Lakshya Education MCQs

Question: The average duration of menstrual cycle in human female is ___ days.
Options:
A.14
B.28
C.30
D.31
Answer: Option B
: B

The menstrual cycle lasts for about 28 days in female human beings. The release of ovum is called ovulation and it takes place during the mid period of this cycle. The first mentrual cycle in the lifespan of a female is called menarche and the last menstrual cycle is called menopause.

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Question 1. The process of doubling and duplicating the genetic material in the human cells is known as ________ and ________ type of cell division reduces chromosome number to half in sex cells.
  1.    DNA duplication, meiotic
  2.    DNA amplification, mitotic
  3.    DNA multiplication,cytokinesis
  4.    DNA replication, meiotic
Answer: Option D
: D

The process of doubling and replicating the genetic material in the human cells is known as DNA replication and meiotic cell division reduces chromosome number to half in sex cells. DNA replication is essential for cell division to take place.
Question 2. Which of the following is FALSE about ovum?
  1.    It is non-motile.
  2.    It is larger than the sperm.
  3.    It is produced in the scrotum.
  4.    It is the female gamete.
Answer: Option C
: C

Ovum or ova is the female gamete produced by the ovaries. It is a non-motile structure larger than a sperm. It is a single, haploid cell with several protective layers outside its cell membrane.
Question 3. In human beings, males attain puberty a little later than females.
  1.    True
  2.    False
  3.    Vas deferens
  4.    Fallopian tube
Answer: Option A
: A

In human beings, males attain puberty a little later than females. In girls, puberty usually begins at 10-11 years and completes at 15-16 yrs. In boys, puberty begins at 11-12 years and completes around 16-17 years.
Question 4. The gestation period in human is about:
  1.    100-120 days
  2.    320-360 days
  3.    270-280 days
  4.    500-520 days
Answer: Option C
: C

The gestation period is the period of foetal development starting from fertilisation and ending at parturition or childbirth. During this period, the single-celled zygoteundergoes gradual changes that help it to become afunctional multicellular organism. The gestation period in human beings is about 270-280 days (9 months).
Question 5. Label the parts of the flower:

  1.    1 - Peduncle, 2 - Filament, 3 - Petal, 4 - Stigma, 5 - Style, 6 -Ovary, 7 - Anther , 8 - Sepal
  2.    1 - Receptacle, 2 - Petal, 3 - Sepal, 4 - Style, 5 - Stigma, 6 - Ovule, 7 - Pollen sac, 8 - Filament 
  3.    1 - Peduncle, 2 - Sepal, 3 - Petal, 4 - Stigma, 5 - Style, 6 - Ovary, 7 - Anther, 8 - Stamen
  4.    1 - Receptacle, 2 - Sepal, 3 - Petal, 4 - Stigma, 5 - Style, 6 - Ovary, 7 - Stamen, 8 - Filament
Answer: Option C
: C

Question 6. Which of the following is not a part of female reproductive system in human beings?
  1.    Ovary
  2.    Uterus
  3.    Vas deferens
  4.    Fallopian tube
Answer: Option C
: C

Vas deferens is a part of the male reproductive system. It is a duct that carries sperms from epididymis to copulatory organ. Along the way, secretions from seminal vesicles and prostate glands are added to the sperms. Ovary, uterus, fallopian tubes are parts of the female reproductive system.

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