Explanation

Eukaryotic ribosomes are made of two subunits: 60S (large) and 40S (small), combining to form the 80S ribosome.

The "S" stands for Svedberg unit, a measure of sedimentation rate during centrifugation.

Explanation

Cytosol is the soluble, fluid portion of the cytoplasm where organelles are suspended.

It plays a key role in metabolic reactions, transport, and cell signaling within the cytoplasm.

Explanation

Phagocytic white blood cells (like macrophages) actively engulf and digest pathogens using lysosomes.

These cells have a high number of lysosomes, making them ideal for studying lysosomal activity and function.

Explanation

Starch is a type of polysaccharide, which falls under the category of carbohydrates.

It is a complex carbohydrate made up of many glucose units and serves as an energy storage molecule in plants.

Explanation

Sodium (Na) and Chlorine (Cl) together make up about 0.45% of the human body mass.

They are essential electrolytes that help regulate fluid balance, nerve function, and muscle activity.

Explanation

Nitrogen makes up about 3% of the human body by mass.

It is mostly found in proteins, DNA, and RNA.

It is essential for building amino acids and nucleic acids in the body.

Explanation

The number of bioelements considered vital for life is 16. These essential elements include:

1. Carbon (C)
2. Hydrogen (H)
3. Oxygen (O)
4. Nitrogen (N)
5. Phosphorus (P)
6. Sulfur (S)
7. Potassium (K)
8. Calcium (Ca)
9. Magnesium (Mg)
10. Iron (Fe)
11. Sodium (Na)
12. Chlorine (Cl)
13. Copper (Cu)
14. Zinc (Zn)
15. Manganese (Mn)
16. Iodine (I)

Explanation

Protozoa are often studied under parasitology because many are parasites causing diseases like malaria and amoebiasis.

Though protozoa are microorganisms, their parasitic nature makes them a key focus in parasitology.

Explanation

The average cell cycle duration in a typical human cell is approximately 24 hours.

This includes all phases: G₁, S, G₂, and M (mitosis), essential for proper cell division.

Explanation

During prophase, the cytoplasm becomes more viscous to help stabilize the cell as chromosomes condense and the spindle apparatus begins to form.

This change supports the reorganization of cellular components needed for mitosis.