ZOO501T Final Term Objective 2023 by Sulman Ali

OBJCTIVES OF CURRENT PAPER · ZOO501- DEVELOPMENT BIOLOGY · Final-Term File 2023 By · SULMAN ALI (BS-ZOOLOGY)

1. A condition in which cell lacks instructions for development is Naïve.
2. The size of Dna in nucleosome is almost? 140 bp
3. How many responses and egg delivered to sperm during fusion process? 2

Q4. which of the following progress through a cell cycle consisting of just two steps?

Blastomeres

5. The ability of the embryonic cells to change their fates to compensate for the missing is called regulation
6. when potassium ions leave the sperm then it’s membrane potential become? Negative
7. A membrane that surrounds bones is called periosteum.
8. The major cells adhesion molecules appear to the cadherians.
9. which type of neurulation is common in fishes ? Secondary neurulation
10. In rana pipiens egg development last 3 years
11. major classes of cadhrin includes N cadherians.
12. florescent dyes such as fura 2 is used to visualized which of the following? Calcium
13. axoneme is formed by microtubules..
14. Most Transcription factors can bind to specific DNA
15. fusion of egg And sperm cell plasma membrane.
16. Egg plasma membrane changed the potential by changing the concentration sodium.

Q17. calcium and bicarbonate ions may be critical in activating cAMP?

18. This resting membrane potential is generally about 70mV
19. Zp3 is the specific glycoprotein in the mouth.
20. The acrosomal reaction in sea urchins Is initiated by contact of the sperm and with the jelly.
21. Finally ,a fourth cortical granule protein hyaline forms a coating around the egg.
22. strateging for establishment commitment are 2
23. the mature sea urchin egg is a metabolically sugglish cell that is activated by the sperm.
24. during the process of development division of embryo leads to how many layers? Three
25. the opening of archerteron at the vegetal region is called blastopore.
26. fusion of the genetic material of sperm and egg is called fertilization.
27. the orientation of cleavage plane is snail eggs controlled by cytoplasmic factors.
28. the blastomere cell cycle is governed by the synthesis degration of cycle
29. in tunicate cleavage at the 32 stage cell a small blastocoel.
30. The fetal portion of placenta formed by ______ Chorion
31. The peripheral ring of blastoderm cells that have not shed their deep cells constitutes the area Opaca.
32. the rudiment of the central nervous system, is called Neurulation.
33. Archenteron is used for Primitive Gut
34. Spiral holoblastic cleavage is characteristic of several animal groups including annelid,worms, some flatworm.
35. In sea urchins, cell fates are determined by signaling.
36. The ype of cell forms the syncytiotrophoblas
37. The cells at the dorsalmost portion of the neural Tube become the neural crest cells.
38. The Myelencephalon eventually becomes the Medulla oblongata
39. One agent .the human posterior neural tube regions at day 27. (close)
40. Failure to close the anterior neural tube regions results in a lethal condition anencephaly
41. original ependymal layer of the cerebellum generates a wide variety of neurons and glial cells, including the distinctive and large Purkinje neurons.
42. TGF-β Family secreted from the surface ectoderm and roof of the neural tube.
43. Paracrine factors instruct the ……cells to become muscles. (myotome
44. The osteoblasts secrete a colondral ossification involves the formation of cartilage tissue
45. Neuive groove depression
46. Vegetal pole :Dalton protein , 30500 Da

47. Primary neurolation

48. Identical twins….0.25%
49. Acadians have notochord but lack vertebrae
50. Neural crest formee from.. portion most dorsal Area opeca
51. Sub germinal cavity Mantle zone have neurons ..gilia
52. Cluster of neurons….nuclei
53. poblast……cell determine inner cell Mass
54. Contracting long thin (30×5 um) …..filopodia
55. Perechordal plate induc…forebrain
56. Fertile portion is chorion
57. Tgf and fgf7 …in skin development
58. Teleo lecithal egg include birds fish
59. Sox9 gene….encode DNA
60. Direct conversion of mesenchymal tussu into bones ……. Intramembrane ossification
61. In see urchins fate determine by …..signaling
62. To ……… anterior neural tube region anencephaly .close
63. Mesencephalon become. Medulla oblongata
64. Spiral holoblastic cleveage in…….. worms flatworms molluscs annelids
65. Which of the following insect follow all three modes of specification--- Drosophila
66. Silencers are molecules which are basically ---- negative enhancers
67. The sperm travel by the amoeboid motion of ------- of the cell membrane.

_____Lamellipodial Extensions

68. The mechanical agent of cytokinesis is a contractile ring of microfilaments made of actin
69. These cells begin extending and contracting long, thin (30 × 5 μm) processes called filopodia from their inner surfaces.
70. In the typical cleavage of molluscs, cells divides to produce most of the larval structures
71. They have a notochord as larvae (and therefore are chordates), but they lack vertebrae.
72. The presumptive notochord cells on the right and left sides of the embryo migrate to the midline and interdigitate to form the notochord, a single row of 40 cells
73. Cyclin synthesis promotes the formation of MPF, and MPF promotes mitosis.
74. The first 12 divisions occur synchronously, forming a mound of cells that sits at the animal pole of a large yolk cell.
75. Fertilization of the chick egg occurs in the oviduct, before the albumen and the shell are secreted upon it.
76. The major structural characteristic of avian, reptilian, and mammalian gastrulation is the primitive streak.
77. This fetal organ the Chorion is derived primarily from embryonic trophoblast cells.
78. The original type of trophoblast cells constitute a layer called the cytotrophoblast.
79. The prechordal plate induces the formation of the forebrain.
80. In birds pH differences appear crucial for distinguishing dorsal from ventral.
81. The rudiment of the central nervous system, is called neurulation
82. The cells at the dorsalmost portion of the neural tube become the neural crest cells.
83. The most crucial, difference between mammalian cleavage and all other types involves the phenomenon of___________ Compaction
84. Between the area pellucida and the area opaca is a thin layer of cells called the _______Marginal Zone (Or Marginal Belt).
85. The telencephalon will eventually form the cerebral hemispheres, and the diencephalon will form the thalamic and -------brain regions_____ Hypothalamic
86. TGF-β family secreted from the surface ----- and roof of the neural tube. ____ Ectoderm
87. -----is characteristic of several animal groups including annelid, worms, some flatworms, and most mollusks_____ Spiral holoblastic cleavage
88. In sea urchins, cell fates are determined by_____ Signaling
89. The ......... constitute a major signaling center_____ micromeres
90. Shell formation___ snails
91. Multinucleated type of cell forms the_____ syncytiotrophoblast
92. The cells at the dorsal most portion of the neural tube become____ neural crest cells.
93. The Myelencephalon eventually becomes the____ Medulla oblongata
94. One agent of ventral specification is the____ sonic hedgehog.
95. Chlamydomona usually haploid having---- Copies of chromosomes___ Only one
96. Pdx1 is specific for------ region of endoderm____ pancreatic
97. Protein synthesis is accomplished by ribosomes and______ tRNA
98. Sea urchins exhibit which cleavage____ radial holoblastic
99. Mouse fertilin is localized to the posterior plasma membrane of the sperm____ head Mesoderm forms____ Kidneys MPF have how many units_____ 2 The major cell adhesion------ appear to be the Cadherins____ Molecules