WorksheetsDev Bio Quiz 01
Total questions: 50
Worksheet time: 22mins
(a) is considered as the 'father of Comparative Embryology'.
What name is given to mature sperm?
Spermatocyte
Spermatozoa
Spermatogonium
Spermatogonia
Where do you find spermatogonia?
Attached to the germinal epitheliium of the seminiferous tubule
Attached to the Sertoli cells
Attached to Leydig cells
In the epididymis
What cells secrete testosterone?
Sertoli cells
Spermatocytes
Spermatids
Leydig cells
How many secondary spermatocytes are produced after the first round of meiosis?
1
2
4
Spermatogenesis occurs in the
A)epididymis
B)seminiferous tubules.
C)prostate gland
D)vas deferens
E)seminal vesicle.
During spermatogenesis, which of the following cells is the first to become haploid?
A)primary spermatocyte
B)secondary spermatocyte
C)sperm cells
D)spermatid
E)spermatogonium
A primary spermatocytes.....
A)divide by mitosis to produce two secondary spermatocytes
B)divide by meiosis to produce two secondary spermatocytes.
C)divides by meiosis to produce four spermatids
D)divides by meiosis to produce two spermatids.
E)divides by mitosis to produce two spermatids.
Which of the following is a correct sequence of cells in spermatogenesis?
spermatogonium -> secondary spermatocyte -> primary spermatocyte
primary spermatocyte -> spermatogonium -> secondary spermatocyte
spermatogonium -> primary spermatocyte -> secondary spermatocyte
none of the above
Each spermatid....
divides by meiosis to produce four sperm cells
divides by mitosis to produce four sperm cells
divides by meiosis to produce two sperm cells
differentiates into a sperm cell
When does completion of meiosis occur?
Stage 1
Stage 2
Fertilisation
Ovulation
If fertilization does not happen, in which stage of meiosis II does the secondary oocyte leaves the female body?
Telophase
Prophase
Metaphase
Anaphase
When does oogenesis begin?
at birth
before birth
at the onset of adulthood
at the onset of puberty
What do you call the process in which the ovary releases a mature egg cell?
menstruation
oogenesis
ovulation
fertilisation
Oogenesis is the process in the ovary that results in the
production of female gametes. Which statement about
oogenesis in humans is false?
Oogenesis begins before birth
The process of oogenesis is completed when the egg cell
is penetrated by sperm
Oogenesis continues throughout the life of individual
In oogenesis, unequal cytokinesis results in one single
large daughter cell, which goes on to form the egg
Tick on haploid cell in oogenesis.
secondary oocyte
primary oocyte
oogonia
oogonia
What are the products of oogenesis in correct order?
Oogonium →primary oocyte and first polar body → secondary oocyte and second polar body →ovum
Primary oocyte → oogonium and first polar body → secondary oocyte and second polar body →ovum
Oogonium → primary oocyte → secondary oocyte and first polar body →ovum and second polar body
Ovum →primary oocyte and first polar body → secondary oocyte and second polar body → oogonium
Oogenesis occur in
uterus
vagina
cervix
ovary
Which of the following statements is true about secondary oocytes.
may degenerate if no fertilization occur
dictyate stage
diploid cell
arrested at prophase I
In human, how many chromosomes are found in a primary oocytes .
23
46
69
92
Activation of digestive enzymes in this structure allow sperm to burrow through the corona radiata.
Acrosome
Flagella
Head
Midpiece
After the sperm has fused with the egg and entered, what events take place?
The pronuleus of the male and female fuse completing the process of fertilization
The pronuleus of the male and female separate completing the process of fertilization
Cilia pull zygote towards infundibulum
Cilia pull sperm towards infundibulum
Find the odd one out among:
Vitelline membrane, Zona Pellucida, Corona radiata, Jelly envelope
Vitelline membrane
Zona Pellucida
Corona radiata
Jelly envelope
Albumen in the chick egg is secreted by
the egg itself.
the Yolk present in the egg.
the egg shell.
the hen's oviduct.
What is not true about a telolecithal egg?
contains yolk in vegetal half of ooplasm.
amphibians have this type of egg.
yolk is present in minute amount.
yolk nourishes the growing embryo.
An egg without any shell and thus, not self-sufficient for the embryo s.t. the embryo has to depend on maternal body for development, can best be described as a __________________ egg.
alecithal
non-cledoic
indeterminate
Species-specific sperm attraction in Sea Urchin happens by
Rheotaxis
Chemotaxis
Thermotaxis
Geotaxis
What is not true about fertlization in Sea Urchin?
Resact from egg jelly binds to its receptor on the sperm thereby activating it
Bindin from egg jelly coat binds to its receptors on the sperm and provide motility to the sperm
hydrolytic enzymes lysins and Proteasomes digest a path through the jelly coat to the egg cell surface
The fertilization cone gradually engulfs the sperm.
During the fast block to polyspermy,
The cortical reaction occurs and the fertilization envelope is created
The cortical rotation occurs
The egg cell membrane is depolarized
The egg cell membrane is polarized
Why is the acrosome important to an individual sperm cell?
It propels the sperm cell forward
It is the nucleus of the cell
It provides nutrients for the cell
It digest the outer jelly coat of an egg cell
Spot the odd one out from the following structures with reference to the male reproductive system:
Rete testis
Epididymis
Vasa efferentia
Isthmus
What is the cortical reaction, and why is it important?
The cortical reaction is the fusion of the egg cortex with the egg plasma membrane, which allows the sperm to enter.
The cortical reaction is the entry of Ca2+ ions into the egg, which initiates development.
The cortical reaction is the exocytosis of the cortical granules during egg maturation, which contain the components of the zona pellucida
The cortical reaction is the release of the cortical granules after sperm entry, which converts the vitelline membrane into the fertilization membrane which blocks polyspermy.
After fertilization the zygote goes through a rapid period of cell divisions called __________.
organogenesis
cleavage
gastrulation
fertilization
The formation of the fertilization membrane and the slow block to polyspermy are dependent on the:
entrance of potassium ions into the egg
departure of sodium ions from the egg
entrance of calcium ions into the egg
departure of hydrogen ions from the egg
Which is the correct order of events between the release of gametes into the water and fertilization in sea urchins?
1)Egg’s jelly coat is digested.
2)Sperm head contacts the egg surface.
3)Soluble molecules from egg jelly coat attract sperm.
4)Fusion of sperm and egg plasma membranes occurs.
5)Hydrolytic enzymes are discharged from the acrosome.
6)The acrosomal process is formed.
7)Protein molecules on the acrosomal process bind receptor proteins in the egg plasma membrane.
8)The acrosomal process penetrates the egg jelly coat.
1, 2, 3, 4, 5, 6, 7, 8
1, 3, 2, 4, 8, 5, 6, 7
3, 2, 5, 1, 6, 8, 7, 4
3, 2, 5, 1, 6, 7, 4, 8
If an egg cell were treated with EDTA, a chemical that binds calcium and magnesium ions,
the acrosomal reaction would be blocked
the fusion of sperm and egg nuclei would brlocked
the fast block to polyspermy would not occur
the fertilization envelope would not form
Changes taking place in the sperm before fertilization
capacitaiton
Cytogenesis
blastulation
cleavage
16-celled stage of zygote
Blastula
Blastocyst
morula
gastrula
The chemical present on the ovum that results in agglutation reaction
antifertilizin
agglutination
fertilizin
acrosome
______________ contains nutrients to support the early development of fertilized egg.
polar body
cytoplasm
cortical granules
nucleus
________________ possesses helical mitochondria which provide the ATP (energy) for swimming (and other processes)
acrosome
zona pellucida
cortical granules
midpiece
Contains protein fibres and microtubules to strengthen and allow the tail to move respectively.
acrosome
zona pellucida
flagellum
midpiece
The couple Izumo-Juno CD9 are a type of __________ proteins.
fusogen
agglutinogen
precipitation
hydrolytic
what is not true about mammalian fertilization?
entry of sperm is tangential to the egg surface
sperm enters the oocyte while the oocyte nucleus is completing its metaphase II
a true diploid nucleus is seen for the first time not in the zygote, but at the 2-cell stage
the egg develops a fertilization cone to engulf the sperm
The pattern of embryonic cleavage peculiar to a species is determined by
amount of yolk in the egg cytoplasm
distribution of yolk in the egg cytoplasm
both a and b
none
A plane of cleavage that passes through the animal-vegetal axis of the egg but not through its centre is:
equatorial
vertical
horizontal
meridional
Cleavage occurs in the periplasm but cleavage furrows donot extend into the central yolk rich cytoplasm (endoplasm) - this stage is called ________________________________.
cellular blastoderm
syncytium
synergid
periplasmic stage
_______________________ show BILATERAL holoblastic cleavage.
amphibians
tunicates
molluscs
mammals
