Tag: cell division in embryo development

Questions Related to cell division in embryo development

How many chromosomes will the cell have at GI, after S and after M-phase respectively if it has 14 chromosomes at interphase

biology division for growth and reproduction cell division in embryo development structure of chromosome, cell cycle and cell division component of the cell different types of reproduction reproductive health of humans need of family planning tissues of animals mitosis reproductive health

  1. 7, 14, 14

  2. 14, 14, 14

  3. 14, 14, 7

  4. 7, 7, 7

Show answer
Correct Option: B
Explanation:

At G1 phase, there will be 14 chromosomes as no DNA replication has taken place. After S Phase, the DNA content doubles but chromosome number still remains same here 14. After completion of M phase, the number of chromosomes will be 28 with each daughter cell having same number of chromosomes as that of parent i.e 14

Therefore B is the correct option. 

Match the lists and choose the correct option:

a. $G _1$ phase i. Replication of DNA
b. S-phase ii. Quiescent stage
c. $G _2$-phase iii. Condensation chromatin
d. $G _0$-phase iv. Protein synthesis
v. Interval between mitosis and initiate of DNA replication
biology division for growth and reproduction cell division in embryo development structure of chromosome, cell cycle and cell division component of the cell different types of reproduction reproductive health of humans need of family planning tissues of animals mitosis reproductive health

  1. a-iii, b-ii, c-i, d-ii

  2. a-v, b-iv, c-i, d-iii

  3. a - v, b -i, c - iv, d-ii

  4. a v, b -ii, c-iii, d - iv

Show answer
Correct Option: C
Explanation:
Interphase generally lasts at least 12 to 24 hours in mammalian tissue. During this period, the cell is constantly synthesizing RNA, producing protein and growing in size. Interphase can be divided into 4 steps: Gap 0 (G0), Gap 1 (G1), S (synthesis) phase, Gap 2 (G2).
Gap 0 (G0): There are times when a cell will leave the cycle and quit dividing
Gap 1 (G1): Cells increase in size in Gap 1, produce RNA and synthesize protein.
S Phase: To produce two similar daughter cells, DNA replication occurs during this S (synthesis) phase.
Gap 2 (G2): During the gap between DNA synthesis and mitosis, the cell will continue to grow and produce new proteins.
Hence answer is 'a - v, b -i, c - iv, d-ii'

Which stage of cell cycle occurs immediately prior to mitosis 

biology cell division cell division in embryo development division for growth and reproduction structure of chromosome, cell cycle and cell division mitosis

  1. $M$

  2. $G _1$

  3. $S$

  4. $G _2$

Show answer
Correct Option: D
Explanation:

$G _2$ phase is the phase of cell cycle occurs immediately prior to mitosis.
sequence of cell cycle is -- $G _1$ to $S$ to $G _2$ to $M$ to cytokinesis.

So, the correct answer is '$G _2$

Euthanasia (mercy killing) was first legalized in

reproduction - the generating system reproductive health of humans need of family planning reproductive health problems cell division in embryo development division for growth and reproduction reproductive health

  1. Switzerland

  2. Netherland

  3. France

  4. Italy

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Correct Option: B
Explanation:

Euthanasia is the practice of intentionally ending a life in order to relieve pain and suffering. The Netherland's parliament passed a bill legalizing euthanasia on February 20th, 2008 becoming the first country to do so.
Therefore, the correct answer is option B.

Which of the following act forbids the practice of child marriages in India?

reproduction - the generating system reproductive health of humans need of family planning reproductive health problems cell division in embryo development division for growth and reproduction reproductive health

  1. Sandhya Act

  2. Sonia Act

  3. Sharda Act

  4. Mother Teresa Act

Show answer
Correct Option: C
Explanation:

Child Marriage Restraint Act 1929 popularly known as the Sarda Act after its sponsor Rai Sahib Harbilas Sarda to the British India Legislature in India was passed on 28 September 1929, fixed the age of marriage for girls at 14 years and boys at 18 years which was later amended to 18 for girls and 21 for boys. It came into effect six months later on April 1, 1930 and it applies to all of British India, not just to Hindus. It was a result of social reform movement in India. The legislation was passed by the British Indian Government.

Having sex with a minor is called _______

reproduction - the generating system reproductive health of humans need of family planning reproductive health problems cell division in embryo development division for growth and reproduction reproductive health

  1. Sodomy

  2. Statutory rape

  3. Public Indecency

  4. Legal

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Correct Option: B
Explanation:

A sodomy law is a law that defines certain sexual acts as crimes, Sexual intercourse by an adult with a person below a statutorily designated age is statutory rape. Public Indecency is the deliberate exposure of ones body in public considered as inappropriate behaviour.

Sexual abuse can be prevented by

reproduction - the generating system reproductive health of humans need of family planning reproductive health problems cell division in embryo development division for growth and reproduction reproductive health

  1. Sex education

  2. Organizing self-protection program

  3. Isolating girls from external environment

  4. Both A and B

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Correct Option: D

Hina who studied in class 10th was suffering from depression. She does not eat properly, does not talk with anyone in school and also does not finish her homework daily. She may be

reproduction - the generating system reproductive health of humans need of family planning reproductive health problems cell division in embryo development division for growth and reproduction reproductive health

  1. Sexually abused

  2. Mentally ill

  3. Lazy

  4. Both A and B

Show answer
Correct Option: D

The best way to reduce sexual abuse is

reproduction - the generating system reproductive health of humans need of family planning reproductive health problems cell division in embryo development division for growth and reproduction reproductive health

  1. Imprisonment of the criminal

  2. Penalty

  3. Sex education

  4. All of the above

Show answer
Correct Option: D

The effect of sexual abuse is

reproduction - the generating system reproductive health of humans need of family planning reproductive health problems cell division in embryo development division for growth and reproduction reproductive health

  1. Sexually transmitted diseases

  2. Suicide

  3. Depression

  4. All of the above

Show answer
Correct Option: D
Explanation:

Sexual abuse is the act in which the person is forced to participate in any type of sexual activity. The person may suffer from sexually transmitted disease which has been acquired during the abuse. These people are at higher risk to perform suicides due to trauma and suffering. There are changes in the behaviour which depict that the person has been sexually abused. The person would show disinterest in any activities and may suffer from depression and sadness.

Thus, the correct answer is option D.