Explanation

Activators are molecules that increase the activity of enzymes, often by binding to a specific site on the enzyme.

Inhibitors are molecules that decrease the activity of enzymes, often by binding to a specific site on the enzyme.

Explanation

In a constructive reaction, also known as a synthesis reaction, large molecules are formed from smaller ones.

This type of reaction involves the combination of two or more molecules to form a larger molecule, often with the release of energy.

Explanation

The presence of an enzyme does not affect the nature or properties of the end products of a chemical reaction.

Enzymes only speed up the reaction, they do not change the final result.

The end products are the same, regardless of whether an enzyme is present or not.

Explanation

Enzymes lower the activation energy, allowing the reaction to proceed faster and more efficiently.

This enables the reaction to occur with less energy input, making it more feasible and rapid.

Explanation

There are indeed two main types of metabolic reactions:

1. Anabolic reactions (building molecules, requiring energy)
2. Catabolic reactions (breaking down molecules, releasing energy)

Explanation

The cell cycle is also known as the cell division cycle.

It is the sequence of changes that occurs between one cell division and the next.

Explanation

Necrosis is a type of cell death caused by external factors such as injury, infection, toxins, or lack of blood supply.

It is a premature and uncontrolled death of cells, often resulting in inflammation and tissue damage.

Explanation

During metaphase, homologous chromosomes (pairs of chromosomes that contain the same genes) arrange themselves on the equator of the spindle, also known as the metaphase plate.

This is a critical step in the cell division process, ensuring that each daughter cell receives a complete set of chromosomes.

Explanation

Meiosis in animals produces gametes, which are the reproductive cells (sperm and egg cells) that are necessary for sexual reproduction.

Meiosis is the process by which a diploid (having two sets of chromosomes) cell divides to produce four haploid (having one set of chromosomes) cells, each with half the number of chromosomes as the parent cell.

Explanation

The G1 phase (Gap 1 phase) is the period of extensive metabolic activity in the cell cycle where the cell grows, enzymes are synthesized, and DNA is replicated.

This phase is also known as the interphase or the growth phase.