Absence of acrosome will affect which activity in a normal sperm?

1. Maturation of sperm

2. Energy utilization for movement

3. Sperm motility

4. Penetration into the ovum

Subtopic:  Fertilization: Part 1 | Fertilization |
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What happens during fertilisation in humans after many sperms reach close to the ovum?

1. Only two sperms nearest the ovum penetrate zona pellucida
2. Secretions of acrosome help one sperm enter the cytoplasm of the ovum through zona pellucida
3. All sperms except the one nearest to the ovum lose their tails
4. Cells of corona radiata trap all the sperms except one
Subtopic:  Fertilization |
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From NCERT
AIPMT - 2011
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Sperm has several components out of which the function of the acrosome is to:

1. Produce base to neutralize the acidic environment of the female reproductive system
2. Propel the sperm as they swim through the fluid of the female reproductive tract
3. Release an enzyme that breaks down the membrane of the ovum
4. Metabolise the sugars provided by the semen for energy
Subtopic:  Fertilization: Part 2 | Fertilization |
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From NCERT
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Fertilisation in humans is practically feasible only if

1. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the fallopian tube
2. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix
3. the sperms are transported into cervix within 48 hrs of release of ovum in uterus
4. the sperms are transported into vagina just after the release of ovum in fallopian tube

Subtopic:  Fertilization: Part 1 | Fertilization: Part 2 | Fertilization |
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From NCERT
NEET - 2016
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In human females, meiosis-II is not completed until 

1. Puberty

2. fertilization 

3. Uterine implantation 

4. birth 

Subtopic:  Fertilization: Part 1 | Fertilization: Part 2 | Fertilization |
 83%
From NCERT
NEET - 2015
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Choose the incorrect match

(1) Morula –                  8 to 16 blastomeres

(2) Blastocyst –             Implantation in
                                     Endometrium

(3) Second polar body – Completion of 1st
                                     meiotic division

(4) Foetal ejection reflex – Cortisol, estrogen,
                                      oxytocin

Subtopic:  Fertilization |
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One of the following is haploid cell
1. Primordial germ cell
2. Oogonium
3. Primary oocyte
4. Secondary oocyte

Subtopic:  Fertilization: Part 1 | Fertilization: Part 2 | Fertilization |
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Consider the following two statements:
I. Not all copulations lead to fertilization and pregnancy
II. Fertilization can occur if the ovum and the sperms are simultaneously transported to the fallopian tubes.
1. Both I and II are correct and II correctly explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct

Subtopic:  Fertilization: Part 2 | Fertilization |
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From NCERT
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What is the order of layers or space from outside to inside?

(1) Zona pellucida-Perivitelline space- plasma membrane

(2) Perivitelline space- Plasma Membrane- Zona Pellucida

(3) Plasma Membrane- Perivitelline space-Zona Pellucida

(4) Perovitelline space- zona pellucida-ovum cytoplasm

Subtopic:  Fertilization: Part 1 | Fertilization: Part 2 | Fertilization |
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At the end of the second meiotic division, the human female germ cells differentiate to form

1. Oogonia

2. First polar body

3. Second polar body

4. Primary oocyte

Subtopic:  Fertilization |
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From NCERT
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