[Biology Class Notes] on MCQs on Meiosis Pdf for EXAM

Meiosis is a mechanism in which a single cell divides twice to produce four cells that contain half of the original amount of genetic data. Those cells are our sex cells-male sperm, female eggs. 

One cell divides up twice during meiosis to create four daughter cells. These four daughter cells are only half as numerous as chromosomes of the parent cell-haploid.

Meiosis is divisible into nine stages. These are divided between the first division of the cell (meiosis I) and the second division thereof (meiosis II).

Solved MCQs on Meiosis

1. The RNA and protein synthesis occurs in______

1. M phase

2. S phase

3. G1 Phase

4. G2 phase

Answer: c

Explanation: The first phase of the cell cycle is phase G1. It is an integral part of the Interphase. RNA and protein synthesis occurs in Phase G1.

2. When does synapsis occur at Meiosis?

1. Zygotene

2. Leptotene

3. Diplotene

4. Pachytene

Answer: a

Explanation: Zygotene is the second stage of the Meiosis prophase. Bivalents are seen as shaping the synaptonemal complexes. Synapsis facilitates the exchange of genetic material between the chromosomes.

3. Spindle fibers are formed by___________

1. Spindles

2. Tubulin

3. Flagella

4. Humulin

Answer: b

Explanation: Spindle fibers are made up of microtubules. Microtubules are polymers of alpha- and beta-tubulin dimers. Tubulin is a Globular Protein  It helps in dividing cells.

4. Chromosomes break during?

1. Prophase

2. Anaphase

3. Metaphase

4. Telophase

Answer: b

Explanation: The 3rd stage of cell division is anaphase. During this point, chromosomes move away from each other towards opposite spindle poles.

5. Replication of centriole occurs in ______________

1. Interphase

2. Prophase

3. Metaphase

4. Anaphase

Answer: a

Explanation: Interphase is the longest phase of the cell cycle in which typical cells submit most of their lives. It is divided into the G1, S phase, and G2 phase. The S phase is characterized by biosynthetic activity such as duplication of DNA and centrioles.

 

6. Colchicine arrests which of the following stages of cell division?

1. Anaphase

2. Telophase

3. Interphase

4. Metaphase

Answer: d

Explanation: Colchicine is an alkaloid in its natural state. It is used to treat acute gout attacks. Colchicine arrests metaphase for the stage of the division of cells.

7. Cell Plate is laid during __________

1. Cytokinesis

2. Karyokinesis

3. Interphase

4. Metaphase

Answer: a

Explanation: Cytokinesis is a process of cell division that divides the cytoplasm of a parental cell into two daughter cells.

8. Polyploidy may be induced artificially by__________

1. Self-pollination

2. Linebreeding

3. Inbreeding

4. Colchicine

Answer: d

Explanation: Polyploidy’s condition where diploid cells normally get one or more extra sets of chromosomes. Colchicine can cause polyploidy, artificially.

9. There are chromosomes arranged along the equator ___________

1. Prophase

2. Metaphase

3. Anaphase

4. Telophase

Answer: b

Explanation: Metaphase is the 2nd level of cell division. During metaphase, the chromosome organizes itself in the middle of the cell.

10. Chiasmata formation takes place during __________

1. Prophase I

2. Metaphase I

3. Anaphase I

4. Telophase I

Answer: a

Explanation: The formation of chiasmata takes place during prophase I, and chromosomes are duplicated during this period. Chiasmata is a spot where paired chromosomes stay in contact during the first meiosis metaphase.

Test Your Knowledge

1. The word meiosis had been coined by?

1. Robertson

2. Blackmann

3. Flemming

4. Farmer and Moore

2. During meiosis, chromatids of individual chromosomes separate during ___?

1. Metaphase I

2. Anaphase I

3. Anaphase II

4. Metaphase II

3. Meiosis is of evolutionary significance as it produces  ___?

1. Gametes

2. generally similar daughter cells

3. recommendations

4. four daughter cells

4. In metaphase I, the centromeres undergo division.

1. do not divide

2. divide but do not separate

3. are not similar

4. undergo division

5. Call the step of prophase I when synaptonemal complex dissolves when chromatids are transparent and tetrads are considered bivalents?

1. Pachytene

2. Diakinesis

3. Diplotene

4. Zygotene

The above article provides solved MCQs on Meiosis. The explanations of the MCQs are also given. Students can refer to this article for practicing questions. It will help them to revise the concept of Meiosis.