
b) number of proteins - ✔✔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 - ✔✔b
The hollow ball of cells that form during development is called _____.
a) blastula
b) gastrula - ✔✔a
Which embryonic layer do lungs come from?
a) ectoderm
b) endoderm
c) mesoderm - ✔✔b
Which embryonic layer does the nervous system develop from?
a) ectoderm
b) endoderm
c) mesoderm - ✔✔a
(T/F) Blastomeres can each develop into an organism - ✔✔true
,Morphogenesis is ___.
a) differentiation
b) specialization
c) formation of shape - ✔✔c
In which organism sperm entry point defines the ventral side?
a) xenopus
b) drosophila - ✔✔a
What defines the posterior end in Drosophila?
a) nanos
b) bicoid
c) torso receptors
d) toll receptors - ✔✔a
What synthesizes Nanos and bicoid mRNA?
a) nurse cells
b) follicle cells
c) zygote - ✔✔a
(T/F) If Nanos is mutated in the paternal genome, the organism will not have the posterior end. -
✔✔false
(T/F) Morphogen can be part of a contact-dependent signaling. - ✔✔false
(T/F) Inductive signaling can be contact dependent. - ✔✔true
, What stage of M-phase does not occur in syncytium?
a) mitosis
b) cytokinesis - ✔✔b
How many clusters of Hox genes are there in humans?
a) 1
b) 2
c) 4 - ✔✔c
Where do homeodomain proteins vary the most?
a) in DNA binding domain
b) in interaction domain - ✔✔b
Protein dorsal promotes the development of ____.
a) dorsal part
b) ventral - ✔✔b
Low affinity binding sites can only be occupied at ___.
a) high concentration of dorsal
b) low concentration of dorsal - ✔✔a
Twist promotes invagination of ____.
a) ectoderm
b) endoderm
c) mesoderm - ✔✔c
What differs the most in between species?
a) the regulatory regions of genes
b) number of proteins - ✔✔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 - ✔✔b
The hollow ball of cells that form during development is called _____.
a) blastula
b) gastrula - ✔✔a
Which embryonic layer do lungs come from?
a) ectoderm
b) endoderm
c) mesoderm - ✔✔b
Which embryonic layer does the nervous system develop from?
a) ectoderm
b) endoderm
c) mesoderm - ✔✔a
(T/F) Blastomeres can each develop into an organism - ✔✔true
,Morphogenesis is ___.
a) differentiation
b) specialization
c) formation of shape - ✔✔c
In which organism sperm entry point defines the ventral side?
a) xenopus
b) drosophila - ✔✔a
What defines the posterior end in Drosophila?
a) nanos
b) bicoid
c) torso receptors
d) toll receptors - ✔✔a
What synthesizes Nanos and bicoid mRNA?
a) nurse cells
b) follicle cells
c) zygote - ✔✔a
(T/F) If Nanos is mutated in the paternal genome, the organism will not have the posterior end. -
✔✔false
(T/F) Morphogen can be part of a contact-dependent signaling. - ✔✔false
(T/F) Inductive signaling can be contact dependent. - ✔✔true
, What stage of M-phase does not occur in syncytium?
a) mitosis
b) cytokinesis - ✔✔b
How many clusters of Hox genes are there in humans?
a) 1
b) 2
c) 4 - ✔✔c
Where do homeodomain proteins vary the most?
a) in DNA binding domain
b) in interaction domain - ✔✔b
Protein dorsal promotes the development of ____.
a) dorsal part
b) ventral - ✔✔b
Low affinity binding sites can only be occupied at ___.
a) high concentration of dorsal
b) low concentration of dorsal - ✔✔a
Twist promotes invagination of ____.
a) ectoderm
b) endoderm
c) mesoderm - ✔✔c
