Cell Biology | MCQs

Explanation

Mitochondria is known as powerhouse of cell because it serves as site for synthesis of Adenosine Triphosphate (ATP),

the energy currency of cell, through the process of aerobic cellular respiration.

ATP serves as energy currency for different cell activities.

A cell consists of three parts:

1. The cell membrane,

2. The nucleus, and,

3. Between the two, the cytoplasm.

Explanation

The cell was first coined by an English scientist Robert Hooke in the year 1665.

Later the cell theory was given by Matthias Schleiden and Theodor Schwann.

Explanation

Discoverer of Cell: Robert Hook

Robert Hook described the cell as: Basic unit of life

Explanation

Explanation

Explanation

• Chloroplasts are organelles found in plant cells.
• Animal cells do not have chloroplasts.
• That's why chloroplast is a major difference between animal and plant cells.

Explanation

• Replication is the process by which a cell makes an exact copy of its DNA before cell division, ensuring that the new cell receives a complete set of genetic instructions.
• This process is crucial for the transmission of genetic information from one generation of cells to the next.

Explanation

Most living things, including animals, plants, and microorganisms, use oxygen (O2) to produce ATP through cellular respiration.

ATP is the primary energy currency of the cell, and it's essential for various biological processes like muscle contraction, nerve impulses, and biosynthesis.

Explanation

Centrioles are composed of 27 microtubules arranged in a specific pattern of nine triplets (9 x 3 = 27).

These microtubules are highly stable and form a rigid structure that plays a critical role in the formation of cilia, flagella, and spindle fibers during cell division.

Explanation

Diffusion is a passive process, meaning it does not require energy input.

In diffusion, particles move from an area of higher concentration to an area of lower concentration until they are evenly distributed, without the use of energy.