Explanation

• Optimum pH is the point where an enzyme is most active.
• It is the pH at which the enzyme catalyzes the reaction at its maximum rate. 
• Different enzymes have different optimum pH values, depending on their structure and function.

Explanation

Metabolic reactions are both constructive (anabolic) and destructive (catabolic) reactions.

Explanation

• Inhibitors are molecules that bind to enzymes and decrease their activity, thereby slowing down or preventing the biochemical reaction.
• Enzyme activity is not enhanced by inhibitors, but rather inhibited.

Explanation

• Non-disjunction is the phenomenon where a pair of homologous chromosomes (or a pair of sister chromatids) fails to separate properly during meiosis.
• Resulting in an abnormal number of chromosomes in the daughter cells.
• This can lead to genetic abnormalities, such as Down syndrome (trisomy 21), or other chromosomal disorders.

Explanation

• In Anaphase-II of meiosis, the centromeres shorten and the paired chromatids (sister chromatids) are pulled away from one another, moving to opposite poles of the cell.
• This is the stage where the genetic material is finally separated, and each pole receives a complete set of chromosomes.

Explanation

• In Telophase, the chromatids (now called chromosomes) have reached the poles of the cell and their movement ceases.
• The nuclear envelope begins to reform around each set of chromosomes, and the cytoskeleton reorganizes to prepare the cell for cytokinesis (cell division).

Explanation

• Meiosis is a type of cell division that occurs in spore-producing organisms, such as plants and fungi, to produce spores.
• In meiosis, a diploid spore mother cell (sporocyte) undergoes two successive cell divisions (meiosis I and meiosis II) to produce four haploid spores.

Explanation

• Meiosis is a type of cell division that occurs in germ cells (reproductive cells) to produce gametes (sperm or egg cells).
• It does not produce new somatic cells (non-reproductive cells).

Explanation

• The sequence of physiological changes by which a cell commits suicide is called apoptosis.
• This is a controlled, programmed cell death process that is crucial for maintaining healthy tissue function and development.

Explanation

• During prophase of mitosis in an animal cell, separation of centrioles occurs.
• The centrioles move to opposite poles of the cell to help organize the mitotic spindle.