Free Cell Structure and Function MCQs with Answers

• A. G1 stage
• B. G0 stage
• C. G2 stage
• D. S phase

Explanation: Meiosis, which is the process of cell division that produces gametes (sperm and eggs), does not have a G2 phase during interphase.

• A. Diplotane
• B. Zygotenre
• C. Leptotene
• D. Diakinesis

Explanation: During the diakinesis stage of meiosis, the condensation of chromosomes reaches its maximum level.

• A. XXY
• B. XXYY
• C. XYYY
• D. Xy

Explanation: In Klinefelter syndrome, individuals typically have an extra X chromosome, resulting in a genotype of XXY instead of the usual XY in…

• A. Haemophilia
• B. Klinefelter's syndrome
• C. Turner's syndrome
• D. Down's syndrome

Explanation: Turner syndrome is a genetic disorder that occurs in females due to complete or partial absence of one of the X chromosomes (typically XO…

• A. 3
• B. 5
• C. 2
• D. 4

Explanation: Meiosis involves two consecutive divisions: meiosis I and meiosis II. During meiosis I, homologous chromosomes pair up and exchange…

• A. 2
• B. 8
• C. 6
• D. 4

Explanation: At the end of meiosis, four daughter cells are produced. These daughter cells are haploid, meaning they contain half the number of…

• A. Viruses
• B. Both plants and animals
• C. Plants
• D. Bacteria

Explanation: Meiosis in plants and animals is a specialized type of cell division that occurs in reproductive cells (gametes) to produce offspring with…

• A. Cancer
• B. Benign
• C. Malign
• D. Interdigitate

Explanation: A benign tumor is a non-cancerous growth of cells that does not invade nearby tissues or spread to other parts of the body.

• A. Meiosis II
• B. Mitosis
• C. Both (A) and (B)
• D. Meiosis I

Explanation: Reduction in chromosome number occurs in meiosis I, specifically during the process of homologous chromosome pairing and segregation.

• A. Diplotene
• B. Zygotene
• C. Pachytene
• D. Leptotene

Explanation: Crossing over, also known as genetic recombination, occurs during the prophase I stage of meiosis, specifically during a substage called…

• A. Metaphase
• B. Prophase
• C. Anaphase
• D. Diplotene

Explanation: During anaphase of mitosis, chromatids move towards opposite poles of the cell due to the actions of spindle fibers, also known as…

• A. 4
• B. 6
• C. 5
• D. 3

Explanation: Prophase I, the first stage of meiosis I, is divided into several substages, each characterized by specific events that occur as the cell…

• A. Globulin
• B. Fibrin
• C. Actin and myosin
• D. Hemoglobin

Explanation: Actin and myosin proteins are actively involved in cytokinesis, the process by which the cytoplasm of a parent cell is divided into two…

• A. 0.40 - 0.80 um
• B. 1 um - 3 um
• C. 0.25 - 0.50 um
• D. 0.60 - 1.2 um

Explanation: The length of chromosomes is 0.25 - 0.50 um.

• A. Aster and spindle
• B. Resting phase
• C. Chromatin
• D. 4.5 hours

Explanation: Interphase is often referred to as a "resting phase," but this term is somewhat misleading.

• A. Resting phase
• B. Chromatin
• C. Centromere
• D. Aster and spindle

Explanation: The mitotic spindle includes two main components: the spindle itself and the asters.1.

• A. Centromere
• B. Resting phase
• C. Aster and spindle
• D. 4.5 hours

Explanation: The kinetochore and centromere are closely related structures found on chromosomes, and their interaction is essential for proper…

• A. Somatic cells
• B. Plant cell
• C. Zygotene
• D. Pachytene

Explanation: The phragmoplast is a structure that forms during plant cell division, specifically during cytokinesis, which is the final stage of cell…

• A. Plant cell
• B. Pachytene
• C. Anaphase I
• D. Somatic cells

Explanation: During the pachytene stage of prophase I in meiosis:1. Homologous chromosomes fully synapse, forming structures called tetrads or…

• A. Necrosis
• B. Klinefelter's syndrome
• C. Turner's syndrome
• D. Mitosis

Explanation: Necrosis is a form of cell death caused by external factors such as injury, infection, or toxins, leading to the premature death of cells.