Sperm Anatomy

Q. Acrosome reaction in sperm is triggered by

1. Release of lysine
2. Capacitation
3. Influx of $N{a}^{+}$
4. Release of fertilizin

Q.

In the given figure, identify the labelled parts and match them with their relative description.

1. P - ii Q - iii R - v S - i

2. P - v Q - i R - iii S - ii

3. P - iv Q - iii R - ii S - i

4. P - ii Q - v R - iv S - i

Q.

Acrosome of the sperm is derived from_______

1. Golgi apparatus

2. nucleus

3. centriole

4. mitochondria

Q.

Choose the correct option with respect to the assertion and reason given.

Assertion [A]: Sperms are stripped of other organelles except for mitochondria.

Reason [R]: Sperm motility is important for fertility in humans.

1. [A] is true and [R] is false.

2. [A] is false and [R] is true.

3. Both [A] and [R] are true and [R] is a correct explanation to [A].

4. Both [A] and [R] are true but [R] is not a correct explanation to [A].

Q. Which organelle is absent in human sperm?

1. Nucleus
2. Centriole
3. E.R.
4. Mitochondria

Q.

The cell organelle(s) present in a mature sperm is/are

1. Acrosome

2. Mitochondria

3. Centriole

4. Nucleus

5. All of the above

Q.

Given below are certain statements regarding sperm organelles. With respect to these statements, choose the correct option.

Statement 1: Centrioles provide polarity to the sperm.

Statement 2: Centrioles release energy when mitochondria in sperm become dysfunctional.

Statement 3: Centrioles help in cell division in the zygote formed post fertilisation.

Statement 4: Sperm do not possess centrioles.

1. Statement 1, 3 and 4 are correct.

2. Statement 1 is correct.

3. Statement 1 and 2 are correct.

4. Statement 3 is correct.

Q. Which one of the following statements about human sperm is correct?

1. Acrosome has a conical point structure used for piercing and penetrating the egg resulting in fertilisation
2. The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation
3. Acrosome serves no particular function
4. Acrosome serves as a sensory structure leading the sperm towards the ovum

Q.

The spermatozoan has

1. Head

2. Tail

3. All of the above

4. Mid-piece

Q. A cross section at the midpoint of the middle piece of human sperm will show

1. centriole, mitochondria and 9 + 2 arrangement of microtubules
2. centriole and mitochondria
3. mitochondria and 9 + 2 arrangement of microtubules
4. 9 + 2 arrangement of microtubules only